Symbols:E

Hexadecimal

 * $$\mathrm{E}$$ or $$\mathrm{e}$$

The hexadecimal digit $$14$$.

Its LaTeX code is \mathrm{E} or \mathrm{e}.

Set

 * $$E$$

Used by some authors to denote a general set.

The LaTeX code for $$E$$ is E.

Identity Element

 * $$e$$

Used to indicate the identity element in a general algebraic structure.

If $$e$$ is the identity of the structure $$\left({S, \circ}\right)$$, then a subscript is often used: $$e_S$$.

This is particularly common when more than one structure is under discussion.

The LaTeX code for $$e_S$$ is e_S.

Euler's number

 * $$e$$

Euler's number $$e$$ is the base of the natural logarithm $$\operatorname{ln}$$.

It is defined to be the unique real number such that the value of the exponential function $$e^x$$ has the same value as the slope of the tangent line to the graph of the function.

The LaTeX code for $$e$$ is e.

Experiment

 * $$\mathcal E$$

The LaTeX code for $$\mathcal E$$ is \mathcal E.