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Mirrors > Home > MPE Home > Th. List > mulnzcnopr | Structured version Visualization version GIF version |
Description: Multiplication maps nonzero complex numbers to nonzero complex numbers. (Contributed by Steve Rodriguez, 23-Feb-2007.) |
Ref | Expression |
---|---|
mulnzcnopr | ⊢ ( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))):((ℂ ∖ {0}) × (ℂ ∖ {0}))⟶(ℂ ∖ {0}) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-mulf 10668 | . . . . 5 ⊢ · :(ℂ × ℂ)⟶ℂ | |
2 | ffnov 7279 | . . . . 5 ⊢ ( · :(ℂ × ℂ)⟶ℂ ↔ ( · Fn (ℂ × ℂ) ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ ℂ (𝑥 · 𝑦) ∈ ℂ)) | |
3 | 1, 2 | mpbi 233 | . . . 4 ⊢ ( · Fn (ℂ × ℂ) ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ ℂ (𝑥 · 𝑦) ∈ ℂ) |
4 | 3 | simpli 487 | . . 3 ⊢ · Fn (ℂ × ℂ) |
5 | difss 4039 | . . . 4 ⊢ (ℂ ∖ {0}) ⊆ ℂ | |
6 | xpss12 5543 | . . . 4 ⊢ (((ℂ ∖ {0}) ⊆ ℂ ∧ (ℂ ∖ {0}) ⊆ ℂ) → ((ℂ ∖ {0}) × (ℂ ∖ {0})) ⊆ (ℂ × ℂ)) | |
7 | 5, 5, 6 | mp2an 691 | . . 3 ⊢ ((ℂ ∖ {0}) × (ℂ ∖ {0})) ⊆ (ℂ × ℂ) |
8 | fnssres 6458 | . . 3 ⊢ (( · Fn (ℂ × ℂ) ∧ ((ℂ ∖ {0}) × (ℂ ∖ {0})) ⊆ (ℂ × ℂ)) → ( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))) Fn ((ℂ ∖ {0}) × (ℂ ∖ {0}))) | |
9 | 4, 7, 8 | mp2an 691 | . 2 ⊢ ( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))) Fn ((ℂ ∖ {0}) × (ℂ ∖ {0})) |
10 | ovres 7316 | . . . 4 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑦) = (𝑥 · 𝑦)) | |
11 | eldifsn 4680 | . . . . . 6 ⊢ (𝑥 ∈ (ℂ ∖ {0}) ↔ (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0)) | |
12 | eldifsn 4680 | . . . . . 6 ⊢ (𝑦 ∈ (ℂ ∖ {0}) ↔ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) | |
13 | mulcl 10672 | . . . . . . . 8 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑥 · 𝑦) ∈ ℂ) | |
14 | 13 | ad2ant2r 746 | . . . . . . 7 ⊢ (((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) ∧ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) → (𝑥 · 𝑦) ∈ ℂ) |
15 | mulne0 11333 | . . . . . . 7 ⊢ (((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) ∧ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) → (𝑥 · 𝑦) ≠ 0) | |
16 | 14, 15 | jca 515 | . . . . . 6 ⊢ (((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) ∧ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) → ((𝑥 · 𝑦) ∈ ℂ ∧ (𝑥 · 𝑦) ≠ 0)) |
17 | 11, 12, 16 | syl2anb 600 | . . . . 5 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → ((𝑥 · 𝑦) ∈ ℂ ∧ (𝑥 · 𝑦) ≠ 0)) |
18 | eldifsn 4680 | . . . . 5 ⊢ ((𝑥 · 𝑦) ∈ (ℂ ∖ {0}) ↔ ((𝑥 · 𝑦) ∈ ℂ ∧ (𝑥 · 𝑦) ≠ 0)) | |
19 | 17, 18 | sylibr 237 | . . . 4 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥 · 𝑦) ∈ (ℂ ∖ {0})) |
20 | 10, 19 | eqeltrd 2852 | . . 3 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑦) ∈ (ℂ ∖ {0})) |
21 | 20 | rgen2 3132 | . 2 ⊢ ∀𝑥 ∈ (ℂ ∖ {0})∀𝑦 ∈ (ℂ ∖ {0})(𝑥( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑦) ∈ (ℂ ∖ {0}) |
22 | ffnov 7279 | . 2 ⊢ (( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))):((ℂ ∖ {0}) × (ℂ ∖ {0}))⟶(ℂ ∖ {0}) ↔ (( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))) Fn ((ℂ ∖ {0}) × (ℂ ∖ {0})) ∧ ∀𝑥 ∈ (ℂ ∖ {0})∀𝑦 ∈ (ℂ ∖ {0})(𝑥( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑦) ∈ (ℂ ∖ {0}))) | |
23 | 9, 21, 22 | mpbir2an 710 | 1 ⊢ ( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))):((ℂ ∖ {0}) × (ℂ ∖ {0}))⟶(ℂ ∖ {0}) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 399 ∈ wcel 2111 ≠ wne 2951 ∀wral 3070 ∖ cdif 3857 ⊆ wss 3860 {csn 4525 × cxp 5526 ↾ cres 5530 Fn wfn 6335 ⟶wf 6336 (class class class)co 7156 ℂcc 10586 0cc0 10588 · cmul 10593 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2729 ax-sep 5173 ax-nul 5180 ax-pow 5238 ax-pr 5302 ax-un 7465 ax-resscn 10645 ax-1cn 10646 ax-icn 10647 ax-addcl 10648 ax-addrcl 10649 ax-mulcl 10650 ax-mulrcl 10651 ax-mulcom 10652 ax-addass 10653 ax-mulass 10654 ax-distr 10655 ax-i2m1 10656 ax-1ne0 10657 ax-1rid 10658 ax-rnegex 10659 ax-rrecex 10660 ax-cnre 10661 ax-pre-lttri 10662 ax-pre-lttrn 10663 ax-pre-ltadd 10664 ax-pre-mulgt0 10665 ax-mulf 10668 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-fal 1551 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2557 df-eu 2588 df-clab 2736 df-cleq 2750 df-clel 2830 df-nfc 2901 df-ne 2952 df-nel 3056 df-ral 3075 df-rex 3076 df-reu 3077 df-rab 3079 df-v 3411 df-sbc 3699 df-csb 3808 df-dif 3863 df-un 3865 df-in 3867 df-ss 3877 df-nul 4228 df-if 4424 df-pw 4499 df-sn 4526 df-pr 4528 df-op 4532 df-uni 4802 df-iun 4888 df-br 5037 df-opab 5099 df-mpt 5117 df-id 5434 df-po 5447 df-so 5448 df-xp 5534 df-rel 5535 df-cnv 5536 df-co 5537 df-dm 5538 df-rn 5539 df-res 5540 df-ima 5541 df-iota 6299 df-fun 6342 df-fn 6343 df-f 6344 df-f1 6345 df-fo 6346 df-f1o 6347 df-fv 6348 df-riota 7114 df-ov 7159 df-oprab 7160 df-mpo 7161 df-er 8305 df-en 8541 df-dom 8542 df-sdom 8543 df-pnf 10728 df-mnf 10729 df-xr 10730 df-ltxr 10731 df-le 10732 df-sub 10923 df-neg 10924 |
This theorem is referenced by: (None) |
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