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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 5643 | . . 3 ⊢ (𝐴 ↾ 𝐵) = (𝐴 ∩ (𝐵 × V)) | |
| 2 | inss2 4178 | . . 3 ⊢ (𝐴 ∩ (𝐵 × V)) ⊆ (𝐵 × V) | |
| 3 | 1, 2 | eqsstri 3968 | . 2 ⊢ (𝐴 ↾ 𝐵) ⊆ (𝐵 × V) |
| 4 | relxp 5649 | . 2 ⊢ Rel (𝐵 × V) | |
| 5 | relss 5738 | . 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 3429 ∩ cin 3888 ⊆ wss 3889 × cxp 5629 ↾ cres 5633 Rel wrel 5636 |
| 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 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-rab 3390 df-v 3431 df-in 3896 df-ss 3906 df-opab 5148 df-xp 5637 df-rel 5638 df-res 5643 |
| This theorem is referenced by: relresdm1 5998 iss 6000 dfres2 6006 restidsing 6018 asymref 6079 poirr2 6087 cnvcnvres 6169 resco 6214 coeq0 6220 resssxp 6234 ressn 6249 dfpo2 6260 snres0 6262 funssres 6542 fnresdisj 6618 fnres 6625 fresaunres2 6712 fcnvres 6717 nfunsn 6879 dffv2 6935 fsnunfv 7142 eqfunresadj 7315 resfunexgALT 7901 elecres 8692 domss2 9074 fidomdm 9244 ttrclco 9639 cottrcl 9640 dmttrcl 9642 rnttrcl 9643 frmin 9673 frrlem16 9682 frr1 9683 dmct 10446 relexp0rel 14999 setsres 17148 pospo 18309 metustid 24519 ovoliunlem1 25469 dvres 25878 dvres2 25879 dvlog 26615 efopnlem2 26621 noetasuplem2 27698 noetainflem2 27702 h2hlm 31051 hlimcaui 31307 dfrdg2 35975 funpartfun 36125 bj-idreseq 37476 bj-idreseqb 37477 brres2 38594 br1cnvssrres 38906 refrelressn 38925 trrelressn 38988 dfeldisj2 39131 dfeldisj3 39132 dfeldisj4 39133 disjres 39165 antisymrelres 39187 antisymrelressn 39188 mapfzcons1 43149 diophrw 43191 eldioph2lem1 43192 eldioph2lem2 43193 undmrnresiss 44031 brfvrcld2 44119 relexpiidm 44131 limsupresuz 46131 liminfresuz 46212 funressnfv 47491 dfdfat2 47576 resinsn 49347 resinsnALT 49348 tposres0 49352 setrec2lem2 50169 |
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