12 files changed, 81 insertions, 9 deletions
diff --git a/Master/texmf-dist/doc/fonts/newtx/README b/Master/texmf-dist/doc/fonts/newtx/README
index cc5114acc39..53af5b441a5 100644
--- a/Master/texmf-dist/doc/fonts/newtx/README
+++ b/Master/texmf-dist/doc/fonts/newtx/README
@@ -1,10 +1,17 @@
 This package, initially based on txfonts, provides many fixes and enhancements to the txfonts package, splitting it into two separate packages---newtxtext and newtxmath, which may be run independently of one another. It provides scaling, improved metrics, and other options. In particular, newtxmath offers a libertine option which substitutes Linux Libertine (provided with TeXLive and MikTeX) italic and Greek letters for the default Times letters, providing a good match for the Libertine text font, which is heavier than Computer Modern but lighter than Times, and in my experience, looks very sharp and clear on the screen.
 
-Current version: 1.452 2015-08-08
+Current version: 1.46 2015-08-29
 
 This material is subject to the LaTeX Project Public License. See http://www.ctan.org/license/lppl1.3
 for the details of that license.
 
+Changes in version 1.46
+There are several changes to newtxmath, all related to its subscript rendering.
+(i) A new option, nonewtxmathopt, prevents the use of optical sizes for mathematical subscripts. This can in some cases improve the rendering in cases where spacing is problematic.
+(ii) Inspired by the subscriptcorrection option in mtpro2, a similar option is now available in newtxmath. It is designed for use only when Times math fonts are being used. 
+(iii) The optical sizes in newtxmath (Times) have been refined to work around some spacing issues.
+(iv) A new option, scalesubdrop, changes the fontdimens sigma_16 and sigma_17 by a multiplicative factor. E.g., scalesubdrop=1.4 will change the drop of the subscript to 40% more than its default value.
+
 Changes in version 1.452
 Modified encoding files for T1 and LY1 so that << and >> ligatures work as expected.
 
diff --git a/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi15.tfm b/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi15.tfm
index 1795c53be72..2a8078634f7 100644
--- a/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi15.tfm
+++ b/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi15.tfm
diff --git a/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi17.tfm b/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi17.tfm
index 68d35769de5..50d5dae1587 100644
--- a/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi17.tfm
+++ b/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi17.tfm
diff --git a/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi5.tfm b/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi5.tfm
index 8d36fd656d1..70a30fbde73 100644
--- a/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi5.tfm
+++ b/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi5.tfm
diff --git a/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi7.tfm b/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi7.tfm
index 258196d1dd4..433f87cfb71 100644
--- a/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi7.tfm
+++ b/Master/texmf-dist/fonts/tfm/public/newtx/ntxmi7.tfm
diff --git a/Master/texmf-dist/fonts/vf/public/newtx/ntxmi15.vf b/Master/texmf-dist/fonts/vf/public/newtx/ntxmi15.vf
index 4491a21ed3f..2fd0890c570 100644
--- a/Master/texmf-dist/fonts/vf/public/newtx/ntxmi15.vf
+++ b/Master/texmf-dist/fonts/vf/public/newtx/ntxmi15.vf
diff --git a/Master/texmf-dist/fonts/vf/public/newtx/ntxmi17.vf b/Master/texmf-dist/fonts/vf/public/newtx/ntxmi17.vf
index f050c19e903..044f372501c 100644
--- a/Master/texmf-dist/fonts/vf/public/newtx/ntxmi17.vf
+++ b/Master/texmf-dist/fonts/vf/public/newtx/ntxmi17.vf
diff --git a/Master/texmf-dist/fonts/vf/public/newtx/ntxmi5.vf b/Master/texmf-dist/fonts/vf/public/newtx/ntxmi5.vf
index 8c79410f98a..9f3e6544a42 100644
--- a/Master/texmf-dist/fonts/vf/public/newtx/ntxmi5.vf
+++ b/Master/texmf-dist/fonts/vf/public/newtx/ntxmi5.vf
diff --git a/Master/texmf-dist/fonts/vf/public/newtx/ntxmi7.vf b/Master/texmf-dist/fonts/vf/public/newtx/ntxmi7.vf
index d342872cb04..4f193fdd49d 100644
--- a/Master/texmf-dist/fonts/vf/public/newtx/ntxmi7.vf
+++ b/Master/texmf-dist/fonts/vf/public/newtx/ntxmi7.vf
diff --git a/Master/texmf-dist/tex/latex/newtx/newtxmath.sty b/Master/texmf-dist/tex/latex/newtx/newtxmath.sty
index e136dacdb58..3ea9457e135 100644
--- a/Master/texmf-dist/tex/latex/newtx/newtxmath.sty
+++ b/Master/texmf-dist/tex/latex/newtx/newtxmath.sty
@@ -10,8 +10,8 @@
 % of glyph collisions.
 % These modifications are by Michael Sharpe, msharpe at ucsd dot edu
 
