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path: root/Master/texmf-dist/doc/latex/greek-fontenc/alphabeta.sty.html
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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta charset="utf-8"/>
<meta name="generator" content="Docutils 0.15b.dev: http://docutils.sourceforge.net/" />
<title>alphabeta: Greek symbols in text and math</title>
<meta name="dcterms.rights" content="© 2010 Günter Milde" />
<link rel="schema.dcterms" href="http://purl.org/dc/terms/">
<style type="text/css">

/* Minimal style sheet for the HTML output of Docutils.                    */
/*                                                                         */
/* :Author: Günter Milde, based on html4css1.css by David Goodger          */
/* :Id: $Id: minimal.css 8036 2017-02-14 13:05:46Z milde $               */
/* :Copyright: © 2015 Günter Milde.                                        */
/* :License: Released under the terms of the `2-Clause BSD license`_,      */
/*    in short:                                                            */
/*                                                                         */
/*    Copying and distribution of this file, with or without modification, */
/*    are permitted in any medium without royalty provided the copyright   */
/*    notice and this notice are preserved.                                */
/*                                                                         */
/*    This file is offered as-is, without any warranty.                    */
/*                                                                         */
/* .. _2-Clause BSD license: http://www.spdx.org/licenses/BSD-2-Clause     */

/* This CSS2.1_ stylesheet defines rules for Docutils elements without    */
/* HTML equivalent. It is required to make the document semantic visible. */
/*                                                                        */
/* .. _CSS2.1: http://www.w3.org/TR/CSS2                                  */
/* .. _validates: http://jigsaw.w3.org/css-validator/validator$link       */

/* alignment of text and inline objects inside block objects*/
.align-left   { text-align: left; }
.align-right  { text-align: right; }
.align-center { clear: both; text-align: center; }
.align-top    { vertical-align: top; }
.align-middle { vertical-align: middle; }
.align-bottom { vertical-align: bottom; }

/* titles */
h1.title, p.subtitle {
  text-align: center;
}
p.admonition-title,
p.topic-title,
p.sidebar-title,
p.rubric,
p.system-message-title {
  font-weight: bold;
}
h1 + p.subtitle,
h1 + p.section-subtitle {
  font-size: 1.6em;
}
h2 + p.section-subtitle { font-size: 1.28em; }
p.subtitle,
p.section-subtitle,
p.sidebar-subtitle {
  font-weight: bold;
  margin-top: -0.5em;
}
p.sidebar-title,
p.rubric {
  font-size: larger;
}
p.rubric { color: maroon; }
a.toc-backref {
  color: black;
  text-decoration: none; }

/* Warnings, Errors */
div.caution p.admonition-title,
div.attention p.admonition-title,
div.danger p.admonition-title,
div.error p.admonition-title,
div.warning p.admonition-title,
div.system-messages h1,
div.error,
span.problematic,
p.system-message-title {
  color: red;
}

/* inline literals */
span.docutils.literal {
  font-family: monospace;
  white-space: pre-wrap;
}
/* do not wraph at hyphens and similar: */
.literal > span.pre { white-space: nowrap; }

/* Lists */

/* compact and simple lists: no margin between items */
.simple  li, .compact li,
.simple  ul, .compact ul,
.simple  ol, .compact ol,
.simple > li p, .compact > li p,
dl.simple > dd, dl.compact > dd {
  margin-top: 0;
  margin-bottom: 0;
}

/* Table of Contents */
div.topic.contents { margin: 0; }
ul.auto-toc {
  list-style-type: none;
  padding-left: 1.5em; }

/* Enumerated Lists */
ol.arabic     { list-style: decimal }
ol.loweralpha { list-style: lower-alpha }
ol.upperalpha { list-style: upper-alpha }
ol.lowerroman { list-style: lower-roman }
ol.upperroman { list-style: upper-roman }

dt span.classifier { font-style: italic }
dt span.classifier:before {
  font-style: normal;
  margin: 0.5em;
  content: ":";
}

/* Field Lists and drivatives */
/* bold field name, content starts on the same line */
dl.field-list > dt,
dl.option-list > dt,
dl.docinfo > dt,
dl.footnote > dt,
dl.citation > dt {
  font-weight: bold;
  clear: left;
  float: left;
  margin: 0;
  padding: 0;
  padding-right: 0.5em;
}
/* Offset for field content (corresponds to the --field-name-limit option) */
dl.field-list > dd,
dl.option-list > dd,
dl.docinfo > dd {
  margin-left:  9em; /* ca. 14 chars in the test examples */
}
/* start field-body on a new line after long field names */
dl.field-list > dd > *:first-child,
dl.option-list > dd > *:first-child
{
  display: inline-block;
  width: 100%;
  margin: 0;
}
/* field names followed by a colon */
dl.field-list > dt:after,
dl.docinfo > dt:after {
  content: ":";
}

