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Related theorems GIF version |
| Description: Closure of vector addition in a subspace of a Hilbert space. |
| Ref | Expression |
|---|---|
| shaddclt | ⊢ (H ∈ Sℋ → ((A ∈ H ∧ B ∈ H) → (A +v B) ∈ H)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sh 5116 | . . 3 ⊢ (H ∈ Sℋ ↔ ((H ⊆ ℋ ∧ 0v ∈ H) ∧ (∀x ∈ H ∀y ∈ H (x +v y) ∈ H ∧ ∀x ∈ ℂ ∀y ∈ H (x ·s y) ∈ H))) | |
| 2 | 1 | pm3.27bd 263 | . 2 ⊢ (H ∈ Sℋ → (∀x ∈ H ∀y ∈ H (x +v y) ∈ H ∧ ∀x ∈ ℂ ∀y ∈ H (x ·s y) ∈ H)) |
| 3 | pm3.26 256 | . 2 ⊢ ((∀x ∈ H ∀y ∈ H (x +v y) ∈ H ∧ ∀x ∈ ℂ ∀y ∈ H (x ·s y) ∈ H) → ∀x ∈ H ∀y ∈ H (x +v y) ∈ H) | |
| 4 | opreq1 3006 | . . . 4 ⊢ (x = A → (x +v y) = (A +v y)) | |
| 5 | 4 | eleq1d 1155 | . . 3 ⊢ (x = A → ((x +v y) ∈ H ↔ (A +v y) ∈ H)) |
| 6 | opreq2 3007 | . . . 4 ⊢ (y = B → (A +v y) = (A +v B)) | |
| 7 | 6 | eleq1d 1155 | . . 3 ⊢ (y = B → ((A +v y) ∈ H ↔ (A +v B) ∈ H)) |
| 8 | 5, 7 | rcla42v 1404 | . 2 ⊢ (∀x ∈ H ∀y ∈ H (x +v y) ∈ H → ((A ∈ H ∧ B ∈ H) → (A +v B) ∈ H)) |
| 9 | 2, 3, 8 | 3syl 21 | 1 ⊢ (H ∈ Sℋ → ((A ∈ H ∧ B ∈ H) → (A +v B) ∈ H)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 = wceq 1091 ∈ wcel 1092 ∀wral 1201 ⊆ wss 1487 (class class class)co 3001 ℂcc 4026 ℋ chil 4958 +v cva 4959 ·s csm 4960 0vc0v 4961 Sℋ csh 4967 |
| This theorem is referenced by: shsubclt 5125 projlem18 5210 pjthlem12 5236 shscl 5282 shintcl 5294 shslej 5339 shsidm 5358 spanun 5450 spanunsn 5482 pjadd 5566 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 ax-hilex 4983 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-br 2063 df-opab 2098 df-xp 2424 df-cnv 2426 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fv 2438 df-opr 3003 df-sh 5114 |