[Tex/LaTex] How to print sigma symbol

symbols

Picture:

enter image description here

Question is by far simple, how do I print the sigma greek letter?. Situation is that I want to print it as my teacher write it. As shown in the picture. I already tried Detexify with no success by the way.

Best Answer

I don't recognise the image as a sigma. Unicode has three variant lowercase sigmas

U+03c2 GREEK SMALL LETTER FINAL SIGMA
U+03c3 GREEK SMALL LETTER SIGMA
U+03f2 GREEK LUNATE SIGMA SYMBOL

which look like

ςσϲ

or as an image

enter image description here

If you are convinced you want the letter shape you drew just save it as a png or (better if you can) a scalable format such as pdf, then you can do

enter image description here

\documentclass{article}

\usepackage{graphicx,amsmath}

\newcommand\bentpaperclip{\includegraphics[height=1ex]{bentpaperclip.png}}

\begin{document}

\[\sigma \neq \varsigma \neq \bentpaperclip\]

\end{document}
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