[Tex/LaTex] How to restore LaTeX standard font for math equations in a sty file

Question

I am using the style file for classic thesis, which can be downloaded in this link and can be viewed in this link. I like everything about this style file except the font used for math equations. How can I modify the classicthesis.sty such that math equations are printed the same as the standard LaTeX math?

Answer 1

This is what I get from this simple example:

\documentclass[11pt,a5paper,footinclude=true,headinclude=true]{scrbook}
\usepackage[T1]{fontenc}
\usepackage[linedheaders,parts,pdfspacing]{classicthesis}
\begin{document}
This is inline math $a+b=c$ and a displayed formula follows:
\[
\int_{-\infty}^{\infty}e^{-x^2}\,dx=\sqrt{\pi}
\]
\end{document}

The font used for math is MathPaZo, which is tailored to accompany the default Palatino text font.

If I change the example in the following way

\documentclass[11pt,a5paper,footinclude=true,headinclude=true]{scrbook}
\usepackage[T1]{fontenc}
\usepackage[linedheaders,parts,pdfspacing,eulermath]{classicthesis}
\begin{document}
This is inline math $a+b=c$ and a displayed formula follows:
\[
\int_{-\infty}^{\infty}e^{-x^2}\,dx=\sqrt{\pi}
\]
\end{document}

(note the eulermath option), I get Euler Math for the formulas.

If instead you load lmodern after classicthesis

\documentclass[11pt,a5paper,footinclude=true,headinclude=true]{scrbook}
\usepackage[T1]{fontenc}
\usepackage[linedheaders,parts,pdfspacing]{classicthesis}
\usepackage{lmodern}
\begin{document}
This is inline math $a+b=c$ and a displayed formula follows:
\[
\int_{-\infty}^{\infty}e^{-x^2}\,dx=\sqrt{\pi}
\]
\end{document}

you get the "standard" LaTeX fonts