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Definition df-e 12345
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 12339 . 2  class  _e
2 c1 8734 . . 3  class  1
3 ce 12338 . . 3  class  exp
42, 3cfv 5222 . 2  class  ( exp `  1 )
51, 4wceq 1624 1  wff  _e  =  ( exp `  1 )
Colors of variables: wff set class
This definition is referenced by:  esum  12357  ere  12365  ege2le3  12366  efzval  12377  loge  19935  logdivlti  19966  emgt0  20295  pntpbnd1a  20729  ex-co  20801  subfaclim  23124
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