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When preparing some manuscript, I noticed it is required that theorem, definition and remark have different formats.

vi) Theorems etc. The words “Theorem”, “Lemma”, “Corollary”, “Proposition” and “Definition” (and their appropriate numerals) are to appear in bold face. The complete body of a theorem, lemma, corollary and proposition is to appear in italics. Only the concept to be defined in a definition is to appear in italics, the rest of the definition being in ordinary print. The words “Proof ”, “Remark”, “Comment”, “Note”, “Example”, etc. are to appear in italics.

I was using \newtheorem{theorem}{Theorem}[section] for all theorems, corollaries, remarks, examples, etc... I was only able to set one style using \theoremstyle{}

Is there a way that I can set different styles for different environments?

Stefan Pinnow
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user3029790
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  • Welcome to TeX.SE. Please tell us if you employ a theorem-creation package such as amsthm or ntheorem. – Mico Aug 13 '19 at 20:25
  • @Mico I'm using the amsthm package – user3029790 Aug 13 '19 at 20:27
  • thmtools can help in defining theorem styles, and it cooperates with amsthm as well as ntheorem. – Bernard Aug 13 '19 at 20:30
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    Please read section 4, entitled "Changing styles for theorem-like environments" of the user guide of the amsthm package? (To open a copy of this user guide in a browser, type texdoc amsthm at a command prompt.) The amsthm package provides three standard theorem styles: plain, definition, and remark. Use\theoremstyle{...} to switch among theorem styles. In addition, if you're not satisfied with existing theorem styles, you could use the \newtheoremstyle macro to create new theorem styles; see subsection 4.3 on p. 9 of the user guide for more about \newtheoremstyle. – Mico Aug 13 '19 at 20:32
  • Potential duplicate, at least regarding italic vs. upright text: Non italic text in theorems, definitions, examples – barbara beeton Aug 13 '19 at 22:03

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