{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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9
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2answers
7k views

Spacing before and after with \newtheoremstyle

I want to define my own theorem style for examples. I want them to be numbered the same way as theorems (so Example 2.4 follows Theorem 2.3); I want them to be formatted exactly the same as theorems ...
9
votes
2answers
4k views

Common, per-section numbering of theorems, lemmas etc.

I use amsthm for my theorems, lemmas etc. I'd like their numbering to look like that: Theorem 1.1.1 Lemma 1.1.2 Definition 1.1.3 Theorem 1.2.1 Definition 1.2.2 Corollary 1.2.3 Theorem 2.1.1 etc. ...
6
votes
2answers
433 views

Spacing for \listtheorems in ntheorem

Q: How do I get my theorem number and name to not overlap each other in my list of theorems? This is basically the same question as "Spacing control for listtheorems". But the solutions mentioned ...
5
votes
2answers
2k views

How can I get a line break in a theorem headline?

I have a theorem title, which is longer then the page width. How do I get the title in two lines? \begin{theorem}[this title is to long for one line] the theorem \end{theorem}
1
vote
1answer
384 views

Customizing list of theorems

Is it possible to avoid brackets surrounding the name of a theorem in the \listoftheorems from package thmtools? And if so, how do I do that?
1
vote
1answer
500 views

How to suppress vertical space between proof environment heads and itemize environments?

The user 'egreg' recently helped me to suppress vertical space between theorem heads and enumitem environments (such as itemize; see the link below). I now have a similar problem: When a proof ...
22
votes
2answers
9k views

Custom theorem numbering

This one should be easy for the gurus… Suppose I want to define a theorem environment which has a custom numbering scheme. That is, instead of being numbered according to some counter, it is numbered ...
16
votes
5answers
1k views

How to put a star (or other symbol) in sections that are “special” (difficult, optional, etc)?

I'm currently writing a book, and I'd like some of the sections to be clearly marked as "difficult" or "optional". Not only sections, but also exercises (I'm using the exercise package) and theorems ...
36
votes
2answers
36k views

Theorem without numbering

Is it possible to have single theorems without numbering? I would like to be able to switch them off individually with asterisk-* or have a nono-theorem environment. \newtheorem{theorem}{Theorem} ...
15
votes
2answers
31k views

Solid black box in the proof environment

I am using \documentclass[12pt]{article} \usepackage{amsmath} \usepackage{amssymb} \usepackage{amsthm} \begin{document} \begin{proof} A = B \end{proof} \end{document} and an empty square box ...
11
votes
2answers
2k views

Wrong spacing before theorem environment (amsthm)

I am using the amsthm package to have environment. I also use \usepackage[onehalfspacing]{setspace} to have 1.5 line spacing. However, when I use the the theorem environment, the spacing before is ...
25
votes
5answers
4k views

How to prevent paragraph breaks after theorem environments?

By default, the list environments (such as itemize) have the nice property that if you add a blank line after it, it starts a new paragraph, and if you don't, the paragraph continues. So The ...
23
votes
5answers
16k views

Changing style of Proof

I'm using the \begin{proof} of the amsthm package. And I want to change the style of the Proof word that is added in the beginning. By default it is italic, I want to make it bold. How can I do it?
10
votes
3answers
4k views

A theoremstyle with complete indentation using amsthm

I want to define a theoremstyle using amsthm, such that the complete environments content produced by \newtheorem with this style are indented. The following standalone example uses an adapted ...
7
votes
1answer
2k views

Theorem formatting

\theoremstyle{remark} \newtheorem{example}{Example} Then: \begin{example} Some text \end{example} Output is: Example 1. Some text What is the way to automatically obtain without indent: ...
15
votes
1answer
9k views

How can one cite theorems of references?

