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| Mirrors > Home > MPE Home > Th. List > cssmre | Structured version Visualization version GIF version | ||
| Description: The closed subspaces of a pre-Hilbert space are a Moore system. Unlike many of our other examples of closure systems, this one is not usually an algebraic closure system df-acs 17551: consider the Hilbert space of sequences ℕ⟶ℝ with convergent sum; the subspace of all sequences with finite support is the classic example of a non-closed subspace, but for every finite set of sequences of finite support, there is a finite-dimensional (and hence closed) subspace containing all of the sequences, so if closed subspaces were an algebraic closure system this would violate acsfiel 17620. (Contributed by Mario Carneiro, 13-Oct-2015.) |
| Ref | Expression |
|---|---|
| cssmre.v | ⊢ 𝑉 = (Base‘𝑊) |
| cssmre.c | ⊢ 𝐶 = (ClSubSp‘𝑊) |
| Ref | Expression |
|---|---|
| cssmre | ⊢ (𝑊 ∈ PreHil → 𝐶 ∈ (Moore‘𝑉)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cssmre.v | . . . . . 6 ⊢ 𝑉 = (Base‘𝑊) | |
| 2 | cssmre.c | . . . . . 6 ⊢ 𝐶 = (ClSubSp‘𝑊) | |
| 3 | 1, 2 | cssss 21665 | . . . . 5 ⊢ (𝑥 ∈ 𝐶 → 𝑥 ⊆ 𝑉) |
| 4 | velpw 4547 | . . . . 5 ⊢ (𝑥 ∈ 𝒫 𝑉 ↔ 𝑥 ⊆ 𝑉) | |
| 5 | 3, 4 | sylibr 234 | . . . 4 ⊢ (𝑥 ∈ 𝐶 → 𝑥 ∈ 𝒫 𝑉) |
| 6 | 5 | a1i 11 | . . 3 ⊢ (𝑊 ∈ PreHil → (𝑥 ∈ 𝐶 → 𝑥 ∈ 𝒫 𝑉)) |
| 7 | 6 | ssrdv 3928 | . 2 ⊢ (𝑊 ∈ PreHil → 𝐶 ⊆ 𝒫 𝑉) |
| 8 | 1, 2 | css1 21670 | . 2 ⊢ (𝑊 ∈ PreHil → 𝑉 ∈ 𝐶) |
| 9 | intss1 4906 | . . . . . . . . . . . 12 ⊢ (𝑧 ∈ 𝑥 → ∩ 𝑥 ⊆ 𝑧) | |
| 10 | eqid 2737 | . . . . . . . . . . . . 13 ⊢ (ocv‘𝑊) = (ocv‘𝑊) | |
| 11 | 10 | ocv2ss 21653 | . . . . . . . . . . . 12 ⊢ (∩ 𝑥 ⊆ 𝑧 → ((ocv‘𝑊)‘𝑧) ⊆ ((ocv‘𝑊)‘∩ 𝑥)) |
| 12 | 10 | ocv2ss 21653 | . . . . . . . . . . . 12 ⊢ (((ocv‘𝑊)‘𝑧) ⊆ ((ocv‘𝑊)‘∩ 𝑥) → ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 13 | 9, 11, 12 | 3syl 18 | . . . . . . . . . . 11 ⊢ (𝑧 ∈ 𝑥 → ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 14 | 13 | ad2antll 730 | . . . . . . . . . 10 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 15 | simprl 771 | . . . . . . . . . 10 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) | |
| 16 | 14, 15 | sseldd 3923 | . . . . . . . . 9 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 17 | simpl2 1194 | . . . . . . . . . . 11 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑥 ⊆ 𝐶) | |
| 18 | simprr 773 | . . . . . . . . . . 11 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑧 ∈ 𝑥) | |
| 19 | 17, 18 | sseldd 3923 | . . . . . . . . . 10 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑧 ∈ 𝐶) |
| 20 | 10, 2 | cssi 21664 | . . . . . . . . . 10 ⊢ (𝑧 ∈ 𝐶 → 𝑧 = ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 21 | 19, 20 | syl 17 | . . . . . . . . 9 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑧 = ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 22 | 16, 21 | eleqtrrd 2840 | . . . . . . . 8 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑦 ∈ 𝑧) |
| 23 | 22 | expr 456 | . . . . . . 7 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) → (𝑧 ∈ 𝑥 → 𝑦 ∈ 𝑧)) |
| 24 | 23 | alrimiv 1929 | . . . . . 6 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) → ∀𝑧(𝑧 ∈ 𝑥 → 𝑦 ∈ 𝑧)) |
