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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 17647: 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 17716. (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 21846 | . . . . 5 ⊢ (𝑥 ∈ 𝐶 → 𝑥 ⊆ 𝑉) |
| 4 | velpw 4566 | . . . . 5 ⊢ (𝑥 ∈ 𝒫 𝑉 ↔ 𝑥 ⊆ 𝑉) | |
| 5 | 3, 4 | sylibr 237 | . . . 4 ⊢ (𝑥 ∈ 𝐶 → 𝑥 ∈ 𝒫 𝑉) |
| 6 | 5 | a1i 11 | . . 3 ⊢ (𝑊 ∈ PreHil → (𝑥 ∈ 𝐶 → 𝑥 ∈ 𝒫 𝑉)) |
| 7 | 6 | ssrdv 3942 | . 2 ⊢ (𝑊 ∈ PreHil → 𝐶 ⊆ 𝒫 𝑉) |
| 8 | 1, 2 | css1 21851 | . 2 ⊢ (𝑊 ∈ PreHil → 𝑉 ∈ 𝐶) |
| 9 | intss1 4927 | . . . . . . . . . . . 12 ⊢ (𝑧 ∈ 𝑥 → ∩ 𝑥 ⊆ 𝑧) | |
| 10 | eqid 2762 | . . . . . . . . . . . . 13 ⊢ (ocv‘𝑊) = (ocv‘𝑊) | |
| 11 | 10 | ocv2ss 21834 | . . . . . . . . . . . 12 ⊢ (∩ 𝑥 ⊆ 𝑧 → ((ocv‘𝑊)‘𝑧) ⊆ ((ocv‘𝑊)‘∩ 𝑥)) |
| 12 | 10 | ocv2ss 21834 | . . . . . . . . . . . 12 ⊢ (((ocv‘𝑊)‘𝑧) ⊆ ((ocv‘𝑊)‘∩ 𝑥) → ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 13 | 9, 11, 12 | 3syl 19 | . . . . . . . . . . 11 ⊢ (𝑧 ∈ 𝑥 → ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 14 | 13 | ad2antll 741 | . . . . . . . . . 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 782 | . . . . . . . . . 10 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) | |
| 16 | 14, 15 | sseldd 3937 | . . . . . . . . 9 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 17 | simpl2 1210 | . . . . . . . . . . 11 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑥 ⊆ 𝐶) | |
| 18 | simprr 784 | . . . . . . . . . . 11 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑧 ∈ 𝑥) | |
| 19 | 17, 18 | sseldd 3937 | . . . . . . . . . 10 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑧 ∈ 𝐶) |
| 20 | 10, 2 | cssi 21845 | . . . . . . . . . 10 ⊢ (𝑧 ∈ 𝐶 → 𝑧 = ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 21 | 19, 20 | syl 18 | . . . . . . . . 9 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑧 = ((ocv‘𝑊)‘((ocv‘𝑊)‘𝑧))) |
| 22 | 16, 21 | eleqtrrd 2865 | . . . . . . . 8 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ∧ 𝑧 ∈ 𝑥)) → 𝑦 ∈ 𝑧) |
| 23 | 22 | expr 461 | . . . . . . 7 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) → (𝑧 ∈ 𝑥 → 𝑦 ∈ 𝑧)) |
| 24 | 23 | alrimiv 1956 | . . . . . 6 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) → ∀𝑧(𝑧 ∈ 𝑥 → 𝑦 ∈ 𝑧)) |
| 25 | vex 3458 | . . . . . . 7 ⊢ 𝑦 ∈ V | |
| 26 | 25 | elint 4917 | . . . . . 6 ⊢ (𝑦 ∈ ∩ 𝑥 ↔ ∀𝑧(𝑧 ∈ 𝑥 → 𝑦 ∈ 𝑧)) |
| 27 | 24, 26 | sylibr 237 | . . . . 5 ⊢ (((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) ∧ 𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥))) → 𝑦 ∈ ∩ 𝑥) |
