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| Mirrors > Home > HSE Home > Th. List > hial2eq | Structured version Visualization version GIF version | ||
| Description: Two vectors whose inner product is always equal are equal. (Contributed by NM, 16-Nov-1999.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| hial2eq | ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (∀𝑥 ∈ ℋ (𝐴 ·ih 𝑥) = (𝐵 ·ih 𝑥) ↔ 𝐴 = 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | hvsubcl 31220 | . . . 4 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (𝐴 −ℎ 𝐵) ∈ ℋ) | |
| 2 | oveq2 7404 | . . . . . 6 ⊢ (𝑥 = (𝐴 −ℎ 𝐵) → (𝐴 ·ih 𝑥) = (𝐴 ·ih (𝐴 −ℎ 𝐵))) | |
| 3 | oveq2 7404 | . . . . . 6 ⊢ (𝑥 = (𝐴 −ℎ 𝐵) → (𝐵 ·ih 𝑥) = (𝐵 ·ih (𝐴 −ℎ 𝐵))) | |
| 4 | 2, 3 | eqeq12d 2778 | . . . . 5 ⊢ (𝑥 = (𝐴 −ℎ 𝐵) → ((𝐴 ·ih 𝑥) = (𝐵 ·ih 𝑥) ↔ (𝐴 ·ih (𝐴 −ℎ 𝐵)) = (𝐵 ·ih (𝐴 −ℎ 𝐵)))) |
| 5 | 4 | rspcv 3577 | . . . 4 ⊢ ((𝐴 −ℎ 𝐵) ∈ ℋ → (∀𝑥 ∈ ℋ (𝐴 ·ih 𝑥) = (𝐵 ·ih 𝑥) → (𝐴 ·ih (𝐴 −ℎ 𝐵)) = (𝐵 ·ih (𝐴 −ℎ 𝐵)))) |
| 6 | 1, 5 | syl 17 | . . 3 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (∀𝑥 ∈ ℋ (𝐴 ·ih 𝑥) = (𝐵 ·ih 𝑥) → (𝐴 ·ih (𝐴 −ℎ 𝐵)) = (𝐵 ·ih (𝐴 −ℎ 𝐵)))) |
| 7 | hi2eq 31308 | . . 3 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → ((𝐴 ·ih (𝐴 −ℎ 𝐵)) = (𝐵 ·ih (𝐴 −ℎ 𝐵)) ↔ 𝐴 = 𝐵)) | |
| 8 | 6, 7 | sylibd 241 | . 2 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (∀𝑥 ∈ ℋ (𝐴 ·ih 𝑥) = (𝐵 ·ih 𝑥) → 𝐴 = 𝐵)) |
| 9 | oveq1 7403 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐴 ·ih 𝑥) = (𝐵 ·ih 𝑥)) | |
| 10 | 9 | ralrimivw 3158 | . 2 ⊢ (𝐴 = 𝐵 → ∀𝑥 ∈ ℋ (𝐴 ·ih 𝑥) = (𝐵 ·ih 𝑥)) |
| 11 | 8, 10 | impbid1 227 | 1 ⊢ ((𝐴 ∈ ℋ ∧ 𝐵 ∈ ℋ) → (∀𝑥 ∈ ℋ (𝐴 ·ih 𝑥) = (𝐵 ·ih 𝑥) ↔ 𝐴 = 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 = wceq 1560 ∈ wcel 2142 ∀wral 3076 (class class class)co 7396 ℋchba 31122 ·ih csp 31125 −ℎ cmv 31128 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5246 ax-nul 5256 ax-pow 5322 ax-pr 5390 ax-un 7718 ax-resscn 11130 ax-1cn 11131 ax-icn 11132 ax-addcl 11133 ax-addrcl 11134 ax-mulcl 11135 ax-mulrcl 11136 ax-mulcom 11137 ax-addass 11138 ax-mulass 11139 ax-distr 11140 ax-i2m1 11141 ax-1ne0 11142 ax-1rid 11143 ax-rnegex 11144 ax-rrecex 11145 ax-cnre 11146 ax-pre-lttri 11147 ax-pre-lttrn 11148 ax-pre-ltadd 11149 ax-hfvadd 31203 ax-hvcom 31204 ax-hvass 31205 ax-hv0cl 31206 ax-hvaddid 31207 ax-hfvmul 31208 ax-hvmulid 31209 ax-hvdistr2 31212 ax-hvmul0 31213 ax-hfi 31282 ax-his2 31286 ax-his3 31287 ax-his4 31288 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1099 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-nf 1804 df-sb 2091 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3368 df-rab 3415 df-v 3456 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5542 df-po 5555 df-so 5556 df-xp 5653 df-rel 5654 df-cnv 5655 df-co 5656 df-dm 5657 df-rn 5658 df-res 5659 df-ima 5660 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-er 8678 df-en 8928 df-dom 8929 df-sdom 8930 df-pnf 11218 df-mnf 11219 df-ltxr 11221 df-sub 11416 df-neg 11417 df-hvsub 31174 |
| This theorem is referenced by: hial2eq2 31310 hoeq1 32033 hoeq2 32034 unoplin 32123 hmoplin 32145 pjss2coi 32367 pj3cor1i 32412 |
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