[luatex] lualatex with mathversion based on different text font with text font italic variables

[Kunchitapadam, Baskaran (TNQ Software)]

Hi Team

In LuaLaTeX, I have change title font "lmroman10-bold". The math 
variables "a" and "b" comes "latinmodern-math.otf". If I change 
mathversion to "bold" but not comes "bold italic".Is it possible to 
change automatically bolditalic either "latinmodern-math.otf" or 
"lmroman10-bolditalic". Is it possible to change the mathvariables 
[A-Za-z] to running text font italic by using unicode-math.sty. By using 
range, then the last \mathversion is working globally.



\documentclass{article}
\usepackage{fontspec}
\usepackage{unicode-math}
\setmathfont[version=normal]{latinmodern-math.otf}
\setmathfont[version=bold]{latinmodern-math.otf}
\makeatletter
\def\@maketitle{%
   \newpage
   \null
   \vskip 2em%
   \begin{center}%
   \let \footnote \thanks
     {\LARGE\mathversion{bold}\bfseries \@title \par}%
     \vskip 1.5em%
     {\large
       \lineskip .5em%
       \begin{tabular}[t]{c}%
         \@author
       \end{tabular}\par}%
     \vskip 1em%
     {\large \@date}%
   \end{center}%
   \par
   \vskip 1.5em}
\makeatother
\begin{document}
\title{This is $a+b=\alpha+\beta$ article title}
\author{Test $a+b=\alpha+\beta$}
\maketitle
\end{document}

Thanks and regards
Baskaran NK
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