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| Mirrors > Home > HSE Home > Th. List > spanval | Structured version Visualization version GIF version | ||
| Description: Value of the linear span of a subset of Hilbert space. The span is the intersection of all subspaces constraining the subset. Definition of span in [Schechter] p. 276. (Contributed by NM, 2-Jun-2004.) (Revised by Mario Carneiro, 23-Dec-2013.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| spanval | ⊢ (𝐴 ⊆ ℋ → (span‘𝐴) = ∩ {𝑥 ∈ Sℋ ∣ 𝐴 ⊆ 𝑥}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-span 31328 | . 2 ⊢ span = (𝑦 ∈ 𝒫 ℋ ↦ ∩ {𝑥 ∈ Sℋ ∣ 𝑦 ⊆ 𝑥}) | |
| 2 | sseq1 4009 | . . . 4 ⊢ (𝑦 = 𝐴 → (𝑦 ⊆ 𝑥 ↔ 𝐴 ⊆ 𝑥)) | |
| 3 | 2 | rabbidv 3444 | . . 3 ⊢ (𝑦 = 𝐴 → {𝑥 ∈ Sℋ ∣ 𝑦 ⊆ 𝑥} = {𝑥 ∈ Sℋ ∣ 𝐴 ⊆ 𝑥}) |
| 4 | 3 | inteqd 4951 | . 2 ⊢ (𝑦 = 𝐴 → ∩ {𝑥 ∈ Sℋ ∣ 𝑦 ⊆ 𝑥} = ∩ {𝑥 ∈ Sℋ ∣ 𝐴 ⊆ 𝑥}) |
| 5 | ax-hilex 31018 | . . . 4 ⊢ ℋ ∈ V | |
| 6 | 5 | elpw2 5334 | . . 3 ⊢ (𝐴 ∈ 𝒫 ℋ ↔ 𝐴 ⊆ ℋ) |
| 7 | 6 | biimpri 228 | . 2 ⊢ (𝐴 ⊆ ℋ → 𝐴 ∈ 𝒫 ℋ) |
| 8 | helsh 31264 | . . . 4 ⊢ ℋ ∈ Sℋ | |
| 9 | sseq2 4010 | . . . . 5 ⊢ (𝑥 = ℋ → (𝐴 ⊆ 𝑥 ↔ 𝐴 ⊆ ℋ)) | |
| 10 | 9 | rspcev 3622 | . . . 4 ⊢ (( ℋ ∈ Sℋ ∧ 𝐴 ⊆ ℋ) → ∃𝑥 ∈ Sℋ 𝐴 ⊆ 𝑥) |
| 11 | 8, 10 | mpan 690 | . . 3 ⊢ (𝐴 ⊆ ℋ → ∃𝑥 ∈ Sℋ 𝐴 ⊆ 𝑥) |
| 12 | intexrab 5347 | . . 3 ⊢ (∃𝑥 ∈ Sℋ 𝐴 ⊆ 𝑥 ↔ ∩ {𝑥 ∈ Sℋ ∣ 𝐴 ⊆ 𝑥} ∈ V) | |
| 13 | 11, 12 | sylib 218 | . 2 ⊢ (𝐴 ⊆ ℋ → ∩ {𝑥 ∈ Sℋ ∣ 𝐴 ⊆ 𝑥} ∈ V) |
| 14 | 1, 4, 7, 13 | fvmptd3 7039 | 1 ⊢ (𝐴 ⊆ ℋ → (span‘𝐴) = ∩ {𝑥 ∈ Sℋ ∣ 𝐴 ⊆ 𝑥}) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2108 ∃wrex 3070 {crab 3436 Vcvv 3480 ⊆ wss 3951 𝒫 cpw 4600 ∩ cint 4946 ‘cfv 6561 ℋchba 30938 Sℋ csh 30947 spancspn 30951 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2708 ax-rep 5279 ax-sep 5296 ax-nul 5306 ax-pow 5365 ax-pr 5432 ax-un 7755 ax-cnex 11211 ax-1cn 11213 ax-addcl 11215 ax-hilex 31018 ax-hfvadd 31019 ax-hv0cl 31022 ax-hfvmul 31024 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2540 df-eu 2569 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2892 df-ne 2941 df-ral 3062 df-rex 3071 df-reu 3381 df-rab 3437 df-v 3482 df-sbc 3789 df-csb 3900 df-dif 3954 df-un 3956 df-in 3958 df-ss 3968 df-pss 3971 df-nul 4334 df-if 4526 df-pw 4602 df-sn 4627 df-pr 4629 df-op 4633 df-uni 4908 df-int 4947 df-iun 4993 df-br 5144 df-opab 5206 df-mpt 5226 df-tr 5260 df-id 5578 df-eprel 5584 df-po 5592 df-so 5593 df-fr 5637 df-we 5639 df-xp 5691 df-rel 5692 df-cnv 5693 df-co 5694 df-dm 5695 df-rn 5696 df-res 5697 df-ima 5698 df-pred 6321 df-ord 6387 df-on 6388 df-lim 6389 df-suc 6390 df-iota 6514 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-ov 7434 df-oprab 7435 df-mpo 7436 df-om 7888 df-2nd 8015 df-frecs 8306 df-wrecs 8337 df-recs 8411 df-rdg 8450 df-map 8868 df-nn 12267 df-hlim 30991 df-sh 31226 df-ch 31240 df-span 31328 |
| This theorem is referenced by: spancl 31355 spanss2 31364 spanid 31366 spanss 31367 shsval3i 31407 elspani 31562 |
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