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The logix package.
This is the README for the logix package, version 2019-07-01 v1.00.
This package provides supplemental symbols for use in logic and mathematics
which are largely not present in Unicode. Some symbols are in Unicode but
are included because they are variants that may look better in some
applications. Logic tends not to have the complex layouts that is common for
more general mathematics, but has different requirements for readability.
This font is intended to complement, but not replace the AMS STIX2 fonts.
However, it may used with any mathematical font since it does not replace or
redefine any symbols.
This is an OpenType font where all of the symbols (more than 4,000) other than
the ASCII codepage are in the private use area. As such, the package requires
XeLaTeX or LuaLaTeX. Not all of those symbols are directly exported, since
there are many variants present for possible future use. While only the
OpenType font file is usable for LaTeX, the .ttf, .woff, .woff2 and .eot font
files are also supplied in this distribution.
Other than many miscellaneous symbols, there are a large number of arrows,
geometrical symbols, Knot drawing symbols, 64 stretchy delimiters plus a
stretchy binding bar, of which 56 are fully stretchable. The remaining 8 are
stretchy up to 5 times the original size. Some of the delimiters are present
in Unicode, but their design in STIX2 does not work as well for logic. In
particular, STIX2 delimiters tend to not extend as far below the baseline
and above the baseline as would be desirable. Also, some STIX2 delimiters
take more horizontal space than is necessary.
There are twenty scripts, each of which (except for the two Greek scripts)
have matching numeric, lower case and upper case glyphs. All symbols in this
font are designed to be compatible with the STIX2 mathematical font by AMS.
Some of these scripts overlap the Unicode math scripts, but are not intended
to be replacements for those. Unicode does not include everything for a specific
script -- digits or lower case may be missing, or even individual letters
(although that may have changed). That is an issue when using a script for
variable naming. Some script variants are omitted. Many of those variants are
useful in logic. The scripts included are sans serif, slab serif, normal serif
(each of these has upright, italic, bold and bold italic versions) as well as
a calligraphic font, blackboard, fraktur (upright and bold), monospace,
monospace italic with normal serif, and Greek (upright and italic).
Licenses:
The logix font is licensed under the Open Font License, version 1.1 or
later.
The font contains modified serif alphanumeric and Greek symbols from the
STIX2 fonts, Copyright © 2001-2016 by the STI Pub Companies (OFL license
1.1), modified slab serif alphanumeric symbols from the Zilla Slab fonts,
Copyright © 2017 The Mozilla Foundation (OFL license 1.1) and modified sans
serif alphanumeric symbols from the Clear Sans font, Copyright © 2012 Intel
Corporation (Apache License 2.0).
The OFL license can be found at: http://scripts.sil.org/OFL.
The Apache license can be found at: http://www.apache.org/licenses/LICENSE-2.0.html.
This file, the documentation and the logix.sty file are distributed and/or
modified under the conditions of the LaTeX Project Public License, either
version 1.3 of this license or (at your option) any later version. The
latest version of this license can be found at:
http://www.latex-project.org/lppl.txt
and version 1.3c or later is part of all distributions of LaTeX version
2005-12-01 or later.
This work has the LPPL maintenance status `maintained'.
The Current Maintainer of this work is Michael Lee Finney who can be reached
at ctan@metachaos.net.
This work consists of the files CHANGELOG, README, logix.sty, logix.tex, logix.pdf,
logix.otf, logix.ttf, logix.woff, logix.woff2, logix.eot and logix.vfc.
To use this package, add
\usepackage{logix}
it has no options. If the array package is used, it must be loaded prior to the
logix package due to a conflict between the array package and the arydshln
package. The public interface is defined in logix.sty and documented in logix.pdf.
For example:
\usepackage{array} % Only if required, must load before logix.
\usepackage{logix} % Load logix font for supplemental symbols.
\setmainfont{STIX Two Text} % AMS STIX2 used for main font.
\setmathfont{STIX Two Math} % AMS STIX2 used for math font.
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