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| Mirrors > Home > HSE Home > Th. List > his6 | Structured version Visualization version GIF version | ||
| Description: Zero inner product with self means vector is zero. Lemma 3.1(S6) of [Beran] p. 95. (Contributed by NM, 27-Jul-1999.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| his6 | ⊢ (𝐴 ∈ ℋ → ((𝐴 ·ih 𝐴) = 0 ↔ 𝐴 = 0ℎ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-his4 31174 | . . . . 5 ⊢ ((𝐴 ∈ ℋ ∧ 𝐴 ≠ 0ℎ) → 0 < (𝐴 ·ih 𝐴)) | |
| 2 | 1 | gt0ne0d 11708 | . . . 4 ⊢ ((𝐴 ∈ ℋ ∧ 𝐴 ≠ 0ℎ) → (𝐴 ·ih 𝐴) ≠ 0) |
| 3 | 2 | ex 412 | . . 3 ⊢ (𝐴 ∈ ℋ → (𝐴 ≠ 0ℎ → (𝐴 ·ih 𝐴) ≠ 0)) |
| 4 | 3 | necon4d 2957 | . 2 ⊢ (𝐴 ∈ ℋ → ((𝐴 ·ih 𝐴) = 0 → 𝐴 = 0ℎ)) |
| 5 | hi01 31185 | . . 3 ⊢ (𝐴 ∈ ℋ → (0ℎ ·ih 𝐴) = 0) | |
| 6 | oveq1 7368 | . . . 4 ⊢ (𝐴 = 0ℎ → (𝐴 ·ih 𝐴) = (0ℎ ·ih 𝐴)) | |
| 7 | 6 | eqeq1d 2739 | . . 3 ⊢ (𝐴 = 0ℎ → ((𝐴 ·ih 𝐴) = 0 ↔ (0ℎ ·ih 𝐴) = 0)) |
| 8 | 5, 7 | syl5ibrcom 247 | . 2 ⊢ (𝐴 ∈ ℋ → (𝐴 = 0ℎ → (𝐴 ·ih 𝐴) = 0)) |
| 9 | 4, 8 | impbid 212 | 1 ⊢ (𝐴 ∈ ℋ → ((𝐴 ·ih 𝐴) = 0 ↔ 𝐴 = 0ℎ)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 (class class class)co 7361 0cc0 11032 ℋchba 31008 ·ih csp 31011 0ℎc0v 31013 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-resscn 11089 ax-1cn 11090 ax-icn 11091 ax-addcl 11092 ax-addrcl 11093 ax-mulcl 11094 ax-mulrcl 11095 ax-mulcom 11096 ax-addass 11097 ax-mulass 11098 ax-distr 11099 ax-i2m1 11100 ax-1ne0 11101 ax-1rid 11102 ax-rnegex 11103 ax-rrecex 11104 ax-cnre 11105 ax-pre-lttri 11106 ax-pre-lttrn 11107 ax-pre-ltadd 11108 ax-hv0cl 31092 ax-hvmul0 31099 ax-hfi 31168 ax-his3 31173 ax-his4 31174 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5520 df-po 5533 df-so 5534 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-ov 7364 df-er 8637 df-en 8888 df-dom 8889 df-sdom 8890 df-pnf 11175 df-mnf 11176 df-ltxr 11178 |
| This theorem is referenced by: hial0 31191 hial02 31192 hi2eq 31194 bcseqi 31209 ocin 31385 h1de2bi 31643 h1de2ctlem 31644 normcan 31665 unopf1o 32005 riesz3i 32151 |
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