Consider the following MWE:
\documentclass{amsart}
\begin{document}
Let $(M,d)$ be a metric space. For any $x \in M$ and $r > 0$, the \textbf{open ball of radius $r$ around $x$} is the set
\begin{equation}
B_r(x) := \{y \in M : d(y,x) < r\}.
\end{equation}
\end{document}
Is there any possibility that the math symbols are also bold by default, i.e. without writing explicitly something like \mathbf{a + b}
?
Best Answer
You might update the definition of
\bfseries
to also issue\boldmath
. However I recommend using\emph
for emphasis.Never leave a blank line before an
equation
or other math display environment. Use ties, as I show in the second example.Why is it bad using boldface type? Because it's too heavy. Why is it worse to embolden math? Because math symbols have a meaning that also depends on their typographic nature: to a mathematician, a boldface italic ‘r’ is not the same as a medium italic ‘r’.