User talk:87.128.7.97

identity
Really a nice article.

I would like to suggest an additional part of info: Within the paragraph "beauty" is the following line: "The number e (e = 2.718...), a.k.a. Euler's number, which occurs widely in mathematical analysis."

There is another identity involved since the exponential function e to the power of x (with  x being a real number) is it's own derivative which might also be some kind of identity.

Perhaps it is worth adding?

Regards

R.