/* Bibliographic Fields (docinfo) */
pre.address { font: inherit; }
dd.authors > p { margin: 0; }

/* Option Lists */
dl.option-list { margin-left: 40px; }
dl.option-list > dt { font-weight: normal; }
span.option { white-space: nowrap; }

/* Footnotes and Citations  */
dl.footnote.superscript > dd {margin-left: 1em; }
dl.footnote.brackets > dd {margin-left: 2em; }
dl > dt.label { font-weight: normal; }
a.footnote-reference.brackets:before,
dt.label > span.brackets:before { content: "["; }
a.footnote-reference.brackets:after,
dt.label > span.brackets:after { content: "]"; }
a.footnote-reference.superscript,
dl.footnote.superscript > dt.label {
  vertical-align: super;
  font-size: smaller;
}
dt.label > span.fn-backref { margin-left: 0.2em; }
dt.label > span.fn-backref > a { font-style: italic; }

/* Line Blocks */
div.line-block { display: block; }
div.line-block div.line-block {
  margin-top: 0;
  margin-bottom: 0;
  margin-left: 40px;
}

/* Figures, Images, and Tables */
.figure.align-left,
img.align-left,
object.align-left,
table.align-left {
  margin-right: auto;
}
.figure.align-center,
img.align-center,
object.align-center {
  margin-left: auto;
  margin-right: auto;
  display: block;
}
table.align-center {
  margin-left: auto;
  margin-right: auto;
}
.figure.align-right,
img.align-right,
object.align-right,
table.align-right {
  margin-left: auto;
}
/* reset inner alignment in figures and tables */
/* div.align-left, div.align-center, div.align-right, */
table.align-left, table.align-center, table.align-right
{ text-align: inherit }

/* Admonitions and System Messages */
div.admonition,
div.system-message,
div.sidebar{
  margin: 40px;
  border: medium outset;
  padding-right: 1em;
  padding-left: 1em;
}

/* Sidebar */
div.sidebar {
  width: 30%;
  max-width: 26em;
  float: right;
  clear: right;
}

/* Text Blocks */
div.topic,
pre.literal-block,
pre.doctest-block,
pre.math,
pre.code {
  margin-right: 40px;
  margin-left: 40px;
}
pre.code .ln { color: gray; } /* line numbers */

/* Tables */
table { border-collapse: collapse; }
td, th {
  border-style: solid;
  border-color: silver;
  padding: 0 1ex;
  border-width: thin;
}
td > p:first-child, th > p:first-child { margin-top: 0; }
td > p, th > p { margin-bottom: 0; }

table > caption {
  text-align: left;
  margin-bottom: 0.25em
}

table.borderless td, table.borderless th {
  border: 0;
  padding: 0;
  padding-right: 0.5em /* separate table cells */
}

</style>
<style type="text/css">

/* CSS31_ style sheet for the output of Docutils HTML writers.             */
/* Rules for easy reading and pre-defined style variants.		   */
/*                                                                         */
/* :Author: Günter Milde, based on html4css1.css by David Goodger          */
/* :Id: $Id: plain.css 8120 2017-06-22 21:02:40Z milde $               */
/* :Copyright: © 2015 Günter Milde.                                        */
/* :License: Released under the terms of the `2-Clause BSD license`_,      */
/*    in short:                                                            */
/*                                                                         */
/*    Copying and distribution of this file, with or without modification, */
/*    are permitted in any medium without royalty provided the copyright   */
/*    notice and this notice are preserved.                                */
/*    	     	      	     	 					   */
/*    This file is offered as-is, without any warranty.                    */
/*                                                                         */
/* .. _2-Clause BSD license: http://www.spdx.org/licenses/BSD-2-Clause     */
/* .. _CSS3: http://www.w3.org/TR/CSS3		        		   */


/* Document Structure */
/* ****************** */

/* "page layout" */
body {
  padding: 0 5%;
  margin: 8px 0;
}
div.document {
  line-height:1.3;
  counter-reset: table;
  /* counter-reset: figure; */
  /* avoid long lines --> better reading */
  /* OTOH: lines should not be too short because of missing hyphenation, */
  max-width: 50em;
  margin: auto;
}

/* Sections */

/* Transitions */

hr.docutils {
  width: 80%;
  margin-top: 1em;
  margin-bottom: 1em;
  clear: both;
}

/* Paragraphs               */
/* ==========               */

/* vertical space (parskip) */
p, ol, ul, dl,
div.line-block,
table{
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}
h1, h2, h3, h4, h5, h6,
dl > dd {
  margin-bottom: 0.5em;
}

/* Lists                    */
/* ==========               */

/* Definition Lists         */

dl > dd > p:first-child { margin-top: 0; }
/* :last-child is not part of CSS 2.1 (introduced in CSS 3) */
dl > dd > p:last-child  { margin-bottom: 0; }

