Definition df-e 16227

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 16221	. 2 class e
2		c1 11194	. . 3 class 1
3		ce 16220	. . 3 class exp
4	2, 3	cfv 6537	. 2 class (exp‘1)
5	1, 4	wceq 1570	1 wff e = (exp‘1)

This definition is used by:  esum  16239  ere  16248  ege2le3  16249  efzval  16263  loge  26907  logdivlti  26941  pntpbnd1a  27905  ex-co  31032  subfaclim  35932  lamberte  47907