{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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11
votes
2answers
989 views

How do I get non-italic words in a theorem environment?

I want some words in my theorem environment to not be italic. I know there are simple ways to get the entire theorem in roman, but I'm looking for an italic theorem with specified words in roman. I ...
6
votes
2answers
112 views

Getting the number of a chapter-numbered theorem but without the chapter number

Suppose in Chapter 3 I have Theorem 3.17. I need to get the "17", NOT the "3.17" which would readily be obtained using \label then \ref. How do i do that? Edit: (Probably a more relaxing condition): ...
3
votes
1answer
220 views

How can I number subtheorems hierachically?

I want to create two hierarchy levels of theorems. The goal is to have something like this: Research Question 1: bla bla Research Question 2: bla bla And then in another section of the article, I ...
6
votes
1answer
499 views

controlling theorem numbers using llncs style

Is there a way to control the numbering of different types of theorems, when using the llncs style? With the envcountsame parameter, all theorems/definitions/claims use the same counter and get ...
7
votes
2answers
340 views

Change definition number in beamer

In a beamer presentation, I need to redefine one definition (the definition numbers have to be same). How can I do that? Here is my code. \documentclass{beamer} \setbeamertemplate{theorems}[ams ...
1
vote
2answers
110 views

Making an indented, bold definition/theorem/proof

I would like a result such as this: "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur aliquam tincidunt mi id elementum. Fusce nec mauris sodales, cursus massa id, feugiat mi: (My ...
7
votes
1answer
246 views

How to copy a lemma to appendix without changing its number?

I have a document with a lemma (using amsthm), like so: \begin{lem} \label{mylemma} % ... \end{lem} The proof of this lemma can be found in the appendix (see section \ref{sec:proof_of_mylemma}). ...
3
votes
2answers
52 views

Blocks at the End of a Solution Structure [duplicate]

so a couple of months ago I created my own package. Everything in it works great, and so far it does everything I need it to do, the way I need it to. But I want to change one thing. When I made the ...
1
vote
1answer
103 views

Using parskip with ntheorem in a book

I am writing a mathematical book and would like to use ntheorem for theorems. Also, I would like to use parskip, because I like these styles of paragraphs more. My problem is that as soon as I include ...
3
votes
1answer
148 views

Wrapping image with multiple theorem-like environments and displayed math

I'm struggling to put an image into a page with multiple theorem-like environments, some of which include displayed math, but I can't get the text to wrap correctly around the image and caption: ...
2
votes
0answers
23 views

Error using hyperref, cleveref and \newtheorem: no counter defined [duplicate]

Here's my problem: I'm writing some mathematics lecture notes. I needed some different theorem types, such as propositions, lemmas, plus observations, examples and definitions whose numbering depends ...
2
votes
2answers
234 views

How to Number Theorems within a Chapter? [duplicate]

There are lots of theorems and lemmas in my thesis which are being numbered continuously from start to end. I want the numbering to be like Theorem <>.<>. Same for lemmas and ...
3
votes
1answer
102 views

continuous numbering of theorems for the whole article

In the code \newtheorem{thm}{Theorem}[section] what should stand in place of section to get continuous numbering (simply Theorem 1, Theorem 2, etc.) for the whole text?
7
votes
2answers
96 views

Problems with theoremref

I'm having some problems with the theoremref package. Basically, instead of giving me as output something like "Lemma 1.1.1", where "Lemma" is the name of the theorem, it gives me something like "lem ...
5
votes
1answer
212 views

How to change theorem numbering style in one chapter only?

I want to change numbering theormn and lemma in one chapter in thesis without change other chapters. Namely numbering (theormn and lemma) in one chapter is different from another chapter. How to ...
10
votes
1answer
186 views

Numbering theorems in the left margin

My question is similar to this and this. I would like to have the theorem number in the left margin (0.6em spacing to the main text) and the Name 'Theorem' should be justified to the main text. The ...
6
votes
1answer
274 views

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: ...
3
votes
1answer
686 views

Changing the color of theorem headings

I have a theorem environment, and I would like: The text color of Problems and their contents to be a custom color (defined as `db' below) The text color of Solutions to be a custom color (defined ...
1
vote
0answers
84 views

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 ...
1
vote
0answers
43 views

numbering of theorems in chapters [closed]

I want to write some papers in Math but I have some problems. when I wrote the first chapter it appears Theorem 1, Lemma 1, when I wrote the second chapter it appeared Theorem 3, Lemma 2. How can ...
3
votes
1answer
163 views

Vertical spacing around theorem environment

Consider this answer from karlkoeller: \documentclass[danish]{article} \usepackage{babel} \usepackage{color} \usepackage{amsthm,thmtools} % Colors. \definecolor{section_color}{rgb}{0.35,0.0,0} ...
6
votes
1answer
146 views

Using thmtools: numbering with asterisk

I would like to repeat a theorem number with an added asterisk. That is, the original theorem is: Theorem 1. Lorem ipsum... And I would like the analogue theorem to be: Theorem 1*. Lorem ipsum...
7
votes
1answer
491 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. ...
6
votes
1answer
265 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 ...
9
votes
1answer
177 views

Remove numbering of unreferenced theorems

Can theorems, lemmas, etc., be automatically displayed without numbers if not referenced (like \mathtoolsset{showonlyrefs} for equation tags)?
0
votes
1answer
210 views