| 25 | vex 3434 | . . . . . . 7 ⊢ 𝑦 ∈ V | |
| 26 | 25 | elint 4896 | . . . . . 6 ⊢ (𝑦 ∈ ∩ 𝑥 ↔ ∀𝑧(𝑧 ∈ 𝑥 → 𝑦 ∈ 𝑧)) |
| 27 | 24, 26 | sylibr 234 | . . . . 5 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) → 𝑦 ∈ ∩ 𝑥) |
| 28 | 27 | ex 412 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) → 𝑦 ∈ ∩ 𝑥)) |
| 29 | 28 | ssrdv 3928 | . . 3 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ∩ 𝑥) |
| 30 | simp1 1137 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝑊 ∈ PreHil) | |
| 31 | intssuni 4913 | . . . . . 6 ⊢ (𝑥 ≠ ∅ → ∩ 𝑥 ⊆ ∪ 𝑥) | |
| 32 | 31 | 3ad2ant3 1136 | . . . . 5 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∩ 𝑥 ⊆ ∪ 𝑥) |
| 33 | simp2 1138 | . . . . . . 7 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝑥 ⊆ 𝐶) | |
| 34 | 7 | 3ad2ant1 1134 | . . . . . . 7 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝐶 ⊆ 𝒫 𝑉) |
| 35 | 33, 34 | sstrd 3933 | . . . . . 6 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝑥 ⊆ 𝒫 𝑉) |
| 36 | sspwuni 5043 | . . . . . 6 ⊢ (𝑥 ⊆ 𝒫 𝑉 ↔ ∪ 𝑥 ⊆ 𝑉) | |
| 37 | 35, 36 | sylib 218 | . . . . 5 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∪ 𝑥 ⊆ 𝑉) |
| 38 | 32, 37 | sstrd 3933 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∩ 𝑥 ⊆ 𝑉) |
| 39 | 1, 2, 10 | iscss2 21666 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ ∩ 𝑥 ⊆ 𝑉) → (∩ 𝑥 ∈ 𝐶 ↔ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ∩ 𝑥)) |
| 40 | 30, 38, 39 | syl2anc 585 | . . 3 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → (∩ 𝑥 ∈ 𝐶 ↔ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ∩ 𝑥)) |
| 41 | 29, 40 | mpbird 257 | . 2 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∩ 𝑥 ∈ 𝐶) |
| 42 | 7, 8, 41 | ismred 17564 | 1 ⊢ (𝑊 ∈ PreHil → 𝐶 ∈ (Moore‘𝑉)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1087 ∀wal 1540 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 ⊆ wss 3890 ∅c0 4274 𝒫 cpw 4542 ∪ cuni 4851 ∩ cint 4890 ‘cfv 6499 Basecbs 17179 Moorecmre 17544 PreHilcphl 21604 ocvcocv 21640 ClSubSpccss 21641 |
| 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-rep 5213 ax-sep 5232 ax-nul 5242 ax-pow 5308 ax-pr 5376 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| 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-rmo 3343 df-reu 3344 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-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6266 df-ord 6327 df-on 6328 df-lim 6329 df-suc 6330 df-iota 6455 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-tpos 8176 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-er 8643 df-map 8775 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-nn 12175 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 df-sets 17134 df-slot 17152 df-ndx 17164 df-base 17180 df-plusg 17233 df-mulr 17234 df-sca 17236 df-vsca 17237 df-ip 17238 df-0g 17404 df-mre 17548 df-mgm 18608 df-sgrp 18687 df-mnd 18703 df-mhm 18751 df-grp 18912 df-ghm 19188 df-mgp 20122 df-ur 20163 df-ring 20216 df-oppr 20317 df-rhm 20452 df-staf 20816 df-srng 20817 df-lmod 20857 df-lmhm 21017 df-lvec 21098 df-sra 21168 df-rgmod 21169 df-phl 21606 df-ocv 21643 df-css 21644 |
| This theorem is referenced by: mrccss 21674 |
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