Definition df-e 11816

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 11810	. 2 class e
2		c1 7882	. . 3 class 1
3		ce 11809	. . 3 class exp
4	2, 3	cfv 5259	. 2 class (exp‘1)
5	1, 4	wceq 1364	1 wff e = (exp‘1)

This definition is referenced by:  esum  11829  ere  11837  ege2le3  11838  efzval  11850  reeff1oleme  15018  loge  15113  logdivlti  15127