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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 5667 | . . 3 ⊢ (𝐴 ↾ 𝐵) = (𝐴 ∩ (𝐵 × V)) | |
| 2 | inss2 4183 | . . 3 ⊢ (𝐴 ∩ (𝐵 × V)) ⊆ (𝐵 × V) | |
| 3 | 1, 2 | eqsstri 3977 | . 2 ⊢ (𝐴 ↾ 𝐵) ⊆ (𝐵 × V) |
| 4 | relxp 5673 | . 2 ⊢ Rel (𝐵 × V) | |
| 5 | relss 5762 | . 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 |
| This proof depends on syntax axioms: Vcvv 3450 ∩ cin 3898 ⊆ wss 3899 × cxp 5653 ↾ cres 5657 Rel wrel 5660 |
| 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-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-rab 3413 df-v 3452 df-in 3906 df-ss 3916 df-opab 5168 df-xp 5661 df-rel 5662 df-res 5667 |
| This theorem is used by: resindm 6023 relresdm1 6029 iss 6031 dfres2 6037 restidsing 6049 asymref 6110 poirr2 6118 cnvcnvres 6201 resco 6246 coeq0 6252 resssxp 6267 ressn 6283 dfpo2 6294 snres0 6296 funssres 6578 fnresdisj 6653 fnres 6660 fresaunres2 6748 fcnvres 6753 nfunsn 6918 dffv2 6974 fsnunfv 7186 eqfunresadj 7364 resfunexgALT 7946 elecres 8746 domss2 9135 fidomdm 9302 ttrclco 9698 cottrcl 9699 dmttrcl 9701 rnttrcl 9702 frmin 9732 frrlem16 9741 frr1 9742 dmct 10527 dmctOLD 10528 relexp0rel 15111 setsres 17271 pospo 18432 metustid 24781 ovoliunlem1 25731 dvres 26139 dvres2 26140 dvlog 26889 efopnlem2 26895 noetasuplem2 27971 noetainflem2 27975 h2hlm 31462 hlimcaui 31718 dfrdg2 36373 funpartfun 36523 bj-idreseq 37915 bj-idreseqb 37916 brres2 39022 br1cnvssrres 39334 refrelressn 39353 trrelressn 39416 dfeldisj2 39559 dfeldisj3 39560 dfeldisj4 39561 disjres 39593 antisymrelres 39615 antisymrelressn 39616 mapfzcons1 43563 diophrw 43605 eldioph2lem1 43606 eldioph2lem2 43607 undmrnresiss 44445 brfvrcld2 44533 relexpiidm 44545 limsupresuz 46532 liminfresuz 46613 funressnfv 47932 dfdfat2 48017 resinsn 49799 resinsnALT 49800 tposres0 49804 setrec2lem2 50621 |
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