Definition df-e 16031

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 16025	. 2 class e
2		c1 11037	. . 3 class 1
3		ce 16024	. . 3 class exp
4	2, 3	cfv 6492	. 2 class (exp‘1)
5	1, 4	wceq 1547	1 wff e = (exp‘1)

This definition is referenced by:  esum  16043  ere  16052  ege2le3  16053  efzval  16067  loge  26575  logdivlti  26609  pntpbnd1a  27573  ex-co  30533  subfaclim  35423  lamberte  47358