Math & Science ⇒ Alternate bold "a"

[Cham]

By the way, there is a simpler method to change the depiction of vectorial quantities. If, like in your case, it' about having vectors depicted as upright boldfaced letter instead of italicized letter with an arrow above, a single line in the preamble will do.

Code: Select all

\let\vec\mathbf

Ok, thanks for that one !