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| Mirrors > Home > MPE Home > Th. List > ressbas | Structured version Visualization version GIF version | ||
| Description: Base set of a structure restriction. (Contributed by Stefan O'Rear, 26-Nov-2014.) (Proof shortened by AV, 7-Nov-2024.) |
| Ref | Expression |
|---|---|
| ressbas.r | ⊢ 𝑅 = (𝑊 ↾s 𝐴) |
| ressbas.b | ⊢ 𝐵 = (Base‘𝑊) |
| Ref | Expression |
|---|---|
| ressbas | ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ressbas.b | . . . . 5 ⊢ 𝐵 = (Base‘𝑊) | |
| 2 | simp1 1154 | . . . . . 6 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝐵 ⊆ 𝐴) | |
| 3 | sseqin2 4169 | . . . . . 6 ⊢ (𝐵 ⊆ 𝐴 ↔ (𝐴 ∩ 𝐵) = 𝐵) | |
| 4 | 2, 3 | sylib 221 | . . . . 5 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = 𝐵) |
| 5 | ressbas.r | . . . . . . 7 ⊢ 𝑅 = (𝑊 ↾s 𝐴) | |
| 6 | 5, 1 | ressid2 17329 | . . . . . 6 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝑅 = 𝑊) |
| 7 | 6 | fveq2d 6883 | . . . . 5 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (Base‘𝑅) = (Base‘𝑊)) |
| 8 | 1, 4, 7 | 3eqtr4a 2821 | . . . 4 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 9 | 8 | 3expib 1140 | . . 3 ⊢ (𝐵 ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅))) |
| 10 | simp2 1155 | . . . . . 6 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝑊 ∈ V) | |
| 11 | 1 | fvexi 6893 | . . . . . . 7 ⊢ 𝐵 ∈ V |
| 12 | 11 | inex2 5281 | . . . . . 6 ⊢ (𝐴 ∩ 𝐵) ∈ V |
| 13 | baseid 17307 | . . . . . . 7 ⊢ Base = Slot (Base‘ndx) | |
| 14 | 13 | setsid 17302 | . . . . . 6 ⊢ ((𝑊 ∈ V ∧ (𝐴 ∩ 𝐵) ∈ V) → (𝐴 ∩ 𝐵) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉))) |
| 15 | 10, 12, 14 | sylancl 598 | . . . . 5 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉))) |
| 16 | 5, 1 | ressval2 17330 | . . . . . 6 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝑅 = (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉)) |
| 17 | 16 | fveq2d 6883 | . . . . 5 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (Base‘𝑅) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉))) |
| 18 | 15, 17 | eqtr4d 2798 | . . . 4 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 19 | 18 | 3expib 1140 | . . 3 ⊢ (¬ 𝐵 ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅))) |
| 20 | 9, 19 | pm2.61i 184 | . 2 ⊢ ((𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 21 | in0 4345 | . . . . 5 ⊢ (𝐴 ∩ ∅) = ∅ | |
| 22 | fvprc 6871 | . . . . . . 7 ⊢ (¬ 𝑊 ∈ V → (Base‘𝑊) = ∅) | |
| 23 | 1, 22 | eqtrid 2807 | . . . . . 6 ⊢ (¬ 𝑊 ∈ V → 𝐵 = ∅) |
| 24 | 23 | ineq2d 4166 | . . . . 5 ⊢ (¬ 𝑊 ∈ V → (𝐴 ∩ 𝐵) = (𝐴 ∩ ∅)) |
| 25 | 21, 24, 22 | 3eqtr4a 2821 | . . . 4 ⊢ (¬ 𝑊 ∈ V → (𝐴 ∩ 𝐵) = (Base‘𝑊)) |
| 26 | base0 17309 | . . . . . 6 ⊢ ∅ = (Base‘∅) | |
| 27 | 26 | eqcomi 2769 | . . . . 5 ⊢ (Base‘∅) = ∅ |
| 28 | reldmress 17327 | . . . . 5 ⊢ Rel dom ↾s | |
| 29 | 27, 5, 28 | oveqprc 17287 | . . . 4 ⊢ (¬ 𝑊 ∈ V → (Base‘𝑊) = (Base‘𝑅)) |
| 30 | 25, 29 | eqtrd 2795 | . . 3 ⊢ (¬ 𝑊 ∈ V → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 31 | 30 | adantr 486 | . 2 ⊢ ((¬ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 32 | 20, 31 | pm2.61ian 824 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 Vcvv 3450 ∩ cin 3898 ⊆ wss 3899 ∅c0 4279 〈cop 4590 ‘cfv 6533 (class class class)co 7414 sSet csts 17258 ndxcnx 17288 Basecbs 17304 ↾s cress 17325 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11183 ax-1cn 11185 ax-addcl 11187 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-nn 12261 df-sets 17259 df-slot 17277 df-ndx 17289 df-base 17305 df-ress 17326 |
| This theorem is used by: ressbasssg 17332 ressbas2 17333 ressbasssOLD 17335 ressress 17342 xrge0base 17696 rescabs 17925 resscatc 18201 resspos 18520 resstos 18521 idresefmnd 19011 smndex1bas 19021 resscntz 19463 idrespermg 19541 submomnd 20262 opprsubg 20496 subrngpropd 20733 subrgpropd 20773 suborng 21045 sralmod 21374 lidlssbas 21404 lidlbas 21405 resstopn 23414 resstps 23415 ressuss 24491 ressxms 24754 ressms 24755 cphsubrglem 25408 cphsscph 25482 xrge00 33457 gsumge0cl 47202 sge0tsms 47211 uzlidlring 49153 dmatALTbas 49334 |
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