Definition df-e 16104

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 16098	. 2 class e
2		c1 11156	. . 3 class 1
3		ce 16097	. . 3 class exp
4	2, 3	cfv 6561	. 2 class (exp‘1)
5	1, 4	wceq 1540	1 wff e = (exp‘1)

This definition is referenced by:  esum  16116  ere  16125  ege2le3  16126  efzval  16138  loge  26628  logdivlti  26662  pntpbnd1a  27629  ex-co  30457  subfaclim  35193