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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 38409 | . 2 ⊢ +∞ = (+∞ei‘0) | |
| 2 | bj-inftyexpidisj 38399 | . 2 ⊢ ¬ (+∞ei‘0) ∈ ℂ | |
| 3 | 1, 2 | eqneltri 2883 | 1 ⊢ ¬ +∞ ∈ ℂ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 ∈ wcel 2147 ‘cfv 6566 ℂcc 11237 0cc0 11239 +∞eicinftyexpi 38395 +∞cpinfty 38408 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pr 5398 ax-un 7783 ax-reg 9623 ax-cnex 11295 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-iota 6520 df-fun 6568 df-fn 6569 df-fv 6574 df-c 11245 df-bj-inftyexpi 38396 df-bj-pinfty 38409 |
| This theorem is used by: (None) |
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