Definition df-e 16240

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 16234	. 2 class e
2		c1 11205	. . 3 class 1
3		ce 16233	. . 3 class exp
4	2, 3	cfv 6539	. 2 class (exp‘1)
5	1, 4	wceq 1569	1 wff e = (exp‘1)

This definition is used by:  esum  16252  ere  16261  ege2le3  16262  efzval  16276  loge  26920  logdivlti  26954  pntpbnd1a  27918  ex-co  31045  subfaclim  36040  lamberte  48032