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Mirrors > Home > MPE Home > Th. List > mulne0bad | Structured version Visualization version GIF version |
Description: A factor of a nonzero complex number is nonzero. Partial converse of mulne0d 11627 and consequence of mulne0bd 11626. (Contributed by David Moews, 28-Feb-2017.) |
Ref | Expression |
---|---|
mulne0bad.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
mulne0bad.2 | ⊢ (𝜑 → 𝐵 ∈ ℂ) |
mulne0bad.3 | ⊢ (𝜑 → (𝐴 · 𝐵) ≠ 0) |
Ref | Expression |
---|---|
mulne0bad | ⊢ (𝜑 → 𝐴 ≠ 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mulne0bad.3 | . . 3 ⊢ (𝜑 → (𝐴 · 𝐵) ≠ 0) | |
2 | mulne0bad.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
3 | mulne0bad.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ ℂ) | |
4 | 2, 3 | mulne0bd 11626 | . . 3 ⊢ (𝜑 → ((𝐴 ≠ 0 ∧ 𝐵 ≠ 0) ↔ (𝐴 · 𝐵) ≠ 0)) |
5 | 1, 4 | mpbird 256 | . 2 ⊢ (𝜑 → (𝐴 ≠ 0 ∧ 𝐵 ≠ 0)) |
6 | 5 | simpld 495 | 1 ⊢ (𝜑 → 𝐴 ≠ 0) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 ∈ wcel 2106 ≠ wne 2943 (class class class)co 7275 ℂcc 10869 0cc0 10871 · cmul 10876 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-po 5503 df-so 5504 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 |
This theorem is referenced by: chordthmlem2 25983 sgnmul 32509 sgnsub 32511 signsvfpn 32564 signsvfnn 32565 knoppndvlem16 34707 knoppndvlem19 34710 dirkertrigeqlem2 43640 |
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