Definition df-e 16235

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 16229	. 2 class e
2		c1 11202	. . 3 class 1
3		ce 16228	. . 3 class exp
4	2, 3	cfv 6538	. 2 class (exp‘1)
5	1, 4	wceq 1569	1 wff e = (exp‘1)

This definition is used by:  esum  16247  ere  16256  ege2le3  16257  efzval  16271  loge  26915  logdivlti  26949  pntpbnd1a  27913  ex-co  31040  subfaclim  36022  lamberte  48014