| 28 | 27 | ex 417 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → (𝑦 ∈ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) → 𝑦 ∈ ∩ 𝑥)) |
| 29 | 28 | ssrdv 3942 | . . 3 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ∩ 𝑥) |
| 30 | simp1 1153 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝑊 ∈ PreHil) | |
| 31 | intssuni 4934 | . . . . . 6 ⊢ (𝑥 ≠ ∅ → ∩ 𝑥 ⊆ ∪ 𝑥) | |
| 32 | 31 | 3ad2ant3 1152 | . . . . 5 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∩ 𝑥 ⊆ ∪ 𝑥) |
| 33 | simp2 1154 | . . . . . . 7 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝑥 ⊆ 𝐶) | |
| 34 | 7 | 3ad2ant1 1150 | . . . . . . 7 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝐶 ⊆ 𝒫 𝑉) |
| 35 | 33, 34 | sstrd 3946 | . . . . . 6 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → 𝑥 ⊆ 𝒫 𝑉) |
| 36 | sspwuni 5065 | . . . . . 6 ⊢ (𝑥 ⊆ 𝒫 𝑉 ↔ ∪ 𝑥 ⊆ 𝑉) | |
| 37 | 35, 36 | sylib 221 | . . . . 5 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∪ 𝑥 ⊆ 𝑉) |
| 38 | 32, 37 | sstrd 3946 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∩ 𝑥 ⊆ 𝑉) |
| 39 | 1, 2, 10 | iscss2 21847 | . . . 4 ⊢ ((𝑊 ∈ PreHil ∧ ∩ 𝑥 ⊆ 𝑉) → (∩ 𝑥 ∈ 𝐶 ↔ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ∩ 𝑥)) |
| 40 | 30, 38, 39 | syl2anc 595 | . . 3 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → (∩ 𝑥 ∈ 𝐶 ↔ ((ocv‘𝑊)‘((ocv‘𝑊)‘∩ 𝑥)) ⊆ ∩ 𝑥)) |
| 41 | 29, 40 | mpbird 260 | . 2 ⊢ ((𝑊 ∈ PreHil ∧ 𝑥 ⊆ 𝐶 ∧ 𝑥 ≠ ∅) → ∩ 𝑥 ∈ 𝐶) |
| 42 | 7, 8, 41 | ismred 17660 | 1 ⊢ (𝑊 ∈ PreHil → 𝐶 ∈ (Moore‘𝑉)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 400 ∧ w3a 1102 ∀wal 1567 = wceq 1569 ∈ wcel 2142 ≠ wne 2957 ⊆ wss 3904 ∅c0 4285 𝒫 cpw 4561 ∪ cuni 4871 ∩ cint 4911 ‘cfv 6536 Basecbs 17275 Moorecmre 17640 PreHilcphl 21785 ocvcocv 21821 ClSubSpccss 21822 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-int 4912 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7861 df-1st 7984 df-2nd 7985 df-tpos 8220 df-frecs 8276 df-wrecs 8307 df-recs 8356 df-rdg 8395 df-er 8692 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11449 df-neg 11450 df-nn 12240 df-2 12309 df-3 12310 df-4 12311 df-5 12312 df-6 12313 df-7 12314 df-8 12315 df-sets 17230 df-slot 17248 df-ndx 17260 df-base 17276 df-plusg 17329 df-mulr 17330 df-sca 17332 df-vsca 17333 df-ip 17334 df-0g 17500 df-mre 17644 df-mgm 18704 df-sgrp 18783 df-mnd 18799 df-mhm 18847 df-grp 19009 df-ghm 19290 df-mgp 20223 df-ur 20270 df-ring 20323 df-oppr 20426 df-rhm 20561 df-staf 20953 df-srng 20954 df-lmod 20994 df-lmhm 21154 df-lvec 21235 df-sra 21305 df-rgmod 21306 df-phl 21787 df-ocv 21824 df-css 21825 |
| This theorem is used by: mrccss 21855 |
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