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mathematics - Why is the Digamma function always denoted with the letter "psi"? - History of Science and Mathematics Stack Exchange
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Using the Greek letters koppa, stigma, sampi, digamma, heta, san in CM font - TeX - LaTeX Stack Exchange
![Using the Greek letters koppa, stigma, sampi, digamma, heta, san in CM font - TeX - LaTeX Stack Exchange Using the Greek letters koppa, stigma, sampi, digamma, heta, san in CM font - TeX - LaTeX Stack Exchange](https://i.stack.imgur.com/avQJr.png)
Using the Greek letters koppa, stigma, sampi, digamma, heta, san in CM font - TeX - LaTeX Stack Exchange
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