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### Deactivating italic text in body of a "definition" environment [duplicate]

I definied a new theorem via \newtheorem{def}{definition} But the text has a italic font and i do not want that. how can i deactivate the italic font?
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### How to make an environment such as "theorem" not have italics [duplicate]

I found this: How to change the font style in theorem environment? as well as this: Italic in theorem environment Neither however seem to make sense to me as I have been using the following: \...
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### In the Definition and Lemma body environment I want non italic content [duplicate]

I am using a book style file and in the preamble I defined some theorem environment. But in the Definition and Lemma part I want nonitalic content. Please suggest. My preamble are \newtheorem{theorem}...
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### How to make examples without italic font? [duplicate]

I'm doing a project and in my LaTeX file the examples are in italic. I want to know if there is something I can do to avoid it and put the examples in normal font. I did put the examples as "...
29k views

### New Theorem Style

I'm pretty new to LaTeX. And I don't really understand the following code, it is merely a pasted template from wikipedia. I'm trying to make a simple theorem style which is identical to the normal ...
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### Italicizing of amsthm package

I'm using the amsthm package, and I noticed that a remark is automatically italicized, while a theorem and a proposition are not. What other keywords have their content automatically italicized by ...
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### How to change the font shape in the body of theorem environments?

\documentclass{article} \usepackage{amsmath,amssymb} \newtheorem{defn}{Definition} \newtheorem{pro}{Problem} \newtheorem{thm}{Theorem} \begin{document} \begin{defn} This is the first definition \end{...
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### Changing theorem/lemma... label to bold italics

For theorems in my contribution I use \theoremstyle{plain}. This style prints theorem label in bold italics, eg. 'Theorem 1.', which is followed by text in italics. How could I set 'Theorem 1.' to ...
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### My "definition" environment is in italic

I obtained a TeX "pre-built" file in order to write for my college, but it so happens that every time I call a definition environment (which is defined in the file), it is always in italic. I am not ...
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### Using/Forcing upright text within theorem environment

I would like to write an equation within a theorem that involves an integrand and the upright symbol $\textrm{d}$ which I have abbreviated in my preamble with \newcommand{\dmath}{\textrm{d}} (and ...
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### What kind of commands produce the "example" and "solution" headings in the picture

I've tried using flushleft with bolds such as \begin{flushleft}{\medium{\textbf{Example 1}}\end{flushleft} but that makes a large space right after. Notice the text is all the way to the left of ...
856 views

### Font style in newtheorem

I have the following MWE \documentclass[12pt, A4paper]{article} \usepackage{amssymb} \usepackage{amsmath} \usepackage{amsthm} \newtheorem*{solution}{Solution} \begin{document} This is a proof: \...
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### Switch body font shape of newtheorem automatically

It is interesting that \emph will switch the shape of font automatically based on the current font is italic or not, e.g., \emph{This is \emph{non-italic} italic}. will produce something like： ...