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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 34394 | . 2 ⊢ +∞ = (+∞ei‘0) | |
2 | bj-inftyexpidisj 34384 | . 2 ⊢ ¬ (+∞ei‘0) ∈ ℂ | |
3 | 1, 2 | eqneltri 2903 | 1 ⊢ ¬ +∞ ∈ ℂ |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ∈ wcel 2105 ‘cfv 6348 ℂcc 10523 0cc0 10525 +∞eicinftyexpi 34380 +∞cpinfty 34393 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7450 ax-reg 9044 ax-cnex 10581 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-ral 3140 df-rex 3141 df-rab 3144 df-v 3494 df-sbc 3770 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-nul 4289 df-if 4464 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4831 df-br 5058 df-opab 5120 df-mpt 5138 df-id 5453 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-iota 6307 df-fun 6350 df-fn 6351 df-fv 6356 df-c 10531 df-bj-inftyexpi 34381 df-bj-pinfty 34394 |
This theorem is referenced by: (None) |
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