Definition df-e 16089

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 16083	. 2 class e
2		c1 11135	. . 3 class 1
3		ce 16082	. . 3 class exp
4	2, 3	cfv 6536	. 2 class (exp‘1)
5	1, 4	wceq 1540	1 wff e = (exp‘1)

This definition is referenced by:  esum  16101  ere  16110  ege2le3  16111  efzval  16125  loge  26552  logdivlti  26586  pntpbnd1a  27553  ex-co  30424  subfaclim  35215  lamberte  46887