/* lists nested in definition lists */
/* :only-child is not part of CSS 2.1 (introduced in CSS 3) */
dd > ul:only-child, dd > ol:only-child { padding-left: 1em; }

/* Description Lists */
/* styled like in most dictionaries, encyclopedias etc. */
dl.description > dt {
  font-weight: bold;
  clear: left;
  float: left;
  margin: 0;
  padding: 0;
  padding-right: 0.5em;
}

/* Field Lists */

/* example for custom field-name width */
dl.field-list.narrow > dd {
  margin-left: 5em;
}
/* run-in: start field-body on same line after long field names */
dl.field-list.run-in > dd p {
  display: block;
}

/* Bibliographic Fields */

/* generally, bibliographic fields use special definition list dl.docinfo */
/* but dedication and abstract are placed into "topic" divs */
div.abstract p.topic-title {
  text-align: center;
}
div.dedication {
  margin: 2em 5em;
  text-align: center;
  font-style: italic;
}
div.dedication p.topic-title {
  font-style: normal;
}

/* Citations */
dl.citation dt.label {
  font-weight: bold;
}
span.fn-backref {
  font-weight: normal;
}

/* Text Blocks           */
/* ============          */

/* Literal Blocks           */
pre.literal-block, pre.doctest-block,
pre.math, pre.code {
  margin-left: 1.5em;
  margin-right: 1.5em
}

/* Block Quotes             */

blockquote,
div.topic {
  margin-left: 1.5em;
  margin-right: 1.5em
}
blockquote > table,
div.topic > table {
  margin-top: 0;
  margin-bottom: 0;
}
blockquote p.attribution,
div.topic p.attribution {
  text-align: right;
  margin-left: 20%;
}

/* Tables                   */
/* ======                   */

/* th { vertical-align: bottom; } */

table tr { text-align: left; }

/* "booktabs" style (no vertical lines) */
table.booktabs {
  border: 0;
  border-top: 2px solid;
  border-bottom: 2px solid;
  border-collapse: collapse;
}
table.booktabs * {
  border: 0;
}
table.booktabs th {
  border-bottom: thin solid;
}

/* numbered tables (counter defined in div.document) */
table.numbered > caption:before {
  counter-increment: table;
  content: "Table " counter(table) ": ";
  font-weight: bold;
}

/* Explicit Markup Blocks   */
/* ======================   */

/* Footnotes and Citations  */
/* -----------------------  */

/* line on the left */
dl.footnote {
  padding-left: 1ex;
  border-left: solid;
  border-left-width: thin;
}

/* Directives               */
/* ----------               */

/* Body Elements            */
/* ~~~~~~~~~~~~~            */

/* Images and Figures */

/* let content flow to the side of aligned images and figures */
.figure.align-left,
img.align-left,
object.align-left {
  display: block;
  clear: left;
  float: left;
  margin-right: 1em
}
.figure.align-right,
img.align-right,
object.align-right {
  display: block;
  clear: right;
  float: right;
  margin-left: 1em
}
/* Stop floating sidebars, images and figures at section level 1,2,3 */
h1, h2, h3 { clear: both; }

/* Sidebar */

/* Move into the margin. In a layout with fixed margins, */
/* it can be moved into the margin completely.		 */
div.sidebar {
  width: 30%;
  max-width: 26em;
  margin-left: 1em;
  margin-right: -5.5%;
  background-color: #ffffee ;
}

/* Code                     */

pre.code, code { background-color: #eeeeee }
pre.code .ln { color: gray; } /* line numbers */
/* basic highlighting: for a complete scheme, see */
/* http://docutils.sourceforge.net/sandbox/stylesheets/ */
pre.code .comment, code .comment { color: #5C6576 }
pre.code .keyword, code .keyword { color: #3B0D06; font-weight: bold }
pre.code .literal.string, code .literal.string { color: #0C5404 }
pre.code .name.builtin, code .name.builtin { color: #352B84 }
pre.code .deleted, code .deleted { background-color: #DEB0A1}
pre.code .inserted, code .inserted { background-color: #A3D289}

/* Math                     */
/* styled separately (see math.css for math-output=HTML) */

/* Epigraph                 */
/* Highlights               */
/* Pull-Quote               */
/* Compound Paragraph       */
/* Container                */

/* can be styled in a custom stylesheet */

/* Document Header and Footer */

div.footer, div.header {
  clear: both;
  font-size: smaller;
}

/* Inline Markup            */
/* =============            */

/* Emphasis                 */
/*   em                     */
/* Strong Emphasis          */
/*   strong		    */
/* Interpreted Text         */
/*   span.interpreted  	    */
/* Title Reference 	    */
/*   cite		    */
/* Inline Literals          */
/* possible values: normal, nowrap, pre, pre-wrap, pre-line */
/*   span.docutils.literal { white-space: pre-wrap; } */

