I am using svjour3 template to submit a paper. My problem is LaTeX faces these errors:
Undefined control sequence
\mathbb{} .
Similarly
Undefined control sequence
\mathfrac{} .
[Tex/LaTex] svjour3 undefined control sequence
errorsmath-modesymbols
Related Solutions
Update Jan. 2021: It has come to my attention that starting with the 2020/02/02 version of the LaTex2e format, it is no longer necessary to load the textcomp package in order to use the instruction \textquotesingle. For more information about the changes brought about by the 2020/02/02 version of LaTeX, see https://www.latex-project.org/news/latex2e-news/ltnews31.pdf.
(The answer I posted back in September 2014 follows. I suppose it is now mainly (purely?!) of historical relevance.)
You may have forgotten to load the textcomp package, which defines the macro \textquotesingle. With the package loaded, your code doesn't throw an error.
By the way, the curly braces after each \textquotesingle and around the square brackets aren't needed. I'd omit them, to reduce code clutter.
\documentclass{article}
\usepackage{textcomp}
\begin{document}
\texttt{man1 = Person(\textquotesingle M\textquotesingle, 1, [2, 1])}
\end{document}
The macro \mathclap is defined in package mathtools:
\usepackage{mathtools}
The macro takes an optional argument for the math style and a mandatory argument for the math stuff, which is put in a zero-width box and centered there. Therefore,
\stackrel{\mathclap}{\rightarrow}
does not make sense, since the mandatory argument for \mathclap is missing.
Best Answer
Load the
amssymbpackage for\mathbband\mathfrak(sic!).