-\def\fileversion{1.452}
-\def\filedate{2015/08/08}
+\def\fileversion{1.46}
+\def\filedate{2015/08/29}
 \ProvidesPackage{newtxmath}[\filedate\space v\fileversion]
 \@ifundefined{newtxmathLoaded}{}{\endinput}
 
@@ -28,6 +28,7 @@
   \xl@otftrue
   \fi
 \fi
+\newif\iftx@noopt
 \newcommand{\cmr@default}{cmr}
 \def\ly@one{LY1}
 \def\t@one{T1}
@@ -36,6 +37,8 @@
 \input{binhex}
 \let\ntxmath@scaled\@empty
 \define@key{ntxmath}{scaled}[1.0]{\def\ntxmath@scaled{s*[#1]}}
+\define@key{ntxmath}{scalesubdrop}[1.0]{\DeclareRobustCommand{\ntx@scalesub}{%
+\fontdimen16\font=#1\fontdimen16\font\fontdimen17\font=#1\fontdimen17\font}}
 \DeclareOption*{%
   \begingroup
   \edef\x{\endgroup
@@ -60,6 +63,10 @@
 \tx@ottrue % default is true
 \let\rmdefaultB\rmdefault 
 \ifx\tx@rmdefault\@tx@ptm \def\rmdefaultB{ntxtlf}\fi % newtxtext
+\newcommand\enablesbcorrection{\AtBeginDocument{\mathcode`\_=\string"8000 \catcode`\_=12\relax}}
+\newcommand\disablesbcorrection{\catcode`\_=8\relax}
+\DeclareOption{nosubscriptcorrection}{\disablesbcorrection}
+\DeclareOption{subscriptcorrection}  {\enablesbcorrection}
 \DeclareOption{timesmathacc}{\tx@tmatrue}
 \DeclareOption{bigdelims}{\tx@bigdelimstrue}
 \DeclareOption{varbb}{\tx@varbbtrue}
@@ -89,8 +96,10 @@
 \DeclareOption{largelibfigs}{\tx@largelibfigstrue}
 \DeclareOption{liby}{\tx@libytrue}
 \DeclareOption{frenchmath}{\tx@frenchmtrue}
+\DeclareOption{nonewtxmathopt}{\tx@noopttrue}
+\DeclareOption{scale}{\tx@noopttrue}
 \ExecuteOptions{%
-amssymbols,uprightGreek}
+amssymbols,uprightGreek,nosubscriptcorrection}
 \ProcessOptions*      
 % frenchmath implies uprightGreek
 \iftx@frenchm\tx@slantedGfalse\fi
@@ -311,7 +320,38 @@ amssymbols,uprightGreek}
 
 \def\equalht#1{\tx@XXX #1\@nil}
 
-
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% Subscript correction code
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begingroup
+ \catcode`\_=13
+ \gdef_{\futurelet\next\s@@b}
+\endgroup
+\def\s@@b{\ifcat\relax\noexpand\next\expandafter\sb\else
+ \expandafter\s@@b@\fi}
+\def\s@@b@#1{\sb{\futurelet\next\sb@#1}}
+\def\sb@{%
+ \ifx\next\space@\def\next@. {\futurelet\next\sb@}\else
+  \def\next@.{%
+   \ifx\next f\mkern-\tw@ mu\else
+   \ifx\next j\mkern-\tw@ mu\else
+   \ifx\next p\mkern-\@ne mu\else
+   %\ifx\next t\mkern\@ne mu\else
+   \ifx\next y\mkern-\@ne mu\else
+   \ifx\next A\mkern-\tw@ mu\else
+   \ifx\next B\mkern-\@ne mu\else
+   \ifx\next D\mkern-\@ne mu\else
+   \ifx\next H\mkern-\@ne mu\else
+   \ifx\next I\mkern-\@ne mu\else
+   \ifx\next K\mkern-\@ne mu\else
+   \ifx\next L\mkern-\@ne mu\else
+   \ifx\next M\mkern-\@ne mu\else
+   \ifx\next N\mkern-0.5mu\else
+   \ifx\next P\mkern-\@ne mu\else
+   \ifx\next X\mkern-\@ne mu\else
+   \fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}%
+ \fi
+ \next@.} 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % Math Symbols & Notations Definitions
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
diff --git a/Master/texmf-dist/tex/latex/newtx/newtxtext.sty b/Master/texmf-dist/tex/latex/newtx/newtxtext.sty
index d3d38bf062e..c14667f8169 100644
--- a/Master/texmf-dist/tex/latex/newtx/newtxtext.sty
+++ b/Master/texmf-dist/tex/latex/newtx/newtxtext.sty
@@ -1,7 +1,7 @@
 \NeedsTeXFormat{LaTeX2e}
 