/* Hyperlink References     */
a { text-decoration: none; }

/* External Targets         */
/*   span.target.external   */
/* Internal Targets  	    */
/*   span.target.internal   */
/* Footnote References      */
/*   a.footnote-reference   */
/* Citation References      */
/*   a.citation-reference   */

</style>
</head>
<body>
<div class="document" id="alphabeta-greek-symbols-in-text-and-math">
<h1 class="title">alphabeta: Greek symbols in text and math</h1>

<dl class="docinfo">
<dt class="copyright">Copyright</dt>
<dd class="copyright">© 2010 Günter Milde</dd>
<dt class="licence">Licence</dt>
<dd class="licence"><p>This work may be distributed and/or modified under the
conditions of the <a class="reference external" href="http://www.latex-project.org/lppl.txt">LaTeX Project Public License</a>, either
version 1.3 of this license or any later version.</p>
</dd>
<dt class="identification">Identification</dt>
<dd class="identification"><pre class="literal-block">\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{alphabeta}
[2016/02/05 v0.13.2 macros for Greek letters in text and math]</pre>
</dd>
</dl>
<div class="abstract topic">
<p class="topic-title first">Abstract</p>
<p>Use <span class="docutils literal">\alpha, \beta, ...</span> for Greek letters in text and math
mode.</p>
</div>
<dl>
<dt>Changelog:</dt>
<dd><table class="borderless">
<colgroup>
<col style="width: 8%" />
<col style="width: 14%" />
<col style="width: 78%" />
</colgroup>
<tbody>
<tr><td><p>0.1</p></td>
<td><p>2012-06-26</p></td>
<td><p>initial version</p></td>
</tr>
<tr><td><p>0.2</p></td>
<td><p>2013-05-03</p></td>
<td><p>new accent macro names with <span class="docutils literal">lgrxenc.def</span> 0.7</p></td>
</tr>
<tr><td><p>0.3</p></td>
<td><p>2013-05-28</p></td>
<td><p>use <span class="docutils literal">lgrenc.def</span> from greek-fontenc,</p></td>
</tr>
<tr><td><!--  -->
</td>
<td></td>
<td><p>enable Unicode input in math mode.</p></td>
</tr>
<tr><td><p>0.4</p></td>
<td><p>2013-09-11</p></td>
<td><p>move to <a class="reference external" href="http://www.ctan.org/pkg/greek-fontenc">greek-fontenc</a>, support XeTeX/LuaTeX.</p></td>
</tr>
<tr><td><p>0.13</p></td>
<td><p>2015-09-04</p></td>
<td><p>Support for <cite>variant symbols</cite>.</p></td>
</tr>
<tr><td><p>0.13.2</p></td>
<td><p>2016-02-05</p></td>
<td><p>Support for standard Unicode text font encoding “TU”
(new in fontspec v2.5a).</p></td>
</tr>
</tbody>
</table>
</dd>
</dl>
<div class="section" id="motivation">
<h1>Motivation</h1>
<p>By default, the <span class="docutils literal">\alpha, \beta, ...</span> macros for Greek letters
are only valid in mathematical mode.</p>
<p>With this package, the math macros are redefined to work in both, text and
math mode, so that Greek letters can be specified with the established
command names in text, too.</p>
<p>If used together with the <span class="docutils literal">utf8</span> option of <a class="reference external" href="http://www.ctan.org/pkg/inputenc">inputenc</a>, literal Unicode
characters can be used for Greek symbols in mathematical formulas.</p>
<div class="admonition attention">
<p class="admonition-title">Attention!</p>
<p>The macros work well in any font encoding for single symbols.
However, with 8-bit TeX, the automatic font-encoding switches behind the
doors interfere with kerning between letters and replacement of
accent+character with a pre-composed character.</p>
<p>Therefore, Greek text should be written with the help of <a class="reference external" href="http://www.ctan.org/cgi-bin/ctanPackageInformation.py?id=babel">babel</a> or
<a class="reference external" href="http://www.ctan.org/pkg/polyglossia">polyglossia</a> (setting the language to <span class="docutils literal">greek</span>) or wrapped in the
provided <span class="docutils literal">ensuregreek</span> macro.  Using <a class="reference external" href="http://www.ctan.org/cgi-bin/ctanPackageInformation.py?id=babel">babel</a> or <a class="reference external" href="http://www.ctan.org/pkg/polyglossia">polyglossia</a> also helps
to ensure proper hyphenation.</p>
</div>
</div>
<div class="section" id="usage">
<h1>Usage</h1>
