Using the command \displaystyle \lim_{\Lambda \uparrow \mathbb{Z}^2} I can produce the limit that I desire. But I like to write the above limit as in the photo below. Could you help me? Thanked.

Ps. Correct me if I'm wrong about the Tags.

enter image description here


Use \DeclareMathOperator*:


  \limweak_{\Lambda \uparrow Z^2}

Try using \substack. (You will need to load the amsmath package):

$\substack{\mathrm{limweak}\\[0.1ex]\Lambda\uparrow Z}$

You can even define a command that takes as an argument the limit:


P.S.: You can modify the height (0.1ex) to suit your needs.

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