Definition df-e 16139

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 16133	. 2 class e
2		c1 11112	. . 3 class 1
3		ce 16132	. . 3 class exp
4	2, 3	cfv 6540	. 2 class (exp‘1)
5	1, 4	wceq 1570	1 wff e = (exp‘1)

This definition is used by:  esum  16151  ere  16160  ege2le3  16161  efzval  16175  loge  26780  logdivlti  26814  pntpbnd1a  27778  ex-co  30818  subfaclim  35693  lamberte  47658