2

There is an incompatibility with the MTPro Lite and breqn packages that breaks the \implies symbol definition.

At my sample code:

\documentclass{article}

\usepackage[lite,subscriptcorrection,slantedGreek,nofontinfo]{mtpro2}
\usepackage{mathtools}
\usepackage{fixmath}
\usepackage{breqn}

\begin{document}

Let $x\implies y$. Can you see the problem?

\end{document}

Is there any way to fix it?

  • probably not a solution or a duplicate, but it may explain some things: amsmath and amsfonts incompatibility issues. breqn has a lot of compatibility issues. – barbara beeton Apr 22 '17 at 20:31
  • Well, \implies does not appear in the LaTeX manual. – egreg Apr 22 '17 at 22:40
  • On the other hand, also \Longrightarrow breaks. – egreg Apr 22 '17 at 22:59
2

The problem seems to be in that mtpro2 uses a different code for \Relbar than the standard one.

Here's a fix, but I don't know if it breaks something else.

\documentclass{article}

\usepackage[lite]{mtpro2}
\usepackage{amsmath}
\usepackage{breqn}

\AtBeginDocument{%
  \edef\Relbar{\mathord{\mathchar\the\numexpr\Relbar-"3000}}%
}

\begin{document}

$a \Longrightarrow b \Longleftarrow c$

$a \implies b \impliedby c$

\end{document}

enter image description here

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.