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Definition df-e 13662
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 13656 . 2  class  _e
2 c1 9489 . . 3  class  1
3 ce 13655 . . 3  class  exp
42, 3cfv 5586 . 2  class  ( exp `  1 )
51, 4wceq 1379 1  wff  _e  =  ( exp `  1 )
Colors of variables: wff setvar class
This definition is referenced by:  esum  13674  ere  13682  ege2le3  13683  efzval  13694  loge  22699  logdivlti  22733  emgt0  23064  pntpbnd1a  23498  ex-co  24836  subfaclim  28272
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