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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 17589: 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 17658. (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 21706 | . . . . 5 ⊢ (𝑥 ∈ 𝐶 → 𝑥 ⊆ 𝑉) |
| 4 | velpw 4550 | . . . . 5 ⊢ (𝑥 ∈ 𝒫 𝑉 ↔ 𝑥 ⊆ 𝑉) | |
| 5 | 3, 4 | sylibr 236 | . . . 4 ⊢ (𝑥 ∈ 𝐶 → 𝑥 ∈ 𝒫 𝑉) |
| 6 | 5 | a1i 11 | . . 3 ⊢ (𝑊 ∈ PreHil → (𝑥 ∈ 𝐶 → 𝑥 ∈ 𝒫 𝑉)) |
| 7 | 6 | ssrdv 3933 | . 2 ⊢ (𝑊 ∈ PreHil → 𝐶 ⊆ 𝒫 𝑉) |
| 8 | 1, 2 | css1 21711 | . 2 ⊢ (𝑊 ∈ PreHil → 𝑉 ∈ 𝐶) |
| 9 | intss1 4911 | . . . . . . . . . . . 12 ⊢ (𝑧 ∈ 𝑥 → ∩ 𝑥 ⊆ 𝑧) | |
| 10 | eqid 2752 | . . . . . . . . . . . . 13 ⊢ (ocv‘𝑊) = (ocv‘𝑊) | |
| 11 | 10 | ocv2ss 21694 | . . . . . . . . . . . 12 ⊢ (∩ 𝑥 ⊆ 𝑧 → ((ocv‘𝑊)‘𝑧) ⊆ ((ocv‘𝑊)‘∩ 𝑥)) |
| 12 | 10 | ocv2ss 21694 | . . . . . . . . . . . 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 737 | . . . . . . . . . 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 778 | . . . . . . . . . 10 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) | |
| 16 | 14, 15 | sseldd 3928 | . . . . . . . . 9 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 17 | simpl2 1202 | . . . . . . . . . . 11 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑥 ⊆ 𝐶) | |
| 18 | simprr 780 | . . . . . . . . . . 11 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑧 ∈ 𝑥) | |
| 19 | 17, 18 | sseldd 3928 | . . . . . . . . . 10 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑧 ∈ 𝐶) |
| 20 | 10, 2 | cssi 21705 | . . . . . . . . . 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 2855 | . . . . . . . 8 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑦 ∈ 𝑧) |
| 23 | 22 | expr 459 | . . . . . . 7 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) → (𝑧 ∈ 𝑥 → 𝑦 ∈ 𝑧)) |
| 24 | 23 | alrimiv 1937 | . . . . . 6 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) → ∀𝑧(𝑧 ∈ 𝑥 → 𝑦 ∈ 𝑧)) |
| 25 | vex 3448 | . . . . . . 7 ⊢ 𝑦 ∈ V | |
| 26 | 25 | elint 4901 | . . . . . 6 ⊢ (𝑦 ∈ ∩ 𝑥 ↔ ∀𝑧(𝑧 ∈ 𝑥 → 𝑦 ∈ 𝑧)) |
| 27 | 24, 26 | sylibr 236 | . . . . 5 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) → 𝑦 ∈ ∩ 𝑥) |
| 28 | 27 | ex 415 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) → 𝑦 ∈ ∩ 𝑥)) |
| 29 | 28 | ssrdv 3933 | . . 3 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ∩ 𝑥) |
| 30 | simp1 1145 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝑊 ∈ PreHil) | |
| 31 | intssuni 4918 | . . . . . 6 ⊢ (𝑥 ≠ ∅ → ∩ 𝑥 ⊆ ∪ 𝑥) | |
| 32 | 31 | 3ad2ant3 1144 | . . . . 5 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∩ 𝑥 ⊆ ∪ 𝑥) |
| 33 | simp2 1146 | . . . . . . 7 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝑥 ⊆ 𝐶) | |
| 34 | 7 | 3ad2ant1 1142 | . . . . . . 7 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝐶 ⊆ 𝒫 𝑉) |
| 35 | 33, 34 | sstrd 3937 | . . . . . 6 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝑥 ⊆ 𝒫 𝑉) |
| 36 | sspwuni 5047 | . . . . . 6 ⊢ (𝑥 ⊆ 𝒫 𝑉 ↔ ∪ 𝑥 ⊆ 𝑉) | |
| 37 | 35, 36 | sylib 220 | . . . . 5 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∪ 𝑥 ⊆ 𝑉) |
| 38 | 32, 37 | sstrd 3937 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∩ 𝑥 ⊆ 𝑉) |