-\def\fileversion{1.452}
-\def\filedate{2015/08/08}
+\def\fileversion{1.46}
+\def\filedate{2015/08/29}
 \ProvidesPackage{newtxtext}[\filedate\space v\fileversion]
 
 \message{`newtxtext' v\fileversion, \filedate\space Text macros taking advantage of TeX-Gyre Termes fonts (msharpe)}
diff --git a/Master/texmf-dist/tex/latex/newtx/omlntxmi.fd b/Master/texmf-dist/tex/latex/newtx/omlntxmi.fd
index ba411f516c7..38a38956e4e 100644
--- a/Master/texmf-dist/tex/latex/newtx/omlntxmi.fd
+++ b/Master/texmf-dist/tex/latex/newtx/omlntxmi.fd
@@ -4,15 +4,28 @@
 
 %THIS FILE SHOULD BE PUT IN A TEX INPUTS DIRECTORY
 \ProvidesFile{omlntxmi.fd}
-   [2012/03/22 Fontinst v1.933 font definitions for OML/ntxmi.]
+   [2015/08/25 Fontinst v1.933 font definitions for OML/ntxmi.]
 
 \expandafter\ifx\csname ntxmath@scaled\endcsname\relax
   \let\ntxmath@scaled\@empty%
 \fi
+\def\tx@donoopt{\newif\iftx@noopt}
+\expandafter\ifx\csname tx@nooptfalse\endcsname\relax
+  \tx@donoopt
+\fi
 
 \DeclareFontFamily{OML}{ntxmi}{\skewchar\font127 }
 
+
 \ifx\X@s@v@rg\undefined
+\iftx@noopt % no optical sizes
+\DeclareFontShape{OML}{ntxmi}{m}{it}{
+   <-> \ntxmath@scaled ntxmi
+}{}
+\DeclareFontShape{OML}{ntxmi}{b}{it}{
+   <-> \ntxmath@scaled ntxbmi
+}{}
+\else % optical sizes
 \DeclareFontShape{OML}{ntxmi}{m}{it}{
    <-6.3> \ntxmath@scaled ntxmi5
    <6.3-8.6> \ntxmath@scaled ntxmi7 % from 6.3 up to, but not including, 8.6
@@ -23,6 +36,15 @@
    <6.3-8.6> \ntxmath@scaled ntxbmi7 % from 6.3 up to, but not including, 8.6
    <8.6-> \ntxmath@scaled ntxbmi%
 }{}
+\fi %tx@noopt
+\else %\X@s@v@rg is defined
+\iftx@noopt
+\DeclareFontShape{OML}{ntxmi}{m}{it}{
+   <-> \ntxmath@scaled ntxmi1
+}{}
+\DeclareFontShape{OML}{ntxmi}{b}{it}{
+   <-> \ntxmath@scaled ntxbmi1
+}{}
 \else
 \DeclareFontShape{OML}{ntxmi}{m}{it}{
    <-6.3> \ntxmath@scaled ntxmi15
@@ -34,7 +56,10 @@
    <6.3-8.6> \ntxmath@scaled ntxbmi17 % from 6.3 up to, but not including, 8.6
    <8.6-> \ntxmath@scaled ntxbmi1%
 }{}
-\fi
+\fi %tx@noopt
+\fi %\X@s@v@rg
+
+
 \DeclareFontShape{OML}{ntxmi}{l}{it}{<->ssub * ntxmi/m/it}{}
 \DeclareFontShape{OML}{ntxmi}{bx}{it}{<->ssub * ntxmi/b/it}{}