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Mirrors > Home > HSE Home > Th. List > hiidge0 | Structured version Visualization version GIF version |
Description: Inner product with self is not negative. (Contributed by NM, 29-May-1999.) (New usage is discouraged.) |
Ref | Expression |
---|---|
hiidge0 | ⊢ (𝐴 ∈ ℋ → 0 ≤ (𝐴 ·ih 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm2.1 893 | . . 3 ⊢ (¬ 𝐴 = 0ℎ ∨ 𝐴 = 0ℎ) | |
2 | df-ne 3017 | . . . . . 6 ⊢ (𝐴 ≠ 0ℎ ↔ ¬ 𝐴 = 0ℎ) | |
3 | ax-his4 28861 | . . . . . 6 ⊢ ((𝐴 ∈ ℋ ∧ 𝐴 ≠ 0ℎ) → 0 < (𝐴 ·ih 𝐴)) | |
4 | 2, 3 | sylan2br 596 | . . . . 5 ⊢ ((𝐴 ∈ ℋ ∧ ¬ 𝐴 = 0ℎ) → 0 < (𝐴 ·ih 𝐴)) |
5 | 4 | ex 415 | . . . 4 ⊢ (𝐴 ∈ ℋ → (¬ 𝐴 = 0ℎ → 0 < (𝐴 ·ih 𝐴))) |
6 | oveq1 7162 | . . . . . . 7 ⊢ (𝐴 = 0ℎ → (𝐴 ·ih 𝐴) = (0ℎ ·ih 𝐴)) | |
7 | hi01 28872 | . . . . . . 7 ⊢ (𝐴 ∈ ℋ → (0ℎ ·ih 𝐴) = 0) | |
8 | 6, 7 | sylan9eqr 2878 | . . . . . 6 ⊢ ((𝐴 ∈ ℋ ∧ 𝐴 = 0ℎ) → (𝐴 ·ih 𝐴) = 0) |
9 | 8 | eqcomd 2827 | . . . . 5 ⊢ ((𝐴 ∈ ℋ ∧ 𝐴 = 0ℎ) → 0 = (𝐴 ·ih 𝐴)) |
10 | 9 | ex 415 | . . . 4 ⊢ (𝐴 ∈ ℋ → (𝐴 = 0ℎ → 0 = (𝐴 ·ih 𝐴))) |
11 | 5, 10 | orim12d 961 | . . 3 ⊢ (𝐴 ∈ ℋ → ((¬ 𝐴 = 0ℎ ∨ 𝐴 = 0ℎ) → (0 < (𝐴 ·ih 𝐴) ∨ 0 = (𝐴 ·ih 𝐴)))) |
12 | 1, 11 | mpi 20 | . 2 ⊢ (𝐴 ∈ ℋ → (0 < (𝐴 ·ih 𝐴) ∨ 0 = (𝐴 ·ih 𝐴))) |
13 | 0re 10642 | . . 3 ⊢ 0 ∈ ℝ | |
14 | hiidrcl 28871 | . . 3 ⊢ (𝐴 ∈ ℋ → (𝐴 ·ih 𝐴) ∈ ℝ) | |
15 | leloe 10726 | . . 3 ⊢ ((0 ∈ ℝ ∧ (𝐴 ·ih 𝐴) ∈ ℝ) → (0 ≤ (𝐴 ·ih 𝐴) ↔ (0 < (𝐴 ·ih 𝐴) ∨ 0 = (𝐴 ·ih 𝐴)))) | |
16 | 13, 14, 15 | sylancr 589 | . 2 ⊢ (𝐴 ∈ ℋ → (0 ≤ (𝐴 ·ih 𝐴) ↔ (0 < (𝐴 ·ih 𝐴) ∨ 0 = (𝐴 ·ih 𝐴)))) |
17 | 12, 16 | mpbird 259 | 1 ⊢ (𝐴 ∈ ℋ → 0 ≤ (𝐴 ·ih 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∧ wa 398 ∨ wo 843 = wceq 1533 ∈ wcel 2110 ≠ wne 3016 class class class wbr 5065 (class class class)co 7155 ℝcr 10535 0cc0 10536 < clt 10674 ≤ cle 10675 ℋchba 28695 ·ih csp 28698 0ℎc0v 28700 |
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 5202 ax-nul 5209 ax-pow 5265 ax-pr 5329 ax-un 7460 ax-resscn 10593 ax-1cn 10594 ax-icn 10595 ax-addcl 10596 ax-addrcl 10597 ax-mulcl 10598 ax-mulrcl 10599 ax-mulcom 10600 ax-addass 10601 ax-mulass 10602 ax-distr 10603 ax-i2m1 10604 ax-1ne0 10605 ax-1rid 10606 ax-rnegex 10607 ax-rrecex 10608 ax-cnre 10609 ax-pre-lttri 10610 ax-pre-lttrn 10611 ax-pre-ltadd 10612 ax-pre-mulgt0 10613 ax-hv0cl 28779 ax-hvmul0 28786 ax-hfi 28855 ax-his1 28858 ax-his3 28860 ax-his4 28861 |
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-rmo 3146 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 4567 df-pr 4569 df-op 4573 df-uni 4838 df-iun 4920 df-br 5066 df-opab 5128 df-mpt 5146 df-id 5459 df-po 5473 df-so 5474 df-xp 5560 df-rel 5561 df-cnv 5562 df-co 5563 df-dm 5564 df-rn 5565 df-res 5566 df-ima 5567 df-iota 6313 df-fun 6356 df-fn 6357 df-f 6358 df-f1 6359 df-fo 6360 df-f1o 6361 df-fv 6362 df-riota 7113 df-ov 7158 df-oprab 7159 df-mpo 7160 df-er 8288 df-en 8509 df-dom 8510 df-sdom 8511 df-pnf 10676 df-mnf 10677 df-xr 10678 df-ltxr 10679 df-le 10680 df-sub 10871 df-neg 10872 df-div 11297 df-2 11699 df-cj 14457 df-re 14458 df-im 14459 |
This theorem is referenced by: normlem5 28890 normlem6 28891 normlem7 28892 normf 28899 normge0 28902 normgt0 28903 normsqi 28908 norm-ii-i 28913 norm-iii-i 28915 bcsiALT 28955 pjhthlem1 29167 cnlnadjlem7 29849 branmfn 29881 leopsq 29905 idleop 29907 |
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