{theorems} are environments which are commonly numbered. They are extensively used in math texts. Examples of such environments are theorems, corollaries, lemmas, propositions, remarks and definitions. Popular packages are {amsthm}, {ntheorem}, and {thmtools}. Covers discussion on proofs too.

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cleveref, ntheorem and lj-igpl

The cleveref package doesn't work properly with the lj-igpl package. There are many discussions about cleveref, however, none of them solves my problem. I am using the ntheorem package as well, but ...
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How to create a framed proof attached to a theorem?

I am trying to create a customized "proof" environment attached to a theorem. It looks like this: So there is first the theorem, and then a gray bar starts on the inner margin. It ends, when the ...
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Failure of \text within theorem environment

I have an equation within the statement of one of my theorems. Within this equation, I have some text to name a function. However, when this equation appears within the theorem environment, the ...
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Understanding differences between newtheorem and newenvironment

The difficulty that I am having is that I make a newtheorem: \newtheorem{definition}[theorem]{Definition} It however seems to act nearly the same as with newenvironment: ...
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How to set the bold font of the keyword Definition using IEEEtran without introducing package ntheorem?

I am writing a paper with the recommended template IEEEtran.sty. IEEEtran has its own theorem environment such as definitions, theorems, axioms, corollaries, lemmas, and so on. I want to set the bold ...
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Section with answers created automatically

My question is quite similar to this one, but I think a slightly different approach is needed. I have a document with a lot of exercices and I'd like to add aswers and hints to them in a certain ...
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Custom theorem numbering … and extend to lemma etc

In Custom theorem numbering @egreg provided a way to custome theorem numbering: \documentclass{article} %\usepackage{amsthm} %% uncomment to see the difference \newtheorem{innercustomthm}{Theorem} ...
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Mark end of Theorem

In this answer Palatino text font is used together with the AMS Euler (eulervm) math font. The following statement is reasonable: Note also that because the "Euler" fonts have an upright rather ...
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Faint text after new theorem

This code using \newtheorem produces faint text afterwards. What's the remedy? \documentclass[xcolor=dvipsnames]{beamer} \usetheme[height=9mm]{Rochester} \setbeamertemplate{items}[ball] ...
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How should one format a proof inside a proof, or 'inner proof'

I've come across this a few times and have yet to find a general consensus on how to format a proof inside of a proof. Should there be a proof environment within the proof environment that is ...
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Starting a theorem or a proof with an equation and vertical spacing

Is it bad practice to begin the statement of a theorem or of a proof with an equation? If it is acceptable, what is your opinion on the resulting spacing in the three cases, in the code below? In the ...
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What's the correct way to place theorems and pictures side by side?

Okay so I have a definition using the amsthm theorem environments, and a tikzpicture which I want to see side by side. The material inside the definition is not too big, so I expect the final height ...
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restatables and \listoftheorem

I am using the restatable environment from the thm-restate package ofthmtools. I am also using \listoftheorems command to give me a list of the theorems. However, my restatable theorem is appearing ...
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Hyperlinking theorems in smfart

Edit: The class smfart is one of several classes created by the Société Mathématique de France for typesetting mathematics. Here is its CTAN page, where it lies under smflatex, and here is the ...
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Spacing around thm environments when parskip is changed

I am a beginner with LaTeX and have this probably tyro problem - when I use asmthmpackage environments in combination with \parskip, the (vertical) spacing above and below theorems, definitions, etc ...
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loading mps to pdf converter latex

\documentclass[a4paper,11pt,english,openright]{book} \usepackage[ansinew]{inputenc} \usepackage[english]{babel} \usepackage{babel} \usepackage[T1]{fontenc} \usepackage[centertags]{amsmath} ...
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nopagebreak between rule and custom theorem env

I'm making a custom theorem environment. Here's a minimal example of my problem, with some filler text borrowed from the GPL: \documentclass{scrbook} \usepackage[dvipsnames]{xcolor} ...