How would I go about to write in latex (not the PF version, the actual thing) a function? By that, I mean when you go(adsbygoogle = window.adsbygoogle || []).push({});

[tex]f:A\rightarrow B[/tex]

[tex]a\mapsto f(a)[/tex]

but how to write the code so that the arrows are all just right in length?

Thx!

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# Question about latex

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