symbols - How to type special/accented letters in LaTeX? - TeX - LaTeX Stack Exchange
List of Greek letters and math symbols - Overleaf, Online LaTeX Editor
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Accents used in Text
fontsize - \mathcal(O) and font size - TeX - LaTeX Stack Exchange
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symbols - How to get a small letter version of \mathcal{O} - TeX - LaTeX Stack Exchange
TeX and Typography on X: "To write Erdős in LaTeX, use Erd\H{o}s. The mark over the o is not an umlaut but a double acute accent, a Hungarian variation on the umlaut.
A April O'neil in latex orange jumpsuit dark ally ra... | OpenArt
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BibTeX Special Symbols
Circle symbols[○,○,◍,◗,◔,◙,⦿] in LaTeX - A platform for wireless