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| Mirrors > Home > MPE Home > Th. List > absne0d | Structured version Visualization version GIF version | ||
| Description: The absolute value of a number is zero iff the number is zero. Proposition 10-3.7(c) of [Gleason] p. 133. (Contributed by Mario Carneiro, 29-May-2016.) |
| Ref | Expression |
|---|---|
| abscld.1 | ⊢ (𝜑 → 𝐴 ∈ ℂ) |
| absne0d.2 | ⊢ (𝜑 → 𝐴 ≠ 0) |
| Ref | Expression |
|---|---|
| absne0d | ⊢ (𝜑 → (abs‘𝐴) ≠ 0) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | absne0d.2 | . 2 ⊢ (𝜑 → 𝐴 ≠ 0) | |
| 2 | abscld.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℂ) | |
| 3 | 2 | abs00ad 15327 | . . 3 ⊢ (𝜑 → ((abs‘𝐴) = 0 ↔ 𝐴 = 0)) |
| 4 | 3 | necon3bid 3002 | . 2 ⊢ (𝜑 → ((abs‘𝐴) ≠ 0 ↔ 𝐴 ≠ 0)) |
| 5 | 1, 4 | mpbird 259 | 1 ⊢ (𝜑 → (abs‘𝐴) ≠ 0) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2143 ≠ wne 2958 ‘cfv 6521 ℂcc 11082 0cc0 11084 abscabs 15271 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1816 ax-4 1830 ax-5 1931 ax-6 1988 ax-7 2029 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5247 ax-nul 5257 ax-pow 5323 ax-pr 5391 ax-un 7718 ax-cnex 11140 ax-resscn 11141 ax-1cn 11142 ax-icn 11143 ax-addcl 11144 ax-addrcl 11145 ax-mulcl 11146 ax-mulrcl 11147 ax-mulcom 11148 ax-addass 11149 ax-mulass 11150 ax-distr 11151 ax-i2m1 11152 ax-1ne0 11153 ax-1rid 11154 ax-rnegex 11155 ax-rrecex 11156 ax-cnre 11157 ax-pre-lttri 11158 ax-pre-lttrn 11159 ax-pre-ltadd 11160 ax-pre-mulgt0 11161 ax-pre-sup 11162 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1564 df-fal 1574 df-ex 1801 df-nf 1805 df-sb 2092 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3457 df-sbc 3746 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5102 df-opab 5164 df-mpt 5183 df-tr 5209 df-id 5543 df-eprel 5548 df-po 5556 df-so 5557 df-fr 5601 df-we 5603 df-xp 5654 df-rel 5655 df-cnv 5656 df-co 5657 df-dm 5658 df-rn 5659 df-res 5660 df-ima 5661 df-pred 6288 df-ord 6349 df-on 6350 df-lim 6351 df-suc 6352 df-iota 6477 df-fun 6523 df-fn 6524 df-f 6525 df-f1 6526 df-fo 6527 df-f1o 6528 df-fv 6529 df-riota 7353 df-ov 7399 df-oprab 7400 df-mpo 7401 df-om 7847 df-2nd 7971 df-frecs 8262 df-wrecs 8293 df-recs 8342 df-rdg 8381 df-er 8678 df-en 8928 df-dom 8929 df-sdom 8930 df-sup 9386 df-pnf 11229 df-mnf 11230 df-xr 11231 df-ltxr 11232 df-le 11233 df-sub 11427 df-neg 11428 df-div 11856 df-nn 12221 df-2 12290 df-3 12291 df-n0 12492 df-z 12579 df-uz 12850 df-rp 13004 df-seq 14025 df-exp 14085 df-cj 15136 df-re 15137 df-im 15138 df-sqrt 15272 df-abs 15273 |
| This theorem is referenced by: lcmid 16653 prmirredlem 21531 cphsqrtcl2 25255 eff1olem 26620 cosargd 26680 cosarg0d 26681 cosangneg2d 26879 lawcoslem1 26887 lawcos 26888 isosctrlem3 26892 ssscongptld 26894 constrrtcclem 34033 constrdircl 34064 constrinvcl 34072 constrsqrtcl 34078 knoppndvlem14 36968 knoppndvlem17 36971 readvrec 42976 readvcot 42978 pellexlem6 43416 0ellimcdiv 46214 etransclem44 46843 |
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