bold math

[Jeff Pitblado (StataCorp)]

Playing with bold in math expressions:

Here is the code

\[
M \ne \mathbf{M}
\]

Here is the result
\[
M \ne \mathbf{M}
\]

[Matthew J. Baker]

\[
f(x)
\]

[Suresh Paul]

Just trying ...
\[
y = \alpha + X + \epsilon
\]

[Stefano Grillini]

Just trying...

\[
\frac{2}{3}
\]

\[
M \ne \mathbf{M}
\]

\[
M \ne \mathbf{M}
\]

[eric_a_booth]

\[ \frac{2}{3}+ \mathbf{\pi} \]
\[ M \ne \mathbf{M} \]