How can I write a double expression below de comand \argmin for explain the range of two variables
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How can I write a double expression below de comand \argmin for explain the range of two variables
\DeclareMathOperator{\argmin}{arg\,min}in your preamble, use\argmin_{\substack{x\in X\\y\in Y}}in your document. See https://tex.stackexchange.com/a/80461/4427 – egreg Mar 11 '20 at 16:54