<pre class="code latex literal-block"><code><span class="keyword">\usepackage</span><span class="name builtin">{</span>alphabeta<span class="name builtin">}</span></code></pre>
<p>The <a class="reference external" href="http://www.ctan.org/pkg/greek-inputenc">greek-inputenc</a> package provides support for Unicode (utf-8) input
of Greek characters with 8-bit TeX and the <a class="reference external" href="http://www.ctan.org/pkg/inputenc">inputenc</a> package:</p>
<pre class="code latex literal-block"><code><span class="keyword">\usepackage</span><span class="name attribute">[utf-8]</span><span class="name builtin">{</span>inputenc<span class="name builtin">}</span>
<span class="keyword">\usepackage</span><span class="name builtin">{</span>alphabeta<span class="name builtin">}</span></code></pre>
<div class="section" id="conflicts">
<h2>Conflicts</h2>
<p><cite>alphabeta</cite> does not work if the <span class="docutils literal">utf8x</span> input encoding is selected.
(<span class="docutils literal">utf8x</span> is an interface to the <span class="docutils literal">ucs</span> package which uses a
non-compatible definition of <span class="docutils literal">\DeclareUnicodeCharacter</span>.)</p>
<p>For details see <a class="reference external" href="alphabeta-doc.tex">alphabeta-doc.tex</a> and <a class="reference external" href="alphabeta-doc.pdf">alphabeta-doc.pdf</a>.</p>
</div>
</div>
<div class="section" id="implementation">
<h1>Implementation</h1>
<div class="section" id="requirements">
<h2>Requirements</h2>
<p>This package extends the <a class="reference external" href="textalpha.sty.html">textalpha</a> package.
Package options are passed on to <cite>textalpha</cite>:</p>
<pre class="literal-block">\RequirePackageWithOptions{textalpha}</pre>
<p>Just like <cite>alphabeta</cite>, <cite>textalpha</cite> is part of <a class="reference external" href="http://www.ctan.org/pkg/greek-fontenc">greek-fontenc</a>.</p>
<p>This package requires the <a class="reference external" href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=etex">e-TeX</a> extensions (i.e. a not too old TeX
distribution) for the <span class="docutils literal">\ifdefined</span> test.</p>
<p>It uses the <span class="docutils literal">\TextOrMath</span> test from the <a class="reference external" href="http://www.ctan.org/pkg/fixltx2e">fixltx2e</a> standard LaTeX package.
<span class="docutils literal">fixltx2e</span> is loaded by default since TeXLive 2015. In case of an
<span class="docutils literal">\TextOrMath undefined</span> error, load it in the document preamble via</p>
<pre class="code latex literal-block"><code><span class="keyword">\usepackage</span><span class="name builtin">{</span>fixltx2e<span class="name builtin">}</span></code></pre>
</div>
<div class="section" id="postpone-the-re-definitions">
<h2>Postpone the re-definitions</h2>
<p>To prevent other packages overwriting the re-defined commands we postpone
the next steps until the start of the document body:</p>
<pre class="literal-block">\AtBeginDocument{</pre>
</div>
<div class="section" id="save-math-macros">
<h2>Save math macros</h2>
<p>Provide an alias for the standard math commands:</p>
<pre class="literal-block">\let\mathGamma\Gamma
\let\mathDelta\Delta
\let\mathTheta\Theta
\let\mathLambda\Lambda
\let\mathXi\Xi
\let\mathPi\Pi
\let\mathSigma\Sigma
\let\mathUpsilon\Upsilon
\let\mathPhi\Phi
\let\mathPsi\Psi
\let\mathOmega\Omega
%
\let\mathalpha\alpha
\let\mathbeta\beta
\let\mathgamma\gamma
\let\mathdelta\delta
\let\mathepsilon\epsilon
\let\mathvarepsilon\varepsilon
\let\mathzeta\zeta
\let\matheta\eta
\let\maththeta\theta
\let\mathvartheta\vartheta
\let\mathiota\iota
\let\mathkappa\kappa
\let\mathlambda\lambda
\let\mathmu\mu
\let\mathnu\nu
\let\mathxi\xi
\let\mathpi\pi
\let\mathvarpi\varpi
\let\mathrho\rho
\let\mathvarrho\varrho
\let\mathsigma\sigma
\let\mathvarsigma\varsigma
\let\mathfinalsigma\varsigma
\let\mathtau\tau
\let\mathupsilon\upsilon
\let\mathphi\phi
\let\mathvarphi\varphi
\let\mathchi\chi
\let\mathpsi\psi
\let\mathomega\omega
% ``\digamma`` is defined by amsmath, provide a fallback
\providecommand*{\digamma}{\textit{\textdigamma}}
\let\mathdigamma\digamma

