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Definition df-e 11656
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
StepHypRef Expression
1 ceu 11650 . 2  class  _e
2 c1 7811 . . 3  class  1
3 ce 11649 . . 3  class  exp
42, 3cfv 5216 . 2  class  ( exp `  1 )
51, 4wceq 1353 1  wff  _e  =  ( exp `  1 )
Colors of variables: wff set class
This definition is referenced by:  esum  11669  ere  11677  ege2le3  11678  efzval  11690  reeff1oleme  14163  loge  14258  logdivlti  14272
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