[texhax] \mid Description

Philip G. Ratcliffe philip.ratcliffe at fastwebnet.it
Tue Nov 10 22:13:28 CET 2009

> What does the \mid macro do in the below line, that's to say, what 
> visual effect does it, well, effect?
> \[(a_1 \to P_1 \mid \ldots \mid a_n \to P_n) \]

A vertical line like \vert or |, but with equal spacing on either side so
that it looks better in the middle of an expression.

Cheers,  Phil

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