% \varkappa and \varbeta are defined by some math packages
\ifdefined\varbeta
  \let\mathvarbeta\varbeta
\fi
\ifdefined\varkappa % e.g. with newtxmath
  \let\mathvarkappa\varkappa
\fi</pre>
</div>
<div class="section" id="commands-to-access-greek-letters-by-name">
<h2>Commands to access Greek letters by name</h2>
<p>For letters defined in math mode, the commands work in both, text and math.</p>
<p>Some Greek letters look identical to Latin letters and can therefore not be
used as variable symbols in math formulas. These letters are not defined in
TeX’s math mode, we provide an alias to the corrsponding <span class="docutils literal"><span class="pre">\text...</span></span>
command.</p>
<p>Mathematical notation distinguishes <a class="reference internal" href="#variant-shape-symbols">variant shape symbols</a> for pi, phi,
rho, theta (small and capital), beta, and kappa (characters for the latter
three symbols are not included in TeX’s math fonts). These variations have
no syntactic meaning in Greek text and are not given code-points in the LGR
encoding while Unicode defines separate code points for the symbol variants.</p>
<p>Greek Alphabet:</p>
<p>Macros keep their meaning in mathematical mode (i.e. use the same shape as
without this package) and refer to GREEK LETTER … in text. For
<span class="docutils literal">\epsilon</span> and <span class="docutils literal">phi</span>, this means that the selected symbol variant
differs in text vs. math mode. Use <span class="docutils literal">\varepsilon</span> and <span class="docutils literal">\varphi</span> (see
section <a class="reference internal" href="#variant-shape-symbols">variant shape symbols</a> below) to select the GREEK LETTER …”
in both, text and math mode.</p>
<pre class="literal-block">\providecommand*{\Alpha}{\textAlpha}
\providecommand*{\Beta}{\textBeta}
\renewcommand*{\Gamma}{\TextOrMath{\textGamma}{\mathGamma}}
\renewcommand*{\Delta}{\TextOrMath{\textDelta}{\mathDelta}}
\providecommand*{\Epsilon}{\textEpsilon}
\providecommand*{\Zeta}{\textZeta}
\providecommand*{\Eta}{\textEta}
\renewcommand*{\Theta}{\TextOrMath{\textTheta}{\mathTheta}}
\providecommand*{\Iota}{\textIota}
\providecommand*{\Kappa}{\textKappa}
\renewcommand*{\Lambda}{\TextOrMath{\textLambda}{\mathLambda}}
\providecommand*{\Mu}{\textMu}
\providecommand*{\Nu}{\textNu}
\renewcommand*{\Xi}{\TextOrMath{\textXi}{\mathXi}}
\providecommand*{\Omicron}{\textOmicron}
\renewcommand*{\Pi}{\TextOrMath{\textPi}{\mathPi}}
\providecommand*{\Rho}{\textRho}
\renewcommand*{\Sigma}{\TextOrMath{\textSigma}{\mathSigma}}
\providecommand*{\Tau}{\textTau}
\renewcommand*{\Upsilon}{\TextOrMath{\textUpsilon}{\mathUpsilon}}
\renewcommand*{\Phi}{\TextOrMath{\textPhi}{\mathPhi}}
\providecommand*{\Chi}{\textChi}
\renewcommand*{\Psi}{\TextOrMath{\textPsi}{\mathPsi}}
\renewcommand*{\Omega}{\TextOrMath{\textOmega}{\mathOmega}}
%
\renewcommand*{\alpha}{\TextOrMath{\textalpha}{\mathalpha}}
\renewcommand*{\beta}{\TextOrMath{\textbeta}{\mathbeta}}
\renewcommand*{\gamma}{\TextOrMath{\textgamma}{\mathgamma}}
\renewcommand*{\delta}{\TextOrMath{\textdelta}{\mathdelta}}
\renewcommand*{\epsilon}{\TextOrMath{\textepsilon}{\mathepsilon}} % ε/ϵ
\renewcommand*{\zeta}{\TextOrMath{\textzeta}{\mathzeta}}
\renewcommand*{\eta}{\TextOrMath{\texteta}{\matheta}}
\renewcommand*{\theta}{\TextOrMath{\texttheta}{\maththeta}}
\renewcommand*{\iota}{\TextOrMath{\textiota}{\mathiota}}
\renewcommand*{\kappa}{\TextOrMath{\textkappa}{\mathkappa}}
\renewcommand*{\lambda}{\TextOrMath{\textlambda}{\mathlambda}}
\renewcommand*{\mu}{\TextOrMath{\textmu}{\mathmu}}
\renewcommand*{\nu}{\TextOrMath{\textnu}{\mathnu}}
\renewcommand*{\xi}{\TextOrMath{\textxi}{\mathxi}}
\providecommand*{\omicron}{\textomicron}
\renewcommand*{\pi}{\TextOrMath{\textpi}{\mathpi}}
\renewcommand*{\rho}{\TextOrMath{\textrho}{\mathrho}}
\renewcommand*{\sigma}{\TextOrMath{\textsigma}{\mathsigma}}
\renewcommand*{\varsigma}{\TextOrMath{\textvarsigma}{\mathvarsigma}}
\providecommand*{\finalsigma}{\varsigma}
\renewcommand*{\tau}{\TextOrMath{\texttau}{\mathtau}}
\renewcommand*{\upsilon}{\TextOrMath{\textupsilon}{\mathupsilon}}
\renewcommand*{\phi}{\TextOrMath{\textphi}{\mathphi}}             % ϕ/φ
\renewcommand*{\chi}{\TextOrMath{\textchi}{\mathchi}}
\renewcommand*{\psi}{\TextOrMath{\textpsi}{\mathpsi}}
\renewcommand*{\omega}{\TextOrMath{\textomega}{\mathomega}}</pre>
<div class="section" id="archaic-letters">
<h3>Archaic letters</h3>
<pre class="literal-block">\renewcommand*{\digamma}{\TextOrMath{\textdigamma}{\mathdigamma}} % ϝ
\providecommand*{\Digamma}{\textDigamma}     % Ϝ
\providecommand*{\stigma}{\textstigma}       % ϛ
\providecommand*{\varstigma}{\textvarstigma} % stigma variant (CB.enc, teubner)
\providecommand*{\koppa}{\textkoppa}         % ϟ (greek small letter koppa)
\providecommand*{\qoppa}{\textqoppa}         % ϙ (archaic koppa)
