How to type this two letters in latex

Asked Nov 29 '15 at 11:38

Active Nov 29 '15 at 11:38

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and

The first one look like $\xi$ but not completely the same.

asked Nov 29 '15 at 11:38

Ka Wa Yip

\xi? It rather looks like \mathcal{E} (and the other one \mathcal{F} etc. – Nov 29 '15 at 11:40
The site Detexify can help you find the correct symbols. – hbaderts Nov 29 '15 at 11:41
Detexify does suggest \xi – Ka Wa Yip Nov 29 '15 at 12:01

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