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| Mirrors > Home > HSE Home > Th. List > orthcom | Structured version Visualization version GIF version | ||
| Description: Orthogonality commutes. (Contributed by NM, 10-Oct-1999.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| orthcom | ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((𝐴 ·ih 𝐵) = 0 ↔ (𝐵 ·ih 𝐴) = 0)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fveq2 6873 | . . . 4 ⊢ ((𝐴 ·ih 𝐵) = 0 → (∗‘(𝐴 ·ih 𝐵)) = (∗‘0)) | |
| 2 | cj0 15166 | . . . 4 ⊢ (∗‘0) = 0 | |
| 3 | 1, 2 | eqtrdi 2785 | . . 3 ⊢ ((𝐴 ·ih 𝐵) = 0 → (∗‘(𝐴 ·ih 𝐵)) = 0) |
| 4 | ax-his1 30997 | . . . . 5 ⊢ ((𝐵 ∈ ℋ ∧ 𝐴 ∈ ℋ) → (𝐵 ·ih 𝐴) = (∗‘(𝐴 ·ih 𝐵))) | |
| 5 | 4 | ancoms 458 | . . . 4 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (𝐵 ·ih 𝐴) = (∗‘(𝐴 ·ih 𝐵))) |
| 6 | 5 | eqeq1d 2736 | . . 3 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((𝐵 ·ih 𝐴) = 0 ↔ (∗‘(𝐴 ·ih 𝐵)) = 0)) |
| 7 | 3, 6 | imbitrrid 246 | . 2 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((𝐴 ·ih 𝐵) = 0 → (𝐵 ·ih 𝐴) = 0)) |
| 8 | fveq2 6873 | . . . 4 ⊢ ((𝐵 ·ih 𝐴) = 0 → (∗‘(𝐵 ·ih 𝐴)) = (∗‘0)) | |
| 9 | 8, 2 | eqtrdi 2785 | . . 3 ⊢ ((𝐵 ·ih 𝐴) = 0 → (∗‘(𝐵 ·ih 𝐴)) = 0) |
| 10 | ax-his1 30997 | . . . 4 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (𝐴 ·ih 𝐵) = (∗‘(𝐵 ·ih 𝐴))) | |
| 11 | 10 | eqeq1d 2736 | . . 3 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((𝐴 ·ih 𝐵) = 0 ↔ (∗‘(𝐵 ·ih 𝐴)) = 0)) |
| 12 | 9, 11 | imbitrrid 246 | . 2 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((𝐵 ·ih 𝐴) = 0 → (𝐴 ·ih 𝐵) = 0)) |
| 13 | 7, 12 | impbid 212 | 1 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((𝐴 ·ih 𝐵) = 0 ↔ (𝐵 ·ih 𝐴) = 0)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1539 ∈ wcel 2107 ‘cfv 6528 (class class class)co 7400 0cc0 11122 ∗ccj 15104 ℋchba 30834 ·ih csp 30837 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1794 ax-4 1808 ax-5 1909 ax-6 1966 ax-7 2006 ax-8 2109 ax-9 2117 ax-10 2140 ax-11 2156 ax-12 2176 ax-ext 2706 ax-sep 5264 ax-nul 5274 ax-pow 5333 ax-pr 5400 ax-un 7724 ax-resscn 11179 ax-1cn 11180 ax-icn 11181 ax-addcl 11182 ax-addrcl 11183 ax-mulcl 11184 ax-mulrcl 11185 ax-mulcom 11186 ax-addass 11187 ax-mulass 11188 ax-distr 11189 ax-i2m1 11190 ax-1ne0 11191 ax-1rid 11192 ax-rnegex 11193 ax-rrecex 11194 ax-cnre 11195 ax-pre-lttri 11196 ax-pre-lttrn 11197 ax-pre-ltadd 11198 ax-pre-mulgt0 11199 ax-his1 30997 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1779 df-nf 1783 df-sb 2064 df-mo 2538 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2808 df-nfc 2884 df-ne 2932 df-nel 3036 df-ral 3051 df-rex 3060 df-rmo 3357 df-reu 3358 df-rab 3414 df-v 3459 df-sbc 3764 df-csb 3873 df-dif 3927 df-un 3929 df-in 3931 df-ss 3941 df-pss 3944 df-nul 4307 df-if 4499 df-pw 4575 df-sn 4600 df-pr 4602 df-op 4606 df-uni 4882 df-iun 4967 df-br 5118 df-opab 5180 df-mpt 5200 df-tr 5228 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-pred 6288 df-ord 6353 df-on 6354 df-lim 6355 df-suc 6356 df-iota 6481 df-fun 6530 df-fn 6531 df-f 6532 df-f1 6533 df-fo 6534 df-f1o 6535 df-fv 6536 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-om 7857 df-2nd 7984 df-frecs 8275 df-wrecs 8306 df-recs 8380 df-rdg 8419 df-er 8714 df-en 8955 df-dom 8956 df-sdom 8957 df-pnf 11264 df-mnf 11265 df-xr 11266 df-ltxr 11267 df-le 11268 df-sub 11461 df-neg 11462 df-div 11888 df-nn 12234 df-2 12296 df-cj 15107 df-re 15108 df-im 15109 |
| This theorem is referenced by: normpythi 31057 ocorth 31206 shorth 31210 h1dei 31465 h1de2i 31468 pjspansn 31492 |
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