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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 5663 | . . 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 5669 | . 2 ⊢ Rel (𝐵 × V) | |
| 5 | relss 5758 | . 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 3451 ∩ cin 3898 ⊆ wss 3899 × cxp 5649 ↾ cres 5653 Rel wrel 5656 |
| 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 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-rab 3414 df-v 3453 df-in 3906 df-ss 3916 df-opab 5168 df-xp 5657 df-rel 5658 df-res 5663 |
| This theorem is used by: resindm 6019 relresdm1 6025 iss 6027 dfres2 6033 restidsing 6045 asymref 6110 poirr2 6118 cnvcnvres 6206 resco 6251 coeq0 6257 resssxp 6272 ressn 6288 dfpo2 6299 snres0 6301 funssres 6584 fnresdisj 6659 fnres 6666 fresaunres2 6754 fcnvres 6759 nfunsn 6924 dffv2 6980 fsnunfv 7192 eqfunresadj 7370 resfunexgALT 7960 elecres 8766 domss2 9155 fidomdm 9323 ttrclco 9719 cottrcl 9720 dmttrcl 9722 rnttrcl 9723 frmin 9753 frrlem16 9762 frr1 9763 setrec2lem2 9976 dmct 10602 dmctOLD 10603 relexp0rel 15190 setsres 17356 pospo 18517 metustid 24873 ovoliunlem1 25823 dvres 26231 dvres2 26232 dvlog 26979 efopnlem2 26985 noetasuplem2 28091 noetainflem2 28095 h2hlm 31582 hlimcaui 31838 dfrdg2 36557 funpartfun 36707 bj-idreseq 38083 bj-idreseqb 38084 brres2 39205 br1cnvssrres 39517 refrelressn 39536 trrelressn 39599 dfeldisj2 39742 dfeldisj3 39743 dfeldisj4 39744 disjres 39776 antisymrelres 39798 antisymrelressn 39799 mapfzcons1 43727 diophrw 43769 eldioph2lem1 43770 eldioph2lem2 43771 undmrnresiss 44603 brfvrcld2 44691 relexpiidm 44703 limsupresuz 46712 liminfresuz 46793 funressnfv 48112 dfdfat2 48197 resinsn 49979 resinsnALT 49980 tposres0 49984 |
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