\providecommand*{\Qoppa}{\textQoppa}         % Ϙ (archaic Koppa)
\providecommand*{\Stigma}{\textStigma}       % Ϛ (in some fonts ϹΤ ligature)
\providecommand*{\Sampi}{\textSampi}         % Ϡ
\providecommand*{\sampi}{\textsampi}         % ϡ</pre>
</div>
<div class="section" id="variant-shape-symbols">
<h3>Variant shape symbols</h3>
<p>TeX’s concept of “standard” vs. “variant” math symbols does not map to the
distinction between GREEK LETTER … vs. GREEK … SYMBOL in the Unicode
standard (see <a class="reference external" href="greek-euenc-doc.pdf">greek-euenc-doc.pdf</a>).</p>
<p>The <span class="docutils literal"><span class="pre">\...symbol</span></span>  macros select the GREEK … SYMBOL in both, text and
math mode. For <span class="docutils literal">\epsilonsymbol</span> and <span class="docutils literal">\phisymbol</span> this is the default
shape in math mode. The <span class="docutils literal"><span class="pre">\var...</span></span> macros select the shape used by TeX
math (or, if not supported, the SYMBOL shape):</p>
<pre class="literal-block">% ..symbol == var..
\renewcommand*{\varpi}{\TextOrMath{\textpisymbol}{\mathvarpi}}          % ϖ
\providecommand*{\pisymbol}{\varpi}                                     % ϖ
\renewcommand*{\varrho}{\TextOrMath{\textrhosymbol}{\mathvarrho}}       % ϱ
\providecommand*{\rhosymbol}{\TextOrMath{\textrhosymbol}{\mathvarrho}}  % ϱ
\renewcommand*{\vartheta}{\TextOrMath{\textthetasymbol}{\mathvartheta}} % ϑ
\providecommand*{\thetasymbol}{\vartheta}                               % ϑ
% ..symbol != var..
\renewcommand*{\varepsilon}{\TextOrMath{\textepsilon}{\mathvarepsilon}} % ε
\providecommand*{\epsilonsymbol}{\TextOrMath{\textepsilonsymbol}{\mathepsilon}} % ϵ
\renewcommand*{\varphi}{\TextOrMath{\textphi}{\mathvarphi}}             % φ
\providecommand*{\phisymbol}{\TextOrMath{\textphisymbol}{\mathphi}}     % ϕ
% only text (in standard 8-bit TeX, may be defined with additional packages):
\ifdefined\mathvarbeta
  \renewcommand*{\varbeta}{\TextOrMath{\textbetasymbol}{\mathvarbeta}}  % ϐ
\else
  \providecommand*{\varbeta}{\textbetasymbol}
\fi
\providecommand*{\betasymbol}{\varbeta}
\ifdefined\mathvarkappa                                                 % ϰ
  \renewcommand*{\varkappa}{\TextOrMath{\textkappasymbol}{\mathvarkappa}}
\else
  \providecommand*{\varkappa}{\textkappasymbol}
\fi
\providecommand*{\kappasymbol}{\varkappa}
% \Theta/\varTheta are not a symbol variants but upright/italic shape of Theta
\providecommand*{\Thetasymbol}{\textThetasymbol}                        % ϴ</pre>
</div>
</div>
<div class="section" id="textcompositecommands-for-the-generic-macros">
<h2>TextCompositeCommands for the generic macros</h2>
<p>The NFSS TextComposite mechanism looks for the next token without expanding
it. In order to let compositions like <span class="docutils literal"><span class="pre">\ensuregreek{\'\Alpha}</span></span> or
<span class="docutils literal"><span class="pre">\ensuregreek{\&gt;&quot;\alpha}</span></span> work as expected we define TextComposites with the
<cite>letter name commands</cite>. (Composition only works if the active font encoding
is LGR).</p>
<pre class="literal-block">\ifdefined\XeTeXrevision
  \input{alphabeta-euenc.def}
  % \expandafter\endinput % &quot;return&quot;
\else\ifdefined\luatexversion
  \input{alphabeta-euenc.def}
  % \expandafter\endinput % &quot;return&quot;
\else % 8-bit TeX
  \input{alphabeta-lgr.def}
\fi\fi</pre>
</div>
<div class="section" id="re-definition-for-greek-unicode-input-in-math-mode">
<h2>Re-definition for Greek Unicode input in math mode</h2>
<p>Check with <span class="docutils literal">\ifdefined</span> for the definition of
<span class="docutils literal">\DeclareUnicodeCharacter</span>. In contrast to <span class="docutils literal">\&#64;ifdefined</span>, this works
without side-effects. It makes the package dependent on the <a class="reference external" href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=etex">e-TeX</a>
extensions but these are standard in all current TeX distributions anyway.</p>
<p>Map Greek characters that are also defined in math mode to the generic
macros:</p>
<pre class="literal-block">\ifdefined\DeclareUnicodeCharacter
  \DeclareUnicodeCharacter{0393}{\Gamma}         % Γ
  \DeclareUnicodeCharacter{0394}{\Delta}         % Δ
  \DeclareUnicodeCharacter{0398}{\Theta}         % Θ
  \DeclareUnicodeCharacter{039B}{\Lambda}        % Λ
  \DeclareUnicodeCharacter{039E}{\Xi}            % Ξ
  \DeclareUnicodeCharacter{03A0}{\Pi}            % Π
  \DeclareUnicodeCharacter{03A3}{\Sigma}         % Σ
  \DeclareUnicodeCharacter{03A5}{\Upsilon}       % Υ
  \DeclareUnicodeCharacter{03A6}{\Phi}           % Φ
  \DeclareUnicodeCharacter{03A8}{\Psi}           % Ψ
  \DeclareUnicodeCharacter{03A9}{\Omega}         % Ω

