6

While testing the STIX 2.0 fonts with unicode-math, I got a very strange \varkappa in bold italic font. Here it is a quick example:

\documentclass{article}
%\usepackage{luaotfload}  %% only active when using LuaTeX
\usepackage{unicode-math}
\setmathfont{STIX2Math.otf}

\begin{document}
\[
\symup{\varkappa} \quad
\symit{\varkappa} \quad
\symbfup{\varkappa} \quad
\symbfit{\varkappa}
\]
\end{document}

which gives

enter image description here

Why this could happen? (I'm using TeXStudio 2.11.2 on Windows 10. The result is the same either using XeTeX or LuaTeX.)

6
  • 1
    looks like a bug to me, you could report it to stix.. Dec 5 '16 at 23:17
  • Apparently, they put the wrong glyph at slot U+1D752 MATHEMATICAL BOLD ITALIC KAPPA SYMBOL. It's correct in STIX Math. The symbol looks like a KOPPA.
    – egreg
    Dec 5 '16 at 23:19
  • I'm using the STIX Math font, though...
    – TeoFed89
    Dec 5 '16 at 23:21
  • @egreg meant it was correct in the original Stix, this is a new bug introduced in v2 Dec 5 '16 at 23:31
  • I added a ticket at sourceforge.net/p/stixfonts/tracking/79
    – egreg
    Dec 6 '16 at 10:15
4

It's a wrong glyph in slot U+1D752 MATHEMATICAL BOLD ITALIC KAPPA SYMBOL (possibly somebody mistook KOPPA for KAPPA).

Until the bug is fixed, you can get away with the symbol from STIX Math version 1.

\documentclass{article}
\usepackage{unicode-math}
\setmathfont{STIX Two Math}
\setmathfont[range="1D752]{STIX Math}

\begin{document}
\[
\symup{\varkappa} \quad
\symit{\varkappa} \quad
\symbfup{\varkappa} \quad
\symbfit{\varkappa}
\]
\end{document}

enter image description here

1
  • 2
    +1 for recognising the koppa, although it's easier for you as you no doubt recall the original Phoenician. Dec 5 '16 at 23:40

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