Mathematics Edu - Box style in #latex \documentclass{book} \usepackage{amsmath} \usepackage{cleveref} \usepackage[most]{tcolorbox} \newtcbtheorem[number within=chapter]{Theorem}{}{ enhanced, sharp corners, attach boxed title to top left={ xshift=-1mm ...
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Fancy boxes for theorem, lemma, and proof with mdframed – texblog