df-e - Metamath Proof Explorer

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Definition df-e 14843

Description: Define Euler's constant 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 14837	. 2 class e
2		c1 9975	. . 3 class 1
3		ce 14836	. . 3 class exp
4	2, 3	cfv 5926	. 2 class (exp‘1)
5	1, 4	wceq 1523	1 wff e = (exp‘1)

Colors of variables: wff setvar class

This definition is referenced by: esum 14855 ere 14863 ege2le3 14864 efzval 14876 loge 24378 logdivlti 24411 emgt0 24778 pntpbnd1a 25319 ex-co 27425 subfaclim 31296