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Mirrors > Home > MPE Home > Th. List > cjne0 | Structured version Visualization version GIF version |
Description: A number is nonzero iff its complex conjugate is nonzero. (Contributed by NM, 29-Apr-2005.) |
Ref | Expression |
---|---|
cjne0 | ⊢ (𝐴 ∈ ℂ → (𝐴 ≠ 0 ↔ (∗‘𝐴) ≠ 0)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cj0 14507 | . . . 4 ⊢ (∗‘0) = 0 | |
2 | 1 | eqeq2i 2834 | . . 3 ⊢ ((∗‘𝐴) = (∗‘0) ↔ (∗‘𝐴) = 0) |
3 | 0cn 10622 | . . . 4 ⊢ 0 ∈ ℂ | |
4 | cj11 14511 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 0 ∈ ℂ) → ((∗‘𝐴) = (∗‘0) ↔ 𝐴 = 0)) | |
5 | 3, 4 | mpan2 687 | . . 3 ⊢ (𝐴 ∈ ℂ → ((∗‘𝐴) = (∗‘0) ↔ 𝐴 = 0)) |
6 | 2, 5 | syl5rbbr 287 | . 2 ⊢ (𝐴 ∈ ℂ → (𝐴 = 0 ↔ (∗‘𝐴) = 0)) |
7 | 6 | necon3bid 3060 | 1 ⊢ (𝐴 ∈ ℂ → (𝐴 ≠ 0 ↔ (∗‘𝐴) ≠ 0)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 207 = wceq 1528 ∈ wcel 2105 ≠ wne 3016 ‘cfv 6349 ℂcc 10524 0cc0 10526 ∗ccj 14445 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 ax-un 7450 ax-resscn 10583 ax-1cn 10584 ax-icn 10585 ax-addcl 10586 ax-addrcl 10587 ax-mulcl 10588 ax-mulrcl 10589 ax-mulcom 10590 ax-addass 10591 ax-mulass 10592 ax-distr 10593 ax-i2m1 10594 ax-1ne0 10595 ax-1rid 10596 ax-rnegex 10597 ax-rrecex 10598 ax-cnre 10599 ax-pre-lttri 10600 ax-pre-lttrn 10601 ax-pre-ltadd 10602 ax-pre-mulgt0 10603 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 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-rmo 3146 df-rab 3147 df-v 3497 df-sbc 3772 df-csb 3883 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4466 df-pw 4539 df-sn 4560 df-pr 4562 df-op 4566 df-uni 4833 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 7103 df-ov 7148 df-oprab 7149 df-mpo 7150 df-er 8279 df-en 8499 df-dom 8500 df-sdom 8501 df-pnf 10666 df-mnf 10667 df-xr 10668 df-ltxr 10669 df-le 10670 df-sub 10861 df-neg 10862 df-div 11287 df-2 11689 df-cj 14448 df-re 14449 df-im 14450 |
This theorem is referenced by: cjdiv 14513 cjne0d 14552 recval 14672 logcj 25116 |
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