I would like to cite the item (iii) of proposition 3 of a reference. How can I do it? Which ways do you suggest? This is a question not only about LaTeX, but also about style. One option I have seen ...
11
votes
2answers
10k views

Allow theorem split in many frames in beamer

How can a theorem-like environment be (automatically) split into multiple frames if the vertical space it needs is not enough in a frame? In my document preamble I have \theoremstyle{definition} ...
4
votes
1answer
285 views

Examples enumerated in the margins

I am writing a paper about phonetics that contains lots of examples, usually organised in tables. What I would like is to have these examples enumerated in the margins. Specifically, I need an ...
16
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3answers
1k views

Cleveref and named theorems

Is it possible with Cleverref to reference not only the number of an environment but the "name" (the thing that is passed to it in square brackets? In the following example I want to replace the line ...
11
votes
4answers
6k views

Theorem environment with hanging indentation

I would like to define a theorem environment with custom layout. In particular, I want the body of the theorem to be indented, like this Text body. Text body. Text body. Theorem 1 (Pythagoras). ...
7
votes
2answers
219 views

How do I make all the theorem-alike environments have an ending symbol?

I have a question about making an ending symbol. It is a LaTex-default that every proof environment has an ending symbol. I want to make every theorem-alike environment such as the example ...
6
votes
2answers
3k views

Babel (French) does not translate the theorem environment in Beamer class

I'm using the beamer class, with the following preamble: \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage[french]{babel} \usepackage{ae,aecompl,aeguill} \usepackage{amsthm, amsmath, ...
5
votes
2answers
224 views

Hide content to show later

My question appeared about this egreg's answer: http://tex.stackexchange.com/a/210564/15256 I have a list of exercise-answers but I don't want to show the answers immediately but after till I'll pull ...
4
votes
2answers
1k views

ntheorem environment with indentation

Considering this post theorem environment with hanging indentation and Stefan's answer, I'd be interested in the same approach with ntheorem. I've been through the .sty file but I have hard time ...
14
votes
1answer
12k views

Theorem numbering as chapter.section.subsection.theorem number

This might be a simple question but it's weird that I couldn't find the answer anywhere on the internet. If I set as \newtheorem{-}{-}[section] then I get the numbering as Theorem ...
10
votes
2answers
2k views

QED symbol in a custom theorem environment

I have created my own theorem environment like this \newtheoremstyle{mythmstyle}{}{}{}{}{\scshape}{.}{ }{} \theoremstyle{mythmstyle} \newtheorem{mythm}{Theorem} How do I add the QED symbol (the ...
8
votes
1answer
4k views

Numbering theorems within chapters

I've recently asked a question: Chapters in TeX regarding working with chapters in tex. I have since learned that I must use documentclass report for the purposes of my document. However, now all of ...
7
votes
4answers
111 views

Cross-reference two numbered environments

Consider the following code: \documentclass[a4paper,12pt]{book} \usepackage{amsthm} \usepackage{hyperref} \theoremstyle{plain} \newtheorem{exercise}{Exercise} \newtheorem{solution}{Solution} ...
7
votes
2answers
222 views

Using `environ` to make a list of environments?

In my document I use an amsthm environment called question, which I use to, well, pose questions to myself for later reference. However, they are spread out in the text. I know ntheorem has a ...
6
votes
1answer
213 views

Different numbering scheme per chapter [duplicate]

I would like to change the numbering scheme for my theorems per chapter. That's because I have smaller and bigger chapters. Bigger chapters need subsections for proper structuring, and so my theorems ...
6
votes
3answers
2k views

How to remove brackets from the optional title in amsthm?

This is a follow-up question of this question. when using \begin{theorem}[Open mapping]...\end{theorem}, I received Is it possible to change the format into "Theorem: Open Mapping."(boldface)? ...
6
votes
1answer
818 views

Overfull \hbox produced by ntheorem subtitles

I switched from using the standard AMS theorem package to ntheorem so I can put alternative end marks on theorem environments (I want my examples to have an end mark, but not the same one as proofs). ...
5
votes
2answers
265 views

List of short problem names?

I typeset a book with problems and solutions. I need to get a list of short problem names. I expected there will be a way similar to pitcures: \caption[Figure name for List of Figures]{Caption name} ...
5
votes
1answer
667 views

Spacing (numwidth) control for listtheorems

I am using the \listtheorems command from ntheorem to generate a list of theorems for a document. However, because I number the theorems inside sections, the theorem number is a bit on the long side, ...
5
votes
2answers
522 views

Numbering theorems within the innermost sectioning environment present at that point in the document?

