Definition df-e 15422

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 15416	. 2 class e
2		c1 10538	. . 3 class 1
3		ce 15415	. . 3 class exp
4	2, 3	cfv 6355	. 2 class (exp‘1)
5	1, 4	wceq 1537	1 wff e = (exp‘1)

This definition is referenced by:  esum  15434  ere  15442  ege2le3  15443  efzval  15455  loge  25170  logdivlti  25203  pntpbnd1a  26161  ex-co  28217  subfaclim  32435