Definition df-e 16154

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 16148	. 2 class e
2		c1 11125	. . 3 class 1
3		ce 16147	. . 3 class exp
4	2, 3	cfv 6533	. 2 class (exp‘1)
5	1, 4	wceq 1570	1 wff e = (exp‘1)

This definition is used by:  esum  16166  ere  16175  ege2le3  16176  efzval  16190  loge  26823  logdivlti  26857  pntpbnd1a  27821  ex-co  30918  subfaclim  35767  lamberte  47756