Definition df-e 16033

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 16027	. 2 class e
2		c1 11039	. . 3 class 1
3		ce 16026	. . 3 class exp
4	2, 3	cfv 6498	. 2 class (exp‘1)
5	1, 4	wceq 1542	1 wff e = (exp‘1)

This definition is referenced by:  esum  16045  ere  16054  ege2le3  16055  efzval  16069  loge  26550  logdivlti  26584  pntpbnd1a  27548  ex-co  30508  subfaclim  35370  lamberte  47336