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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Is there an equivalent to the cases environment for proofs?

The cases environment is nice for displaying equations with multiple cases and short descriptions, but it is awkward for displaying proofs with multi-paragraph cases. Is there an equivalent set of ...
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Text in equations in the statement of a theorem

I have defined the new command ord by \newcommand{\ord}[2]{\text{ord}_{#1}(#2)} This works well normally, giving me ord_p(a) for \ord{p}{a}, which is what I want. However, when I am in theorem mode, ...
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Plural cref to theorem-like environment, singular cref to enumerate item inside it

I have a theorem-like environment, examples that always will include an enumerate within its body. Using cleveref, how can I refer to the entire environment (i.e., all the enumerated items) with ...
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954 views

Undefined control sequence with ntheorem and shaded theorems

I am working with ntheorem and have the following definition of a shaded theorem: \theoremclass{Theorem} \theoremstyle{break} \shadecolor{red} \def\theoremframecommand{% \psshadowbox[fillstyle=solid,...
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159 views

Custom theorem title style

I have been trying everything to get my theorems to look like this: The best I could do was defining \usepackage{amsthm} \theoremstyle{definition} \newtheorem{hypo}{Hypomnema} in the preamble and ...
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Theorem does not work after MikTeX update; no counter defined [duplicate]

The following stopped working after I updated MikTeX today: \documentclass{article} \usepackage{amsthm} \usepackage{hyperref} \usepackage{cleveref} \newtheorem{definition_}[equation]{...
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212 views

Theorem numbering as subsections and automatic solutions

I have a problem environment where the counter is coupled to the subsection counter. However this doesn't work with automatic solutions. I tried to couple the solutions counter to the subsections as ...
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496 views

Avoiding pagebreak after newline in theorem

This might be of relevance: Theorem environment - line break after label pagebreak and amsmath theorem environment issue Avoid page break in theorem Situation I used the information provided in ...
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127 views

mdframed: bug (with roundcorner) when a style for theorem is used within an environment without topline, rightline, etc

When a style for theorem is used within an environment and that this environment a line but topline=false, rightline=false, etc. then some attributes of the theorem are not used. Here, an MWE for ...
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57 views

Theorem and lemma and proposition numberings with the numbers first [duplicate]

If one considers the following MWE one sees that theorems and lemmas have their number as a suffix: \documentclass[fleqn]{scrartcl} \setkomafont{disposition}{\normalfont\bfseries} \makeatletter\let\...
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Break a large theorem using mdframed on beamer [duplicate]

I am using mdframed to write theorems and I've been dealing with this theorem that is quite long and hao 4 equations in it. I have tried using [allowframebreaks] and using \framebreak in a specific ...
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How does \newtheorem work? [duplicate]

I have a large .cls file I'm working with, so I don't know that I can provide a MSE, but here's my question. In my code I have: \theoremstyle{plain} \newtheorem*{theorem}{Theorem} \newtheorem*{...
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Theorem style and Design [duplicate]

I have seen in a few books a style for theorems of the form So what I want ideally is a the theorem title at the top and then the whole theorem enclosed in a box. The shadow is not needed but would ...
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698 views

Customizing theorem list

I use theorems a lot, and make theorem lists. Here is a minimal theorem example with thmtools: \documentclass[a4paper]{report} \usepackage{amsthm,thmtools,amsmath,amssymb,amsfonts} \newtheorem{teor}{...
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140 views

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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152 views

ntheorem vs. amsthm [duplicate]

As far as i know, these are alternative packages for playing with theorem-like environments. What do you choose and why? What should be the de facto standard? Regarding the same topic, are you able ...
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Theorem numbering error [duplicate]

Possible Duplicate: Resetting theorem counters: \sections and (missing) \subsections I have the following in the preamble: \documentclass{article} \usepackage[T1]{fontenc} \usepackage[latin2]{...
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63 views

Formatting help

I am having a problem with parts being italicized that aren't supposed to be, and am struggling to make the list both line up as in start from the same point on the left. Trying to figure out how to ...
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416 views

How to insert picture here?

I want text to flow picture, as it is in the book: And with advice of @Johannes_B I did it with help of minipage, but It doesn't suit me at all things. See this. First page of my document. Do you ...