Natural deduction like proof

I'm not sure what the right word is for this kind of proof (in the picture): It is some kind of combination of natural deduction and normal math proofs. I'm wondering how I could do this in LaTeX. ...
7
votes
2answers
95 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, ...
4
votes
1answer
294 views

thmbox with normal font and section numbering

How can i use "normal font" for definitions and "italic" for remarks (and similar environments like them) in thmbox environment declaring some commands. Also i need numbering as "section" or ...
4
votes
1answer
331 views

List of theorems with thmtools not working - Missing \endcsname inserted

I am trying to generate a list of all equations in a document. I have searched and it seemed a good solution would be to use the thmtools, which can generate a list of all theorems(if im correct). ...
3
votes
1answer
98 views

Description definitions and ntheorem

I want to have inline listings in description items, so I used this very nice answer. Unfortunately this hackery destroys my theorem environments with error something's wrong--perhaps a missing \item ...
4
votes
1answer
58 views

Strange error related to theorem name (XeTeX)

Trying to have a theorem with [name=Dominio e codominio dell'operatore $D^{\vct{q}}$,label=thm:oss:DomCodomDq] gives the following error: The error is given by the following MWE: ...
2
votes
1answer
131 views

Lists of Theorems (XeLaTeX)

I've found out how to use the thmtools package to make lists of theorems. My questions on this are: Adding [name=xxx,label=thm:...] after \begin{yyy} (xxx is a title for the theorem, ... a label ...
8
votes
1answer
236 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 ...
1
vote
1answer
199 views

How to define a command that could generate similar environments just as \newtheorem does?

It's well known that the LaTeX built-in command \newtheorem could generate a series of the theorem environments that are similar: they share the same theme of layout style but differ in their name and ...
3
votes
1answer
75 views

Bold claim environment through local layout in LyX

I would like to create a new bold "Afirmação" ("Claim" in portuguese) environment through "Local Layout" in LyX (I don't want to create a new layout file). So I went to Document -> Settings -> Local ...
2
votes
1answer
98 views

How can I automatically typeset a list of (theorem-like) definitions?

I've defined two custom types of theorem-like environments: definition and example. I now want to automatically typeset a list of such environments present in my document. The output I'd like to get ...
1
vote
1answer
176 views

How to define numbered theorem, definition at ConTeXt ?(ConTeXt)

I have problem about define numbered like theorem, definition, corrollary etc at ConTeXt ? You can see like this my screenshot and my code (sorry, i copy and paste from other document) : and my ...
6
votes
1answer
5k views

Using amsthm but still getting “Environment theorem undefined”

I'm trying to write up all my university theorems and I cant get the theorem environment to work. Here is a mini example of what I'm trying to do. \documentclass[a4paper,12pt]{article} ...
5
votes
1answer
141 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 ...
3
votes
1answer
63 views

Name referencing for arbitrary text?

In my TeX file I have a something like this: \newcommand{\head}[2]{ \textbf{#1 \imp:} \textit{#2}\\ } \newcommand{\definition}[1]{ \head{Definition}{#1} } \newcommand{\lemma}[1]{ \head{Lemma}{#1} } ...
5
votes
1answer
2k views

Controlling numbering of theorems in Beamer

I have a theorem that is too long for one frame. As \allowframebreaks does not work within the \theorem environment, I am trying to find a workaround. I can simply end the theorem environment on one ...
4
votes
1answer
96 views

Listings environment within another environment

\newtheorem{alg}{Algorithm}[subsection] \begin{alg}\label{alg:1} \begin{lstlisting}[frame = single, breaklines = true, numbers = left] test code \end{lstlisting} \end{alg} How can I prevent the ...
5
votes
0answers
49 views

Repeat a Theorem [duplicate]

For my thesis I have to repeat my theorems, not just the number but the exact wording of the Theorems. I found the question How to repeat the content of a quote (e.g. introduction+conclusion) without ...
3
votes
3answers
208 views

Changing theorem number systems mid document

I have a numbering system setup for most of my document using: \newtheorem{theorem}{Theorem}[section] \newtheorem{lemma}[theorem]{Lemma} \newtheorem{corollary}[theorem]{Corollary} Which produces ...
6
votes
2answers
416 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 ...
2
votes
1answer
74 views

How to combine thmmarks with addtag for \[\]?

I have the problem, that I have quite a few equations in my text. As I am oftenly unsure if I will need them later as a reference, I searched for a way to avoid exchanging \[...\] with and equation ...
4
votes
1answer
122 views

How to create an unnumbered theorem?

I'm looking for a way to create a new theorem without numbering. I found Theorem without numbering and tried the accepted answer, but I get the error "Command * already defined". This is the code I'm ...
4
votes
1answer
247 views

Axiom 1 and 1' in LyX

I'm using LyX with "Theorems (AMS, numbered by type)" and "Theorems (AMS-extended, numbered by type)" modules. I would like to have the following output: Axiom 1. Lorem. Axiom 1'. Ipsum. Is there a ...
4
votes
1answer
78 views

achieve a theorem like construct without newtheorem

I am trying to achieve a theorem like representation in my beamer presentation as shown. Currently I am defining a newtheorem env for each such construct in preamble, and then using that, as: %in ...
2
votes
1answer
141 views

Theoremstyle with line break but non italic text

I use the theorems (from the amsthm-package) to specify definitions, examples and so on.. I want them to do two things: 1) line break after the label 2) non italic text within the theorem! I ...