Definition df-e 15985

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 15979	. 2 class e
2		c1 11017	. . 3 class 1
3		ce 15978	. . 3 class exp
4	2, 3	cfv 6489	. 2 class (exp‘1)
5	1, 4	wceq 1541	1 wff e = (exp‘1)

This definition is referenced by:  esum  15997  ere  16006  ege2le3  16007  efzval  16021  loge  26532  logdivlti  26566  pntpbnd1a  27533  ex-co  30429  subfaclim  35243  lamberte  47002