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How to look up a symbol?
If I write $\mathbb{e}$ nothing gets displayed. However here: http://en.wikipedia.org/wiki/Blackboard_bold it says that blackboard style letter "e" exists in Latex. How can I type it?
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bbm, and then\mathbbm{e}. See the LaTeX Comprehensive Symbol List (Table 213, p 68). – Werner Jan 17 '13 at 04:19