Definition df-e 16278

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 16272	. 2 class e
2		c1 11240	. . 3 class 1
3		ce 16271	. . 3 class exp
4	2, 3	cfv 6566	. 2 class (exp‘1)
5	1, 4	wceq 1570	1 wff e = (exp‘1)

This definition is used by:  esum  16290  ere  16299  ege2le3  16300  efzval  16314  loge  26971  logdivlti  27005  pntpbnd1a  27969  ex-co  31096  subfaclim  36161  lamberte  48211