Using \twoheadleftarrow

[pie...@chachatelier.fr]

Hello,

I can use \leftarrow with TeX input for Mathjax, but \twoheadleftarrow reports "Undefined control sequence \twoheadleftarrow"

However, the file MathJax/jax/output/HTML-CSS/fonts/TeX/AMS/Regular/Arrows.js contains a definition fo such a symbol.

What am I doing wrong ?

Regards,

Pierre Chatelier

[Davide Cervone]

Make sure you have included the AMSsymbol extension in your TeX configuration's extensions block.  That is where the \twoheadleftarrow macro is defined.

Davide

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[pie...@chachatelier.fr]

Adding AMSSymbols to extension block was the solution indeed.

Thanks