Questions tagged [theorems]

{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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Beamer newtheorem translation

Consider the following MWE: \documentclass{beamer} \usepackage{lmodern} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage[spanish]{babel} \uselanguage{Spanish} \languagepath{Spanish} ...
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2answers
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How to change the font size of all theorem environments?

I have several theorem environments: \newtheorem{theorem}{Theorem} \newtheorem{definition}{Definition} \newtheorem{proposition}{Proposition} etc. and I want to change them so that they all use "...
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1answer
2k views

Enumeration in theorem environment

I am puzzled with a formating question. I was asked to change that the enumeration gives me italic numbers in the theorem environment to non-italic ones. How can customize enumeration, such that it ...
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3answers
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What’s the most straightforward way to typeset theorems etc. when the numbering is entirely manual?

I’m using LaTeX to typeset some homework, and since we’re assigned problems scattered throughout our textbook I have to enter the problem number for each problem I typeset. I’d like these problems to ...
7
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2answers
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Transitioning to mathtools - environment proof undefined

I am new to LaTeX and I was using the amsthm package in order to write proofs by using the proof environment: \documentclass{book} \usepackage{amsthm} \newtheorem{theorem}{Theorem} \begin{document} ...
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4answers
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Two math sections of the same type in a row?

Whenever I try to create two sections of the same type in a row LyX unites them as if they were one. I write a definition, press ENTER for a new line, and then want to write another definition on that ...
7
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3answers
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amsthm environment and colorbox

I'd like to customize the amsthm command a little bit but I cannot find the relevant lines in the (undocumented?) .sty. How can I put a colorbox on the name of the environment \newtheoremstyle{...
7
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4answers
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Custom list of hypotheses in table of contents format

The Context: I am writing a multi-chapter scientific report with many numbered hypotheses. I have created a custom hypothesis environment in the preamble: \newtheorem{hypothesis}{Hypothesis}[chapter] ...
7
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2answers
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How to remove the word “Proof:” from the environment proof?

I am writing a paper and I will prove a theorem in an appendix because the proof is lengthy. When I use the following code, \documentclass[journal]{IEEEtran} \usepackage{amssymb, amsmath, amsthm, ...
7
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3answers
554 views

Numbering Theorems/Definitions together, by section and without section symbol

I am fairly new to LaTeX and I am looking for a particular style: I want to number my theorems/propositions/corollaries/definitions together and by section. For example, Definition 1.1, Theorem 1.2, ...
7
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2answers
780 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 ...
7
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1answer
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Typeset Theorems in Upright Fonts for Beamer

I want to typeset my theorems within my presentation in upright fonts. The only way I know is by doing this: \begin{theorem} \textup{Upright Theorem} \end{theorem} When I use article document class, ...
7
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2answers
681 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? ...
7
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1answer
16k views

Theorem (definition) numbering

I have two definitions defined as follows: \newtheorem{definition_1}{Definition 1}[chapter] \begin{definition_1} \label{def:def_1} Definition 1 text here. \end{definition_1} \newtheorem{...
7
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4answers
306 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} \begin{...
7
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1answer
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Incorrect hypothesis counter

The hypotheses counter seems to work incorrectly. All hypotheses are numbered with a 1. What exactly am I doing wrong? I have the following code: \documentclass[12pt]{article} \usepackage{amsthm} ...
7
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2answers
136 views

Setting an “attribute” for Theorem to be accessed later

I am writing a math paper with a large number of theorems. I'm looking to have a table summarizing my results, and I'd love it if the table could be generated automatically from my paper. I' looking ...
7
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1answer
628 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 ...
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2answers
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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 ...
7
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2answers
879 views

Wrong vertical space in theorem environment closed by an equation

It happens that LaTeX, to fill a page vertically, adds extra spaces around equation environments (and other vertical spaces). Now suppose I have a theorem environment (using amsthm) which ends with an ...
7
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1answer
3k views

redefine theorem environment with beamer

beamer seems to define theorem-environments such as definition, but i want to be able to define them myself. In particular I want to use thmtools. \documentclass{beamer} \usetheme{Singapore} \...
7
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2answers
1k views

Beamer newenvironment for theorems

I'm trying to define a new environment for theorems and I'm using this code: % Theorem box \pgfdeclarelayer{background} \pgfsetlayers{background,main} \tikzstyle{thmbox} = [inner sep=1em] \tikzstyle{...
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1answer
4k views

Vertical space around theorems

I'm working in a document that has double-spacing (yuck!), and I want to establish some standards in order to make the thing look "presentable". Currently, the only environment that has an automatic ...
7
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3answers
246 views

When a theorem is the first thing in a list, prevent extra space

I have an "indented" environment in my documents, which I create like this \def\changemargin#1#2{ \list{}{\rightmargin#2\leftmargin#1} \item[] } \let\endchangemargin=\endlist Then if the first ...
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1answer
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\textbf inside a lemma

I have defined lemma and use it as follows: \newtheorem{theorem}{Theorem}[section] \newtheorem{lemma}[theorem]{Lemma} ... \begin{lemma} abc_\textbf{indice} \end{lemma} It turns out that the indice ...
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2answers
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Writing “Proof of . . .” cleanly in svjour3

