df-e - Metamath Proof Explorer

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Definition df-e 16014

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 16008	. 2 class e
2		c1 11113	. . 3 class 1
3		ce 16007	. . 3 class exp
4	2, 3	cfv 6543	. 2 class (exp‘1)
5	1, 4	wceq 1541	1 wff e = (exp‘1)

Colors of variables: wff setvar class

This definition is referenced by: esum 16026 ere 16034 ege2le3 16035 efzval 16047 loge 26102 logdivlti 26135 pntpbnd1a 27095 ex-co 29729 subfaclim 34248