  \DeclareUnicodeCharacter{03B1}{\alpha}         % α
  \DeclareUnicodeCharacter{03B2}{\beta}          % β
  \DeclareUnicodeCharacter{03B3}{\gamma}         % γ
  \DeclareUnicodeCharacter{03B4}{\delta}         % δ
  \DeclareUnicodeCharacter{03B5}{\varepsilon}    % ε textepsilon/varepsilon
  \DeclareUnicodeCharacter{03B6}{\zeta}          % ζ
  \DeclareUnicodeCharacter{03B7}{\eta}           % η
  \DeclareUnicodeCharacter{03B8}{\theta}         % θ
  \DeclareUnicodeCharacter{03B9}{\iota}          % ι
  \DeclareUnicodeCharacter{03BA}{\kappa}         % κ
  \DeclareUnicodeCharacter{03BB}{\lambda}        % λ
  \DeclareUnicodeCharacter{03BC}{\mu}            % μ
  \DeclareUnicodeCharacter{03BD}{\nu}            % ν
  \DeclareUnicodeCharacter{03BE}{\xi}            % ξ
  \DeclareUnicodeCharacter{03C0}{\pi}            % π
  \DeclareUnicodeCharacter{03C1}{\rho}           % ρ
  \DeclareUnicodeCharacter{03C2}{\varsigma}      % ς
  \DeclareUnicodeCharacter{03C3}{\sigma}         % σ
  \DeclareUnicodeCharacter{03C4}{\tau}           % τ
  \DeclareUnicodeCharacter{03C5}{\upsilon}       % υ
  \DeclareUnicodeCharacter{03C6}{\varphi}        % φ textphi/varphi
  \DeclareUnicodeCharacter{03C7}{\chi}           % χ
  \DeclareUnicodeCharacter{03C8}{\psi}           % ψ
  \DeclareUnicodeCharacter{03C9}{\omega}         % ω

  \DeclareUnicodeCharacter{03D1}{\thetasymbol}   % ϑ
  \DeclareUnicodeCharacter{03D5}{\phisymbol}     % ϕ $\phi$
  \DeclareUnicodeCharacter{03D6}{\pisymbol}      % ϖ
  \DeclareUnicodeCharacter{03DD}{\digamma}       % ϝ
  \DeclareUnicodeCharacter{03F1}{\rhosymbol}     % ϱ
  \DeclareUnicodeCharacter{03F5}{\epsilonsymbol} % ϵ $\epsilon$

\fi</pre>
<pre class="literal-block">} % close the \AtBeginDocument macro</pre>
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