Definition df-e 16010

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 16004	. 2 class e
2		c1 11045	. . 3 class 1
3		ce 16003	. . 3 class exp
4	2, 3	cfv 6499	. 2 class (exp‘1)
5	1, 4	wceq 1540	1 wff e = (exp‘1)

This definition is referenced by:  esum  16022  ere  16031  ege2le3  16032  efzval  16046  loge  26471  logdivlti  26505  pntpbnd1a  27472  ex-co  30340  subfaclim  35148  lamberte  46862