{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.

learn more… | top users | synonyms

7
votes
2answers
93 views

Reference-able custom section numbering

I am writing some lecture notes from a class that I have on Monday, Wednesday, and Friday. What I would like to do is organize them by sections defined by the week and the day, e.g. 1M, 1W, 1F, 2M, ...
7
votes
1answer
864 views

Custom proof environment

How to define another proof environment, say, for the "Proof of lemma"? Also, how to make it without the qed box? (I need one with qed box, and another one without qed box.) I'm using amsbook ...
7
votes
1answer
1k views

\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 ...
7
votes
1answer
475 views

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
votes
1answer
985 views

Fancy box around equation

I am trying to get my equations to show up like: This is my attempt thus far: \documentclass[11pt,fleqn]{book} \usepackage[top=3cm,bottom=3cm,left=3.2cm,right=3.2cm,headsep=10pt,a4paper]{geometry} ...
7
votes
1answer
219 views

How to remove space surrounding a colored theorem box?

This is a follow-up question of Combining spacebelow with shaded parameter in thmtools package. Bug?. How can I get rid of the space above the theorem box? If I comment out the mdframed=... line it ...
7
votes
2answers
622 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} ...
7
votes
1answer
331 views

How do I remove parentheses from theorem optional argument?

This is a MWE: \documentclass[12pt]{article} \usepackage{amsfonts, amsthm, amsmath, amssymb} \theoremstyle{definition} \newtheorem{Theorem}{Theorem}[section] \newtheorem*{Pythagorean ...
7
votes
1answer
700 views

\newmdtheoremenv-environment unnumbered

I would like to have a \newmdtheoremenv environment without any number, like I get it from \newtheorem*. How can I do this? This is my \newmdtheoremenv environment at the moment. ...
7
votes
1answer
119 views

End mark for unnumbered and continued examples

Consider the following MWE \documentclass{article} \usepackage{amsthm} \usepackage{hyperref} \theoremstyle{plain} \newtheorem{theorem}{Theorem}[section] \theoremstyle{definition} ...
7
votes
1answer
140 views

How to change QED sign for theorem classes

I'm writing an article which contains some quite long proofs, some of which include claims with proofs of their own. I dealt with that by adding a claim environment using \newtheorem, but there's a ...
7
votes
1answer
210 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 ...
7
votes
2answers
99 views

Adding text to a different part of the document

I'm writing a LaTeX document at the moment which has problems (which are created in a {theorem} environment) for the reader in it. I'd like to put solutions to those problems in the end of the ...
7
votes
1answer
99 views

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

Possible Duplicate: Numbering theorem-like environments">Numbering theorem-like environments How can I change the order in which theorems are displayed? I want 10.1 Theorem and not Theorem ...
7
votes
1answer
902 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
votes
1answer
560 views

Align the names in \listtheorems (ntheorem)

Question: How do I align the names of theorems in ntheorem list of theorems? Screenshot: Screenshot: (photoshopped) Context: I am using the ntheorem package to typeset a list of theorems and ...
7
votes
0answers
454 views

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 ...
6
votes
3answers
362 views

How to make the asterisk a part of a counter?

I am writing a usual article in amsart style using amsthm package to number the theorems. I need to enumerate certain conditions, while two of them have to bear the same number differing only with an ...
6
votes
2answers
5k 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 ...
6
votes
2answers
158 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
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
3answers
470 views

Multiple tikz path fading in multiple directions

I'd like to create a theorem decoration. Here's a quick take on one: \documentclass{article} \usepackage{tikz} \newcommand{\theoremname}{Theorem} \newcounter{theorem} ...
6
votes
2answers
397 views

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 ...
6
votes
1answer
748 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 ...
6
votes
4answers
4k views

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] ...
6
votes
2answers
249 views

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} ...
6
votes
2answers
234 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
votes
1answer
187 views

Theorem-like definition, without using upshape each time

How can I have theorems and lemmas stated in the default italic font, but definitions and examples in upright font, without having to type the \upshape command within each definition and example? I ...
6
votes
2answers
383 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
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, ...
6
votes
2answers
261 views

