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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 11286 and consequence of mulne0bd 11285. (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 11285 | . . 3 ⊢ (𝜑 → ((𝐴 ≠ 0 ∧ 𝐵 ≠ 0) ↔ (𝐴 · 𝐵) ≠ 0)) |
5 | 1, 4 | mpbird 259 | . 2 ⊢ (𝜑 → (𝐴 ≠ 0 ∧ 𝐵 ≠ 0)) |
6 | 5 | simpld 497 | 1 ⊢ (𝜑 → 𝐴 ≠ 0) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∈ wcel 2110 ≠ wne 3016 (class class class)co 7150 ℂcc 10529 0cc0 10531 · cmul 10536 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 ax-un 7455 ax-resscn 10588 ax-1cn 10589 ax-icn 10590 ax-addcl 10591 ax-addrcl 10592 ax-mulcl 10593 ax-mulrcl 10594 ax-mulcom 10595 ax-addass 10596 ax-mulass 10597 ax-distr 10598 ax-i2m1 10599 ax-1ne0 10600 ax-1rid 10601 ax-rnegex 10602 ax-rrecex 10603 ax-cnre 10604 ax-pre-lttri 10605 ax-pre-lttrn 10606 ax-pre-ltadd 10607 ax-pre-mulgt0 10608 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-reu 3145 df-rab 3147 df-v 3496 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4561 df-pr 4563 df-op 4567 df-uni 4832 df-br 5059 df-opab 5121 df-mpt 5139 df-id 5454 df-po 5468 df-so 5469 df-xp 5555 df-rel 5556 df-cnv 5557 df-co 5558 df-dm 5559 df-rn 5560 df-res 5561 df-ima 5562 df-iota 6308 df-fun 6351 df-fn 6352 df-f 6353 df-f1 6354 df-fo 6355 df-f1o 6356 df-fv 6357 df-riota 7108 df-ov 7153 df-oprab 7154 df-mpo 7155 df-er 8283 df-en 8504 df-dom 8505 df-sdom 8506 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 df-sub 10866 df-neg 10867 |
This theorem is referenced by: chordthmlem2 25405 sgnmul 31795 sgnsub 31797 signsvfpn 31850 signsvfnn 31851 knoppndvlem16 33861 knoppndvlem19 33864 dirkertrigeqlem2 42378 |
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