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Definition df-e 12441
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 12435 . 2  class  _e
2 c1 8825 . . 3  class  1
3 ce 12434 . . 3  class  exp
42, 3cfv 5334 . 2  class  ( exp `  1 )
51, 4wceq 1642 1  wff  _e  =  ( exp `  1 )
Colors of variables: wff set class
This definition is referenced by:  esum  12453  ere  12461  ege2le3  12462  efzval  12473  loge  20042  logdivlti  20076  emgt0  20406  pntpbnd1a  20840  ex-co  20931  subfaclim  24123
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