7
votes
2answers
13k views

\Rightarrow with text above it [duplicate]

When using the command \Rightarrow is there any way to put text above it? I have tried \overbrace but is there a way to do it without this?
14
votes
2answers
3k views

How to typeset “evaluated at” vertical bar with two conditions instead of one?

I would like to typeset the differential of a multivariate function evaluated at a point where two of the variables take precise value. I typeset the "evaluated at" using a vertical bar, at the bottom ...