Definition df-e 15975

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 15969	. 2 class e
2		c1 11007	. . 3 class 1
3		ce 15968	. . 3 class exp
4	2, 3	cfv 6481	. 2 class (exp‘1)
5	1, 4	wceq 1541	1 wff e = (exp‘1)

This definition is referenced by:  esum  15987  ere  15996  ege2le3  15997  efzval  16011  loge  26523  logdivlti  26557  pntpbnd1a  27524  ex-co  30416  subfaclim  35230  lamberte  46925