Definition df-e 16110

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 16104	. 2 class e
2		c1 11089	. . 3 class 1
3		ce 16103	. . 3 class exp
4	2, 3	cfv 6525	. 2 class (exp‘1)
5	1, 4	wceq 1563	1 wff e = (exp‘1)

This definition is referenced by:  esum  16122  ere  16131  ege2le3  16132  efzval  16146  loge  26705  logdivlti  26739  pntpbnd1a  27703  ex-co  30694  subfaclim  35546  lamberte  47481