Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
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 10882 | . . . . 5 ⊢ · :(ℂ × ℂ)⟶ℂ | |
2 | ffnov 7379 | . . . . 5 ⊢ ( · :(ℂ × ℂ)⟶ℂ ↔ ( · Fn (ℂ × ℂ) ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ ℂ (𝑥 · 𝑦) ∈ ℂ)) | |
3 | 1, 2 | mpbi 229 | . . . 4 ⊢ ( · Fn (ℂ × ℂ) ∧ ∀𝑥 ∈ ℂ ∀𝑦 ∈ ℂ (𝑥 · 𝑦) ∈ ℂ) |
4 | 3 | simpli 483 | . . 3 ⊢ · Fn (ℂ × ℂ) |
5 | difss 4062 | . . . 4 ⊢ (ℂ ∖ {0}) ⊆ ℂ | |
6 | xpss12 5595 | . . . 4 ⊢ (((ℂ ∖ {0}) ⊆ ℂ ∧ (ℂ ∖ {0}) ⊆ ℂ) → ((ℂ ∖ {0}) × (ℂ ∖ {0})) ⊆ (ℂ × ℂ)) | |
7 | 5, 5, 6 | mp2an 688 | . . 3 ⊢ ((ℂ ∖ {0}) × (ℂ ∖ {0})) ⊆ (ℂ × ℂ) |
8 | fnssres 6539 | . . 3 ⊢ (( · Fn (ℂ × ℂ) ∧ ((ℂ ∖ {0}) × (ℂ ∖ {0})) ⊆ (ℂ × ℂ)) → ( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))) Fn ((ℂ ∖ {0}) × (ℂ ∖ {0}))) | |
9 | 4, 7, 8 | mp2an 688 | . 2 ⊢ ( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))) Fn ((ℂ ∖ {0}) × (ℂ ∖ {0})) |
10 | ovres 7416 | . . . 4 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑦) = (𝑥 · 𝑦)) | |
11 | eldifsn 4717 | . . . . . 6 ⊢ (𝑥 ∈ (ℂ ∖ {0}) ↔ (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0)) | |
12 | eldifsn 4717 | . . . . . 6 ⊢ (𝑦 ∈ (ℂ ∖ {0}) ↔ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) | |
13 | mulcl 10886 | . . . . . . . 8 ⊢ ((𝑥 ∈ ℂ ∧ 𝑦 ∈ ℂ) → (𝑥 · 𝑦) ∈ ℂ) | |
14 | 13 | ad2ant2r 743 | . . . . . . 7 ⊢ (((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) ∧ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) → (𝑥 · 𝑦) ∈ ℂ) |
15 | mulne0 11547 | . . . . . . 7 ⊢ (((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) ∧ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) → (𝑥 · 𝑦) ≠ 0) | |
16 | 14, 15 | jca 511 | . . . . . 6 ⊢ (((𝑥 ∈ ℂ ∧ 𝑥 ≠ 0) ∧ (𝑦 ∈ ℂ ∧ 𝑦 ≠ 0)) → ((𝑥 · 𝑦) ∈ ℂ ∧ (𝑥 · 𝑦) ≠ 0)) |
17 | 11, 12, 16 | syl2anb 597 | . . . . 5 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → ((𝑥 · 𝑦) ∈ ℂ ∧ (𝑥 · 𝑦) ≠ 0)) |
18 | eldifsn 4717 | . . . . 5 ⊢ ((𝑥 · 𝑦) ∈ (ℂ ∖ {0}) ↔ ((𝑥 · 𝑦) ∈ ℂ ∧ (𝑥 · 𝑦) ≠ 0)) | |
19 | 17, 18 | sylibr 233 | . . . 4 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥 · 𝑦) ∈ (ℂ ∖ {0})) |
20 | 10, 19 | eqeltrd 2839 | . . 3 ⊢ ((𝑥 ∈ (ℂ ∖ {0}) ∧ 𝑦 ∈ (ℂ ∖ {0})) → (𝑥( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑦) ∈ (ℂ ∖ {0})) |
21 | 20 | rgen2 3126 | . 2 ⊢ ∀𝑥 ∈ (ℂ ∖ {0})∀𝑦 ∈ (ℂ ∖ {0})(𝑥( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0})))𝑦) ∈ (ℂ ∖ {0}) |
22 | ffnov 7379 | . 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 707 | 1 ⊢ ( · ↾ ((ℂ ∖ {0}) × (ℂ ∖ {0}))):((ℂ ∖ {0}) × (ℂ ∖ {0}))⟶(ℂ ∖ {0}) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 395 ∈ wcel 2108 ≠ wne 2942 ∀wral 3063 ∖ cdif 3880 ⊆ wss 3883 {csn 4558 × cxp 5578 ↾ cres 5582 Fn wfn 6413 ⟶wf 6414 (class class class)co 7255 ℂcc 10800 0cc0 10802 · cmul 10807 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-mulf 10882 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-po 5494 df-so 5495 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |