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| Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-pinftynrr | Structured version Visualization version GIF version | ||
| Description: The extended complex number +∞ is not a complex number. (Contributed by BJ, 27-Jun-2019.) |
| Ref | Expression |
|---|---|
| bj-pinftynrr | ⊢ ¬ +∞ ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-bj-pinfty 37724 | . 2 ⊢ +∞ = (+∞ei‘0) | |
| 2 | bj-inftyexpidisj 37714 | . 2 ⊢ ¬ (+∞ei‘0) ∈ ℂ | |
| 3 | 1, 2 | eqneltri 2884 | 1 ⊢ ¬ +∞ ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∈ wcel 2145 ‘cfv 6525 ℂcc 11086 0cc0 11088 +∞eicinftyexpi 37710 +∞cpinfty 37723 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-sep 5251 ax-nul 5261 ax-pr 5395 ax-un 7722 ax-reg 9542 ax-cnex 11144 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-tp 4590 df-op 4592 df-uni 4869 df-br 5106 df-opab 5168 df-mpt 5187 df-id 5547 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-iota 6481 df-fun 6527 df-fn 6528 df-fv 6533 df-c 11094 df-bj-inftyexpi 37711 df-bj-pinfty 37724 |
| This theorem is referenced by: (None) |
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