Definition df-e 16034

Description: Define Euler's constant e = 2.71828.... (Contributed by NM, 14-Mar-2005.)

Assertion

Ref	Expression
df-e	⊢ e = (exp‘1)

Detailed syntax breakdown of Definition df-e

Step	Hyp	Ref	Expression
1		ceu 16028	. 2 class e
2		c1 11069	. . 3 class 1
3		ce 16027	. . 3 class exp
4	2, 3	cfv 6511	. 2 class (exp‘1)
5	1, 4	wceq 1540	1 wff e = (exp‘1)

This definition is referenced by:  esum  16046  ere  16055  ege2le3  16056  efzval  16070  loge  26495  logdivlti  26529  pntpbnd1a  27496  ex-co  30367  subfaclim  35175  lamberte  46889