Gro-Tsen on X: "Classic LaTeX: the answer to a question which aught to be trivial (getting bold math!) reveals (https://t.co/1ZLpXve2VU) the existence of about 42 packages to do it, with obscure interactions
File:LaTeX example dcolumn bold.png - Wikimedia Commons
Math font attributes
latex - Bold horizontal and vertical lines in Longtable - Stack Overflow
Learn how to bold math symbols: Easy steps - LaTeX-Tutorial.com