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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 5630 | . . 3 ⊢ (𝐴 ↾ 𝐵) = (𝐴 ∩ (𝐵 × V)) | |
| 2 | inss2 4166 | . . 3 ⊢ (𝐴 ∩ (𝐵 × V)) ⊆ (𝐵 × V) | |
| 3 | 1, 2 | eqsstri 3961 | . 2 ⊢ (𝐴 ↾ 𝐵) ⊆ (𝐵 × V) |
| 4 | relxp 5636 | . 2 ⊢ Rel (𝐵 × V) | |
| 5 | relss 5725 | . 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 3431 ∩ cin 3882 ⊆ wss 3883 × cxp 5616 ↾ cres 5620 Rel wrel 5623 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-tru 1550 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-rab 3392 df-v 3433 df-in 3890 df-ss 3900 df-opab 5135 df-xp 5624 df-rel 5625 df-res 5630 |
| This theorem is referenced by: relresdm1 5985 iss 5987 dfres2 5993 restidsing 6005 asymref 6066 poirr2 6074 cnvcnvres 6156 resco 6201 coeq0 6207 resssxp 6221 ressn 6236 dfpo2 6247 snres0 6249 funssres 6529 fnresdisj 6605 fnres 6612 fresaunres2 6699 fcnvres 6704 nfunsn 6866 dffv2 6922 fsnunfv 7131 eqfunresadj 7304 resfunexgALT 7890 elecres 8682 domss2 9064 fidomdm 9234 ttrclco 9630 cottrcl 9631 dmttrcl 9633 rnttrcl 9634 frmin 9664 frrlem16 9673 frr1 9674 dmct 10437 relexp0rel 14990 setsres 17139 pospo 18300 metustid 24537 ovoliunlem1 25487 dvres 25896 dvres2 25897 dvlog 26633 efopnlem2 26639 noetasuplem2 27716 noetainflem2 27720 h2hlm 31069 hlimcaui 31325 dfrdg2 36021 funpartfun 36171 bj-idreseq 37522 bj-idreseqb 37523 brres2 38640 br1cnvssrres 38952 refrelressn 38971 trrelressn 39034 dfeldisj2 39177 dfeldisj3 39178 dfeldisj4 39179 disjres 39211 antisymrelres 39233 antisymrelressn 39234 mapfzcons1 43166 diophrw 43208 eldioph2lem1 43209 eldioph2lem2 43210 undmrnresiss 44048 brfvrcld2 44136 relexpiidm 44148 limsupresuz 46146 liminfresuz 46227 funressnfv 47506 dfdfat2 47591 resinsn 49362 resinsnALT 49363 tposres0 49367 setrec2lem2 50184 |
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