Here is what I am trying to achieve: Chapter 1. ... Theorem 1.1. ... Section 1.1. ... Theorem 1.1.1. ... Subsection 1.1.1. ... Theorem 1.1.1.1. Is this even possible? If so, how? ...
5
votes
2answers
1k views

thmtools: How to prevent pagebreak between theorem and proof?

I am using thmtools to format a collection of theorems and their proofs. Is there any way to prevent a pagebreak from happening between the last line of a theorem statement and the first line of the ...
4
votes
1answer
582 views

Remove blank page between Acknowledgements and Table of Contents?

I get a blank page between “Acknowledgement” and “Table of contents”. How can I remove it? I used a template from somewhere. The preamble is as follows: \documentclass[openany,12pt]{ubthesis} ...
4
votes
2answers
621 views

How to configure theorems depending on the document class?

I would like to have \newtheorem{teo}{Teorema}[chapter] if the book class is loaded but \newtheorem{teo}{Teorema}[section] if the article class is loaded. Can I do this with some sort of ...
3
votes
1answer
589 views

Endmarks not showing up, thmmarks, ntheorem

I can't get thmmarks in ntheorem to work in Latex. I've tried searching around the web, and I can't figure out what I'm doing wrong. I suspect there's something simple I'm missing. Here's a sample ...
2
votes
2answers
1k views

Theorem formatting: strange interaction with itemize

This question is related to this one. I want to have theorem headers alone on a line like this: Theorem 1. some text... In the amsthm documentation, they suggest doing this: ...
10
votes
1answer
853 views

How to customise (e.g. make thicker) the end-proof symbol in Beamer?

I would like to change the symbol for the end of proofs (the square) used in Beamer. It is quite thin, not very visible in some colorthemes. How can I have a thicker border and still in the structure ...
8
votes
4answers
314 views

Why doesn't this code combining \foreach with \newtheorem work?

Here is an example document. \documentclass[a4paper]{amsart} \usepackage{tikz} \theoremstyle{definition} \newtheorem{baseTheorem}{Base Theorem}[section] \foreach \x in ...
8
votes
1answer
900 views

Margins for proof environment

The code below is (almost) the proof environment of amsthm: \newenvironment{proof}[1][\proofname]% {% \par\pushQED{\qed}\normalfont\topsep6\p@\@plus6\p@\relax% ...
7
votes
1answer
564 views

'List of theorems', translated into my language

I'm using \listoftheorems (part of the thmtools package) to show a list of all my theorems. It works really well, but it prints "List of theorems" in English; I would obviously prefer it to be in my ...
6
votes
1answer
382 views

Theorem starting with a list

I want a robust way to handle theorems which starts by a list environment, with the first item being on a new line. I don't want to distinguish between theorems with lists and those without by using ...
5
votes
1answer
192 views

Only show \NAME in \listoftheorems

I am using the thmtools package, and I want to modify \listoftheorems to only print the name of the theorem. For example, my document might look something like the one shown below. When I compile this ...
5
votes
2answers
1k views

`ntheorem` and `thmtools` seem incompatible

I am preparing the setup of the theorem environments for my thesis. I want to do this right before I have say 200 of those environments in my document, since changing them will likely break things at ...
5
votes
2answers
1k views

How to make equations, figures and theorems use the same numbering scheme

It was asked a while ago how to make equation use the same counter as a theorem for example and one solution was to make the theorem counter use the equation instead by using ...
4
votes
1answer
255 views

\newtheorem{def} throws an error

The following is a piece of the code I am working on. It says that there is an error with \newtheorem{def} but I really don't understand why. Thank you very much for your help! ...
4
votes
1answer
2k views

beamer: Different numbering for Theorems, Examples, Definition, and Lemma

I want to have different numbering for Theorems, Examples, Definition, and Lemma. I use the following code in preamble \setbeamertemplate{theorem}[ams style] \setbeamertemplate{theorems}[numbered] ...