# e

From Conservapedia

* e* is a useful mathematical constant which is a transcendental number approximately equal to 2.718281828459045 .

*e*can be used in logarithms as the base, called a natural logarithm.

*e*is named for Swiss mathematician Leonhard Euler, though he did not discover the constant.

It has some remarkable properties. For example:

(i.e. the exponetial function is an eigenfunction of the derivative operator, with eigenvalue 1).

## Formulae for *e*

- With limits -
- With infinite series -