0

This "I" symbol used in matroid notation:

enter image description here

1 Answers1

4

For example, it can be generated by \mathcal:

\documentclass{article}
\begin{document}
\[ \mathcal{I} \]
\end{document}

Result

Heiko Oberdiek
  • 271,626
  • You have been very fast. I gave the approval of his first post. I think your question is probably a duplicate of some other question on the site. However, the vote positively like the others of yours. – Sebastiano Mar 30 '18 at 20:37