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Definition df-e 12626
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 12620 . 2  class  _e
2 c1 8947 . . 3  class  1
3 ce 12619 . . 3  class  exp
42, 3cfv 5413 . 2  class  ( exp `  1 )
51, 4wceq 1649 1  wff  _e  =  ( exp `  1 )
Colors of variables: wff set class
This definition is referenced by:  esum  12638  ere  12646  ege2le3  12647  efzval  12658  loge  20434  logdivlti  20468  emgt0  20798  pntpbnd1a  21232  ex-co  21699  subfaclim  24827
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