theorem - Latex- Lemma shows black rectangle at the end - Stack Overflow
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 ...