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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 1137 | . . . . . 6 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝐵 ⊆ 𝐴) | |
| 3 | sseqin2 4164 | . . . . . 6 ⊢ (𝐵 ⊆ 𝐴 ↔ (𝐴 ∩ 𝐵) = 𝐵) | |
| 4 | 2, 3 | sylib 218 | . . . . 5 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = 𝐵) |
| 5 | ressbas.r | . . . . . . 7 ⊢ 𝑅 = (𝑊 ↾s 𝐴) | |
| 6 | 5, 1 | ressid2 17198 | . . . . . 6 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝑅 = 𝑊) |
| 7 | 6 | fveq2d 6839 | . . . . 5 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (Base‘𝑅) = (Base‘𝑊)) |
| 8 | 1, 4, 7 | 3eqtr4a 2798 | . . . 4 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 9 | 8 | 3expib 1123 | . . 3 ⊢ (𝐵 ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅))) |
| 10 | simp2 1138 | . . . . . 6 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝑊 ∈ V) | |
| 11 | 1 | fvexi 6849 | . . . . . . 7 ⊢ 𝐵 ∈ V |
| 12 | 11 | inex2 5256 | . . . . . 6 ⊢ (𝐴 ∩ 𝐵) ∈ V |
| 13 | baseid 17176 | . . . . . . 7 ⊢ Base = Slot (Base‘ndx) | |
| 14 | 13 | setsid 17171 | . . . . . 6 ⊢ ((𝑊 ∈ V ∧ (𝐴 ∩ 𝐵) ∈ V) → (𝐴 ∩ 𝐵) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉))) |
| 15 | 10, 12, 14 | sylancl 587 | . . . . 5 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉))) |
| 16 | 5, 1 | ressval2 17199 | . . . . . 6 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → 𝑅 = (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉)) |
| 17 | 16 | fveq2d 6839 | . . . . 5 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (Base‘𝑅) = (Base‘(𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉))) |
| 18 | 15, 17 | eqtr4d 2775 | . . . 4 ⊢ ((¬ 𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 19 | 18 | 3expib 1123 | . . 3 ⊢ (¬ 𝐵 ⊆ 𝐴 → ((𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅))) |
| 20 | 9, 19 | pm2.61i 182 | . 2 ⊢ ((𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 21 | in0 4336 | . . . . 5 ⊢ (𝐴 ∩ ∅) = ∅ | |
| 22 | fvprc 6827 | . . . . . . 7 ⊢ (¬ 𝑊 ∈ V → (Base‘𝑊) = ∅) | |
| 23 | 1, 22 | eqtrid 2784 | . . . . . 6 ⊢ (¬ 𝑊 ∈ V → 𝐵 = ∅) |
| 24 | 23 | ineq2d 4161 | . . . . 5 ⊢ (¬ 𝑊 ∈ V → (𝐴 ∩ 𝐵) = (𝐴 ∩ ∅)) |
| 25 | 21, 24, 22 | 3eqtr4a 2798 | . . . 4 ⊢ (¬ 𝑊 ∈ V → (𝐴 ∩ 𝐵) = (Base‘𝑊)) |
| 26 | base0 17178 | . . . . . 6 ⊢ ∅ = (Base‘∅) | |
| 27 | 26 | eqcomi 2746 | . . . . 5 ⊢ (Base‘∅) = ∅ |
| 28 | reldmress 17196 | . . . . 5 ⊢ Rel dom ↾s | |
| 29 | 27, 5, 28 | oveqprc 17156 | . . . 4 ⊢ (¬ 𝑊 ∈ V → (Base‘𝑊) = (Base‘𝑅)) |
| 30 | 25, 29 | eqtrd 2772 | . . 3 ⊢ (¬ 𝑊 ∈ V → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 31 | 30 | adantr 480 | . 2 ⊢ ((¬ 𝑊 ∈ V ∧ 𝐴 ∈ 𝑉) → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| 32 | 20, 31 | pm2.61ian 812 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝐴 ∩ 𝐵) = (Base‘𝑅)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 Vcvv 3430 ∩ cin 3889 ⊆ wss 3890 ∅c0 4274 〈cop 4574 ‘cfv 6493 (class class class)co 7361 sSet csts 17127 ndxcnx 17157 Basecbs 17173 ↾s cress 17194 |
| 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-sep 5232 ax-nul 5242 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-1cn 11090 ax-addcl 11092 |
| 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-ral 3053 df-rex 3063 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-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-ov 7364 df-oprab 7365 df-mpo 7366 df-om 7812 df-2nd 7937 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-nn 12169 df-sets 17128 df-slot 17146 df-ndx 17158 df-base 17174 df-ress 17195 |
| This theorem is referenced by: ressbasssg 17201 ressbas2 17202 ressbasssOLD 17204 ressress 17211 xrge0base 17565 rescabs 17794 resscatc 18070 resspos 18389 resstos 18390 idresefmnd 18861 smndex1bas 18871 resscntz 19302 idrespermg 19380 submomnd 20101 opprsubg 20326 subrngpropd 20539 subrgpropd 20579 suborng 20847 sralmod 21177 lidlssbas 21206 lidlbas 21207 resstopn 23164 resstps 23165 ressuss 24240 ressxms 24503 ressms 24504 cphsubrglem 25157 cphsscph 25231 xrge00 33092 gsumge0cl 46820 sge0tsms 46829 uzlidlring 48726 dmatALTbas 48892 |
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