Learn how to bold math symbols: Easy steps - LaTeX-Tutorial.com
fonts - How can I get bold math symbols? - TeX - LaTeX Stack Exchange
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Learn how to bold math symbols: Easy steps - LaTeX-Tutorial.com
Gro-Tsen on Twitter: "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
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fonts - How can I get bold math symbols? - TeX - LaTeX Stack Exchange