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| Mirrors > Home > MPE Home > Th. List > relres | Structured version Visualization version GIF version | ||
| Description: A restriction is a relation. Exercise 12 of [TakeutiZaring] p. 25. (Contributed by NM, 2-Aug-1994.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
| Ref | Expression |
|---|---|
| relres | ⊢ Rel (𝐴 ↾ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-res 5644 | . . 3 ⊢ (𝐴 ↾ 𝐵) = (𝐴 ∩ (𝐵 × V)) | |
| 2 | inss2 4192 | . . 3 ⊢ (𝐴 ∩ (𝐵 × V)) ⊆ (𝐵 × V) | |
| 3 | 1, 2 | eqsstri 3982 | . 2 ⊢ (𝐴 ↾ 𝐵) ⊆ (𝐵 × V) |
| 4 | relxp 5650 | . 2 ⊢ Rel (𝐵 × V) | |
| 5 | relss 5739 | . 2 ⊢ ((𝐴 ↾ 𝐵) ⊆ (𝐵 × V) → (Rel (𝐵 × V) → Rel (𝐴 ↾ 𝐵))) | |
| 6 | 3, 4, 5 | mp2 9 | 1 ⊢ Rel (𝐴 ↾ 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: Vcvv 3442 ∩ cin 3902 ⊆ wss 3903 × cxp 5630 ↾ cres 5634 Rel wrel 5637 |
| 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-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-rab 3402 df-v 3444 df-in 3910 df-ss 3920 df-opab 5163 df-xp 5638 df-rel 5639 df-res 5644 |
| This theorem is referenced by: relresdm1 6000 iss 6002 dfres2 6008 restidsing 6020 asymref 6081 poirr2 6089 cnvcnvres 6171 resco 6216 coeq0 6222 resssxp 6236 ressn 6251 dfpo2 6262 snres0 6264 funssres 6544 fnresdisj 6620 fnres 6627 fresaunres2 6714 fcnvres 6719 nfunsn 6881 dffv2 6937 fsnunfv 7143 eqfunresadj 7316 resfunexgALT 7902 elecres 8694 domss2 9076 fidomdm 9246 ttrclco 9639 cottrcl 9640 dmttrcl 9642 rnttrcl 9643 frmin 9673 frrlem16 9682 frr1 9683 dmct 10446 relexp0rel 14972 setsres 17117 pospo 18278 metustid 24510 ovoliunlem1 25471 dvres 25880 dvres2 25881 dvlog 26628 efopnlem2 26634 noetasuplem2 27714 noetainflem2 27718 h2hlm 31068 hlimcaui 31324 dfrdg2 36009 funpartfun 36159 bj-idreseq 37417 bj-idreseqb 37418 brres2 38524 br1cnvssrres 38836 refrelressn 38855 trrelressn 38918 dfeldisj2 39061 dfeldisj3 39062 dfeldisj4 39063 disjres 39095 antisymrelres 39117 antisymrelressn 39118 mapfzcons1 43074 diophrw 43116 eldioph2lem1 43117 eldioph2lem2 43118 undmrnresiss 43960 brfvrcld2 44048 relexpiidm 44060 limsupresuz 46061 liminfresuz 46142 funressnfv 47403 dfdfat2 47488 resinsn 49231 resinsnALT 49232 tposres0 49236 setrec2lem2 50053 |
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