Replace \mathrm by \text

content/maths.tex

@@ -78,6 +78,6 @@ Line breaks are denoted by two backslashes.
 
 Sometimes sets have to be defined in terms of textual descriptions or longer function names.
 The \LaTeX{} math mode assumes that letters are variables rather than text, which creates problems when they are indeed supposed to be entire words.
-For this case, there is the \code{latex}{\textbackslash mathrm\{\}} command (\enquote{math roman}, c.\,f. \cref{lst:set-builder-notation}).
+For this case, there is the \code{latex}{\textbackslash text\{\}} command (c.\,f. \cref{lst:set-builder-notation}).
 
 \example{lst:set-builder-notation}{maths/set-builder-notation}{Problems arising from intensional set notation and their solution}

exercises/maths/math-formulas.code.done.tex

@@ -16,7 +16,7 @@ $$x_{1,2} = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$$
 $$n! = \prod_{i=1}^{n} i$$
 
 % Set of all odd natural numbers
-$$\{ x \mid x \in \mathds{N}, \mathrm{odd}(x) \}$$
+$$\{ x \mid x \in \mathds{N}, \text{odd}(x) \}$$
 
 % Elimination $\neg\exists x$
 $$\neg\exists x . p(x) \Leftrightarrow \forall x . \neg p(x)$$

exercises/maths/math-formulas.rend.tex

@@ -36,7 +36,7 @@ $$n! = \prod_{i=1}^{n} i$$ \\
 ~ \\
 
 \textbf{Set of all odd natural numbers}
-$$\{ x \mid x \in \mathds{N}, \mathrm{odd}(x) \}$$
+$$\{ x \mid x \in \mathds{N}, \text{odd}(x) \}$$
 ~ \\
 
 \textbf{Elimination $\neg\exists x$}

listings/maths/set-builder-notation.tex

@@ -1,4 +1,4 @@
 \begin{align*}
   \left\lbrace x \mid tiefe(x) \geq 20 \right\rbrace \\
-  \left\lbrace x \mid \mathrm{tiefe}(x) \geq 20 \right\rbrace
+  \left\lbrace x \mid \text{tiefe}(x) \geq 20 \right\rbrace
 \end{align*}