Definition df-e 16088

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 16082	. 2 class e
2		c1 11067	. . 3 class 1
3		ce 16081	. . 3 class exp
4	2, 3	cfv 6515	. 2 class (exp‘1)
5	1, 4	wceq 1559	1 wff e = (exp‘1)

This definition is referenced by:  esum  16100  ere  16109  ege2le3  16110  efzval  16124  loge  26638  logdivlti  26672  pntpbnd1a  27636  ex-co  30596  subfaclim  35498  lamberte  47442