Mathematics e 1 equals e itself. In mathematics, the symbol e represents a natural constant, a value similar to π, and they are all irrational numbers.

As a mathematical constant, e is the basis of natural logarithmic function. Sometimes called Euler number, named after the Swiss mathematician Euler; There is also a relatively rare name Napier constant to commemorate the introduction of logarithm by Scottish mathematician John Napier. It is one of the most important constants in mathematics, just like pi and imaginary units I and E.

The special significance of e to natural numbers;

All 2n-type even numbers greater than 2 exist in the * * * yoke odd array centered on E, the sum of each group is 2n, and at least one group is a * * * yoke prime number.

It can be said to be the central axis of prime numbers, but it is only the central axis of odd numbers.

Baidu Encyclopedia-Natural Constant