| 39 | 1, 2, 10 | iscss2 21707 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ ∩ 𝑥 ⊆ 𝑉) → (∩ 𝑥 ∈ 𝐶 ↔ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ∩ 𝑥)) |
| 40 | 30, 38, 39 | syl2anc 592 | . . 3 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → (∩ 𝑥 ∈ 𝐶 ↔ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ∩ 𝑥)) |
| 41 | 29, 40 | mpbird 259 | . 2 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∩ 𝑥 ∈ 𝐶) |
| 42 | 7, 8, 41 | ismred 17602 | 1 ⊢ (𝑊 ∈ PreHil → 𝐶 ∈ (Moore‘𝑉)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∧ w3a 1095 ∀wal 1548 = wceq 1550 ∈ wcel 2132 ≠ wne 2947 ⊆ wss 3895 ∅c0 4276 𝒫 cpw 4545 ∪ cuni 4855 ∩ cint 4895 ‘cfv 6506 Basecbs 17217 Moorecmre 17582 PreHilcphl 21645 ocvcocv 21681 ClSubSpccss 21682 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-5 1920 ax-6 1977 ax-7 2018 ax-8 2134 ax-9 2142 ax-10 2165 ax-11 2181 ax-12 2202 ax-ext 2724 ax-rep 5217 ax-sep 5236 ax-nul 5246 ax-pow 5312 ax-pr 5380 ax-un 7703 ax-cnex 11115 ax-resscn 11116 ax-1cn 11117 ax-icn 11118 ax-addcl 11119 ax-addrcl 11120 ax-mulcl 11121 ax-mulrcl 11122 ax-mulcom 11123 ax-addass 11124 ax-mulass 11125 ax-distr 11126 ax-i2m1 11127 ax-1ne0 11128 ax-1rid 11129 ax-rnegex 11130 ax-rrecex 11131 ax-cnre 11132 ax-pre-lttri 11133 ax-pre-lttrn 11134 ax-pre-ltadd 11135 ax-pre-mulgt0 11136 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3or 1096 df-3an 1097 df-tru 1553 df-fal 1563 df-ex 1790 df-nf 1794 df-sb 2081 df-mo 2556 df-eu 2586 df-clab 2731 df-cleq 2744 df-clel 2827 df-nfc 2901 df-ne 2948 df-nel 3052 df-ral 3067 df-rex 3077 df-rmo 3357 df-reu 3358 df-rab 3405 df-v 3446 df-sbc 3736 df-csb 3844 df-dif 3898 df-un 3900 df-in 3902 df-ss 3912 df-pss 3915 df-nul 4277 df-if 4471 df-pw 4547 df-sn 4573 df-pr 4575 df-op 4579 df-uni 4856 df-int 4896 df-iun 4941 df-br 5091 df-opab 5153 df-mpt 5172 df-tr 5198 df-id 5531 df-eprel 5536 df-po 5544 df-so 5545 df-fr 5589 df-we 5591 df-xp 5642 df-rel 5643 df-cnv 5644 df-co 5645 df-dm 5646 df-rn 5647 df-res 5648 df-ima 5649 df-pred 6273 df-ord 6334 df-on 6335 df-lim 6336 df-suc 6337 df-iota 6462 df-fun 6508 df-fn 6509 df-f 6510 df-f1 6511 df-fo 6512 df-f1o 6513 df-fv 6514 df-riota 7338 df-ov 7384 df-oprab 7385 df-mpo 7386 df-om 7832 df-1st 7955 df-2nd 7956 df-tpos 8190 df-frecs 8246 df-wrecs 8277 df-recs 8326 df-rdg 8365 df-er 8662 df-map 8794 df-en 8913 df-dom 8914 df-sdom 8915 df-pnf 11204 df-mnf 11205 df-xr 11206 df-ltxr 11207 df-le 11208 df-sub 11402 df-neg 11403 df-nn 12197 df-2 12266 df-3 12267 df-4 12268 df-5 12269 df-6 12270 df-7 12271 df-8 12272 df-sets 17172 df-slot 17190 df-ndx 17202 df-base 17218 df-plusg 17271 df-mulr 17272 df-sca 17274 df-vsca 17275 df-ip 17276 df-0g 17442 df-mre 17586 df-mgm 18646 df-sgrp 18725 df-mnd 18741 df-mhm 18789 df-grp 18950 df-ghm 19226 df-mgp 20159 df-ur 20200 df-ring 20253 df-oppr 20354 df-rhm 20489 df-staf 20857 df-srng 20858 df-lmod 20898 df-lmhm 21058 df-lvec 21139 df-sra 21209 df-rgmod 21210 df-phl 21647 df-ocv 21684 df-css 21685 |
| This theorem is referenced by: mrccss 21715 |
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