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Definition df-e 12671
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
StepHypRef Expression
1 ceu 12665 . 2  class  _e
2 c1 8991 . . 3  class  1
3 ce 12664 . . 3  class  exp
42, 3cfv 5454 . 2  class  ( exp `  1 )
51, 4wceq 1652 1  wff  _e  =  ( exp `  1 )
Colors of variables: wff set class
This definition is referenced by:  esum  12683  ere  12691  ege2le3  12692  efzval  12703  loge  20481  logdivlti  20515  emgt0  20845  pntpbnd1a  21279  ex-co  21746  subfaclim  24874
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