Definition df-e 11586

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 11580	. 2 class e
2		c1 7750	. . 3 class 1
3		ce 11579	. . 3 class exp
4	2, 3	cfv 5187	. 2 class (exp‘1)
5	1, 4	wceq 1343	1 wff e = (exp‘1)

This definition is referenced by:  esum  11599  ere  11607  ege2le3  11608  efzval  11620  reeff1oleme  13293  loge  13388  logdivlti  13402