I'm using this

\newcommand\Underset[2]{\underset{\textstyle #1}{#2}} 

so that

\Underset{f \mapsto f\circ \partial_{n} }{\partial^{*}_{n}:Hom(G_{n-1},M)\to Hom(G_{n},M)} 

wouldn't minimize the function under those sets, but now how do I align f under Hom and the row \mapsto under the row \to?

  • 1
    Welcome to TeX SX! Could you please post a small compilable code? – Bernard May 18 '19 at 9:35

I'm not sure what you are looking for but, well, like this?

f &\mapsto f\circ \partial_{n}

enter image description here

  • basically yes, but why do we need to define a math operator? I mean why \DeclareMathOperator{\Hom}{Hom} is needed in order to have an allingment – Davide Trono May 18 '19 at 9:50
  • 1
    @DavideTrono It is not needed to have the alignment. However, it is needed overall. If you write only Hom, I will understand it as H x o x m, i.e. a product of three variables. \DeclareMathOperator makes it in roman font (which is needed) and produces a little space after the operator (which looks nice and is recommended). – user156344 May 18 '19 at 9:53

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.