Definition df-e 16041

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 16035	. 2 class e
2		c1 11076	. . 3 class 1
3		ce 16034	. . 3 class exp
4	2, 3	cfv 6514	. 2 class (exp‘1)
5	1, 4	wceq 1540	1 wff e = (exp‘1)

This definition is referenced by:  esum  16053  ere  16062  ege2le3  16063  efzval  16077  loge  26502  logdivlti  26536  pntpbnd1a  27503  ex-co  30374  subfaclim  35182  lamberte  46896