How to write this formula:

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How can I read symbol e?

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    Welcome to TeX.SX! You can have a look at our starter guide to familiarize yourself further with our format. I think you need \hat{e} but you chose the worst title possible. – CarLaTeX Jul 7 '18 at 7:20
  • Please clarify what you mean by "read symbol e"? Are you asking how to place a "hat" symbol above a lowercase letter "e"? – Mico Jul 7 '18 at 7:25
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    Did you see the posting Trying to use “\~” to generate tilde symbol in math mode? This answer addresses not only to tilde symbols, but "hat", "dot", "double-dot" and other symbols as well. – Mico Jul 7 '18 at 7:33


$\hat{e}(aP,bP)= \hat{e}(P,bP)^a$
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    Did you mean to write bP instead of p? – Mico Jul 7 '18 at 8:05
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    Please use proper code markup. – Johannes_B Jul 7 '18 at 8:08
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    -1: Answers should be self-contained, i.e. one can copy, paste and typeset them without having to write boilerplate. Please make your answer into a minimal working example (MWE). – Henri Menke Jul 7 '18 at 9:57
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    +1 The question itself is lacking a MWE, so it would be unfair to expect a MWE in an answer – user36296 Jul 7 '18 at 19:29

I would recommend to use \left and \right as well

\hat{e}\left(aP,bP\right) = \hat{e}\left(P,bP\right)^a

  • For such simple expression, I would not recommend. Maybe \bigl( \bigr). But this is just opinion. – Sigur Jul 7 '18 at 13:53
  • @Sigur Actually, according to this question, this answer and this answer, \left and \right should be used sparsely. – Ruixi Zhang Jul 7 '18 at 15:46
  • Useful insights about the \left and \right commands. Thank you. – Jeffrey J Weimer Jul 8 '18 at 14:06

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