# Which latex character is this?

I am trying to find out which latex character I should use to produce this X:

I tried using this web-site but couldn't find the exact same thing. http://detexify.kirelabs.org/classify.html

My best guesses are:

\chi
\mathcal{X}


but both of them are different than the image.

UPDATE:

When I try to build,

\documentclass{article}
\DeclareMathAlphabet{\mathpzc}{OT1}{pzc}{m}{it}
\begin{document}

$\mathpzc{X}$

\end{document}


I get the following error,

Saits-MacBook-Pro:Desktop sait$pdflatex a.tex This is pdfTeX, Version 3.14159265-2.6-1.40.15 (TeX Live 2014) (preloaded format=pdflatex) restricted \write18 enabled. entering extended mode (./a.tex LaTeX2e <2014/05/01> Babel <3.9k> and hyphenation patterns for 21 languages loaded. (/usr/local/texlive/2014basic/texmf-dist/tex/latex/base/article.cls Document Class: article 2007/10/19 v1.4h Standard LaTeX document class (/usr/local/texlive/2014basic/texmf-dist/tex/latex/base/size10.clo)) No file a.aux. (/usr/local/texlive/2014basic/texmf-dist/tex/latex/psnfss/ot1pzc.fd) kpathsea: Running mktextfm pzcmi7t /usr/local/texlive/2014basic/texmf-dist/web2c/mktexnam: Could not map source abbreviation for pzcmi7t. /usr/local/texlive/2014basic/texmf-dist/web2c/mktexnam: Need to update ? mktextfm: Running mf-nowin -progname=mf \mode:=ljfour; mag:=1; nonstopmode; input pzcmi7t This is METAFONT, Version 2.7182818 (TeX Live 2014) (preloaded base=mf) kpathsea: Running mktexmf pzcmi7t ! I can't find file pzcmi7t'. <*> ...=ljfour; mag:=1; nonstopmode; input pzcmi7t Please type another input file name ! Emergency stop. <*> ...=ljfour; mag:=1; nonstopmode; input pzcmi7t Transcript written on mfput.log. grep: pzcmi7t.log: No such file or directory mktextfm: mf-nowin -progname=mf \mode:=ljfour; mag:=1; nonstopmode; input pzcmi7t' failed to make pzcmi7t.tfm. kpathsea: Appending font creation commands to missfont.log. ! Font OT1/pzc/m/it/10=pzcmi7t at 10.0pt not loadable: Metric (TFM) file not fo und. <to be read again> relax l.5$\mathpzc{X}
$?  PS: It seems I already got psnfss package. Saits-MacBook-Pro:~ sait$ sudo tlmgr install psnfss
tlmgr: package repository http://mirrors.rit.edu/CTAN/systems/texlive/tlnet
tlmgr install: package already present: psnfss

• Which font did you use it for your proofs? – Aradnix Jun 18 '15 at 6:04
• I am not sure. I am simply doing $\chi$, etc. – Sait Jun 18 '15 at 6:06
• Rather than $\chi$ it is much closer to $\mathcal{X}$. I suspect that it is an X in a particular font. – user30471 Jun 18 '15 at 6:07
• They both not quite same with the given image, as I said. – Sait Jun 18 '15 at 6:10
• It is the Chancery font or TeX Gyre Chorus: fontspace.com/gust-e-foundry/texgyrechorus – user2478 Jun 18 '15 at 6:47

It is an X in the mathpzc font:

\documentclass{article}
\DeclareMathAlphabet{\mathpzc}{OT1}{pzc}{m}{it}
\begin{document}

$\mathpzc{X}$

\end{document}

• I get an error: I can't find file 'pzcmi7t'. Should I need to install a library? – Sait Jun 18 '15 at 6:16
• @Sait It sounds like you need to install the pnsfss fonts. If you are using TeXLive then you can do this from the TeX Live Utility. – user30471 Jun 18 '15 at 6:58
• thanks. Can you please check my updated question? – Sait Jun 18 '15 at 8:33
• @Sait You should post this as a follow-up question. – user30471 Jun 18 '15 at 9:46