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| Mirrors > Home > MPE Home > Th. List > ressid2 | Structured version Visualization version GIF version | ||
| Description: General behavior of trivial restriction. (Contributed by Stefan O'Rear, 29-Nov-2014.) |
| Ref | Expression |
|---|---|
| ressbas.r | ⊢ 𝑅 = (𝑊 ↾s 𝐴) |
| ressbas.b | ⊢ 𝐵 = (Base‘𝑊) |
| Ref | Expression |
|---|---|
| ressid2 | ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ 𝑋 ∧ 𝐴 ∈ 𝑌) → 𝑅 = 𝑊) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ressbas.r | . . . 4 ⊢ 𝑅 = (𝑊 ↾s 𝐴) | |
| 2 | ressbas.b | . . . 4 ⊢ 𝐵 = (Base‘𝑊) | |
| 3 | 1, 2 | ressval 17198 | . . 3 ⊢ ((𝑊 ∈ 𝑋 ∧ 𝐴 ∈ 𝑌) → 𝑅 = if(𝐵 ⊆ 𝐴, 𝑊, (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉))) |
| 4 | iftrue 4462 | . . 3 ⊢ (𝐵 ⊆ 𝐴 → if(𝐵 ⊆ 𝐴, 𝑊, (𝑊 sSet 〈(Base‘ndx), (𝐴 ∩ 𝐵)〉)) = 𝑊) | |
| 5 | 3, 4 | sylan9eqr 2798 | . 2 ⊢ ((𝐵 ⊆ 𝐴 ∧ (𝑊 ∈ 𝑋 ∧ 𝐴 ∈ 𝑌)) → 𝑅 = 𝑊) |
| 6 | 5 | 3impb 1121 | 1 ⊢ ((𝐵 ⊆ 𝐴 ∧ 𝑊 ∈ 𝑋 ∧ 𝐴 ∈ 𝑌) → 𝑅 = 𝑊) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 397 ∧ w3a 1093 = wceq 1548 ∈ wcel 2121 ∩ cin 3883 ⊆ wss 3884 ifcif 4456 〈cop 4563 ‘cfv 6488 (class class class)co 7359 sSet csts 17128 ndxcnx 17158 Basecbs 17174 ↾s cress 17195 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-sep 5220 ax-nul 5230 ax-pr 5364 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-ral 3056 df-rex 3066 df-rab 3394 df-v 3435 df-sbc 3725 df-dif 3887 df-un 3889 df-in 3891 df-ss 3901 df-nul 4264 df-if 4457 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-br 5075 df-opab 5137 df-id 5515 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-iota 6444 df-fun 6490 df-fv 6496 df-ov 7362 df-oprab 7363 df-mpo 7364 df-ress 17196 |
| This theorem is referenced by: ressbas 17201 resseqnbas 17207 ress0 17208 ressid 17209 ressinbas 17210 ressress 17212 rescabs 17795 0symgefmndeq 19363 snsymgefmndeq 19364 mgpress 20125 psgnghm2 21559 evl1maprhm 22368 resvsca 33417 extdg1id 33860 |
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