Perhaps I am spoiled by amsthm, but I rather like being able to freely rename the proof environment, especially when there are intervening statements. For example: Example 1: nice behavior \...
7
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1answer
287 views

Problem regarding Errors after Theoremdefinition using thmtools

I am currently hunting for errors in my template and these two I cannot solve after reading the log and researching: First: ! Argument of \strip@prefix has an extra }. <inserted text> ...
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1answer
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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] ...
7
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2answers
775 views

Own command to create new environment

The following code isn't very minimal but I hope you will be able to understand the code. \setcounter{errorcontextlines}{999} \documentclass{scrartcl} \usepackage{lipsum,ntheorem} \usepackage[...
7
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1answer
235 views

How to place the theorem title in square brackets (instead of paranthesis)

The following MWE returns: Theorem 1 (title). theorem's body \documentclass{article} \usepackage{amsthm} \newtheorem{thm}{Theorem} \begin{document} \begin{thm}[title] theorem's body \end{thm}...
7
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1answer
585 views

Erratic position of QED symbol at the end of proof environment using SIAM template

I already had issues (described here: amsmath package error using SIAM LaTeX template files) with the newest version of SIAM LaTeX template from http://www.siam.org/journals/auth-info.php For now, I ...
7
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1answer
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Define proof environment in thmtools

I'm using thmtools for fancy-looking math environments. But I don't know how to redefine proof environment. I cannot find such topics in its documentation. This is my LaTeX code snippet. \...
7
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1answer
856 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 ...
7
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1answer
717 views

Multiple lists of theorems with different titles (any TeX, in my case XeLaTeX)

I've found out how to use the thmtools package to make lists of theorems. My questions on this are: How do I change the title, given that \renewcommand{\listoftheoremname}{...} gives a LaTeX error: ...
7
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3answers
3k views

AMS theorems in table of contents

I am using the amsthm package. I defined some enviroments like \theoremstyle{plain} \newtheorem{theo}[subsection]{Theorem} \newtheorem{satz}[subsection]{Satz} the numbering works as expected, ...
7
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1answer
2k views

How can I eliminate the vertical extra space before and after the proof-environment?

consider the following code: \documentclass{scrartcl} \usepackage[ngerman]{babel} \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage{graphicx} \usepackage{amsmath} \usepackage{amsthm} \...
7
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1answer
194 views

Change from “Theorem 10.1” to “10.1 Theorem” [duplicate]

Possible Duplicate: Numbering theorem-like environments How can I change the order in which theorems are displayed? I want 10.1 Theorem and not Theorem 10.1 Thanks.
7
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2answers
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Indent Theorem like \hangindent, but for multiple paragraphs

I would like to create a theorem style which indents the theorem exactly like a \hangindent would do, expect that the indention should continue for all paragraphs of the theorem. For example: ...
7
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1answer
5k views

Numbering assumptions in amsthm by hand and referencing them

I have a situation where there are two alternative assumptions that can hold in order for some estimate to be correct. I would like to number them 2.a and 2.b and refer to them in the text (an ...
7
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1answer
1k 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). ...
7
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2answers
2k views

Footnote marker placement in heading of theorem/definition/etc.

I have a definition, and a footnote which refers to the whole definition.  So I’d ideally like an output looking something like: Definition 1.53.   A footnote is a small aside, usually ...
6
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5answers
2k views

Marking the end of a definition

I'm using the amsthm package to define a definition environment as follows: \theoremstyle{definition} \newtheorem{definition}{Definition} To my surprise, this provides barely any typographic ...
6
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2answers
866 views

Hide content to show later

My question appeared about this egreg's answer. I have a list of exercise-answers but I don't want to show the answers immediately but after till I'll pull with a command and fetch all the answers ...
6
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2answers
627 views

Theorem without counter (any TeX)

I often use theorems on LaTeX and have defined various kinds of them. At times, however, it is best not to define a specific theorem which would otherwise be a once-in-a-long-time usage, as for ...
6
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2answers
13k views

\begin{problem} analogue to \begin{proof}

I recently learned about \begin{proof} ... \end{proof}, which is a good environment to work in. My question is whether there exists a similar environment to state a problem, or whether I can write ...
6
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3answers
403 views

Overruns in newtheorem in latex

I'm defining a newtheorem as follows: \newtheorem{definition}{Definition} the problem is when the definition name is long, it results in overruns. I've tried \\ to split the name in two lines, ...
6
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2answers
583 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 ...
6
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2answers
611 views

How to change margins in enunciation (theorem-like environment)?

I'd like the margins in the example environment in the code below to be slightly indented. What is the easiest way of achieving this? It's supposed to apply to all example environments. In the ...
6
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2answers
2k views

Numbering theorems in a chapter with no sections

Say I have an index such as: 1. Chapter 1.1 Section 1.2 Section 2. Chapter 3. Chapter and I number my theorems as \newtheorem{theorem}{Theorem}[section] with the last theorem in 1.2 being ...
6
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1answer
2k views

Changing `proof` endmark when using `ntheorem` with `thmmarks` and `amsthm` options

Q: Is there an easy way to change the default proof environment endmark (it's normally a funny open square and I'd like to change it to \blacksquare) when using the ntheorem package with the amsthm ...