[Tex/LaTex] How to label \rightleftarrows above and below


How can I label $\rightleftarrows$ above the top arrow and below the bottom arrow?

Best Answer

I don't know which package defines \rightleftarrows but this shows how to get labels over and under one of the standard arrows.

Edit updated to use the requested arrow




\[a \mathrel{\mathop{\rightleftarrows}^{\mathrm{over}}_{\mathrm{under}}} b\]


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