Learn how to bold math symbols: Easy steps - LaTeX-Tutorial.com
amsmath - Regular text font boldface subscript in math mode - TeX - LaTeX Stack Exchange
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latex - bold not bold enough in math - TeX - LaTeX Stack Exchange
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
Unable to make math mode bold · Issue #164 · yzhang-gh/vscode-markdown · GitHub
Bold, italics and underlining - Overleaf, Online LaTeX Editor