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Do we have something like \rad for the radical of a polynomial in LaTeX? I am writing in the equation mode within the theorem environment and everything is in italics. If I use \text{rad}, then I get rad in italics. If I use \textrm{rad} I get rad in Times New Roman font. I just want to display it in nonitalic format and in the same font as other parts of the theorem. How can I achieve this?

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closed as too localized by barbara beeton, Werner, Marco Daniel, Xavier, Qrrbrbirlbel May 4 '13 at 22:51

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thanks a lot! \DeclareMathOperator works! –  Jason Ng Apr 17 '13 at 5:56

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