\newtheorem other language

I've worked in my article with the next code in my preambule: \usepackage[dutch]{babel} \usepackage[amsthm,thmmarks]{ntheorem} \newtheorem{diver}{Theorem} \newtheorem{ex}{Example} ...
6
votes
1answer
1k views

Shaded theorems (thmtools) spanning pages

When the thmtools package is used to create theorem environments with a shaded background, it does not allow separate theorems to span more than one page. This is a rather severe problem if the ...
6
votes
2answers
127 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
3answers
202 views

Lemmas and sub sections

I want to write a LaTeX code to show, Lemma 1 : x+y=z Lemma 1.1: z-r+t=3 Lemma 1.2: q=r How do I do that?
6
votes
1answer
10k views

Using \newtheorem

Edited to include complete code, as suggested: Here is what the preamble of my main file looks like: \documentclass[12pt]{report} \usepackage{epsfig} \usepackage{upmathgrad2} ...
6
votes
2answers
1k views

Creating list of for \newtheoremstyle

I want to create an list of theorems much like the list of figures, but couldn't find a packacke or tutorial to solve my problem. I tried this http://texblog.org/2008/07/13/define-your-own-list-of/ ...
6
votes
1answer
2k views

How can I change the spacing before theorems with amsthm?

I have a spacing problem. Whenever I include a theorem environment, \begin{theorem}\end{theorem}, the theorem appears very close to the previous line. The spacing is much less than the normal spacing ...
6
votes
3answers
137 views

How can I number theorems in introduction without section counter and later with it?

I would like to have my theorems numbered in the following way. Theorem 1. Blah-blah Theorem 2. More blah-blah Section 1. Theorem 1.1. Special blah Theorem 1.2. More special ...
6
votes
1answer
633 views

Parts numbering in Proofs

I am using proof environment from amsthm to type proofs. Some proofs are long, so it would be nice to split them into numbered parts. I have defined new theorem environment called proofpart for that ...
6
votes
1answer
193 views

Theorem environment numbered according to subsection

I was wondering if there was a way to modify the theorem environment so that it interacted with sections/subsections as follows: \section{} \subsection{} \begin{ex} Whatever \end{ex} ...
6
votes
1answer
4k views

No Counter Theorem1 is defined

I got an exception in the following latex code: "No Counter Theorem1 is defined", what is the problem? \documentclass[conference]{IEEEtran} \newtheorem{definition}[theorem1]{Definition} ...
6
votes
1answer
818 views

Equation numbering restart for every theorem

How to make the equation numbering restart after every proof? One alternative is to use \numberwithin{equation}{theorem} but it shows the chapter and theorem number, like (5.5.1). I want the ...
6
votes
1answer
3k 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 ...
6
votes
1answer
131 views

How to put Theorem Numbers in Boxes?

I'm using amsthm and amsbook. I was wondering how to put theorem numbers in rectangular boxes, both when they first appear as well as when citing them. Here is a picture of what it looks like now: ...
6
votes
2answers
764 views

Beamer newtheorem translation

Consider the following MWE: \documentclass{beamer} \usepackage{lmodern} \usepackage[T1]{fontenc} \usepackage[utf8]{inputenc} \usepackage[spanish]{babel} \uselanguage{Spanish} \languagepath{Spanish} ...
6
votes
2answers
224 views

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 ...
6
votes
1answer
57 views

Spacing issue in new environment from a theorem

I'm trying to create a theorem environment that I can use to repeat a theorem that has been previously stated in a book but number it the same as the 1st instance. I found some sort of solution: ...
6
votes
1answer
87 views

Want theorem and equation numbering linked under section

Similar questions have been answered but the solutions didn't seem to give what I need. I would like theorems and equations both to proceed as follows within each section. Say we've begun Section ...
6
votes
2answers
246 views

subsection vs Theorem

This a typographical/style question. Inside a subsection (after just one paragraph) I have some theorems (amsmath environment). The word Theorem looks stronger (bold, starting with a capital letter) ...
6
votes
1answer
153 views

formulas in bold theorem titles in ntheorem package

I'm not quite sure if this counts as a bug or a feature but I have the following problem with the ntheorem package. The theorem title is bold face, which I like, but in math formulas setting some (or ...