Users' Mathboxes Mathbox for BJ < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >   Mathboxes  >  bj-minftynrr Structured version   Visualization version   GIF version

Theorem bj-minftynrr 35909
Description: The extended complex number -∞ is not a complex number. (Contributed by BJ, 27-Jun-2019.)
Assertion
Ref Expression
bj-minftynrr ¬ -∞ ∈ ℂ

Proof of Theorem bj-minftynrr
StepHypRef Expression
1 df-bj-minfty 35907 . 2 -∞ = (+∞ei‘π)
2 bj-inftyexpidisj 35893 . 2 ¬ (+∞ei‘π) ∈ ℂ
31, 2eqneltri 2851 1 ¬ -∞ ∈ ℂ
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wcel 2106  cfv 6532  cc 11090  πcpi 15992  +∞eicinftyexpi 35889  -∞cminfty 35906
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2702  ax-sep 5292  ax-nul 5299  ax-pr 5420  ax-un 7708  ax-reg 9569  ax-cnex 11148
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3or 1088  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2533  df-eu 2562  df-clab 2709  df-cleq 2723  df-clel 2809  df-nfc 2884  df-ne 2940  df-ral 3061  df-rex 3070  df-rab 3432  df-v 3475  df-dif 3947  df-un 3949  df-in 3951  df-ss 3961  df-nul 4319  df-if 4523  df-sn 4623  df-pr 4625  df-tp 4627  df-op 4629  df-uni 4902  df-br 5142  df-opab 5204  df-mpt 5225  df-id 5567  df-xp 5675  df-rel 5676  df-cnv 5677  df-co 5678  df-dm 5679  df-iota 6484  df-fun 6534  df-fn 6535  df-fv 6540  df-c 11098  df-bj-inftyexpi 35890  df-bj-minfty 35907
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator