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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 5637 | . . 3 ⊢ (𝐴 ↾ 𝐵) = (𝐴 ∩ (𝐵 × V)) | |
| 2 | inss2 4179 | . . 3 ⊢ (𝐴 ∩ (𝐵 × V)) ⊆ (𝐵 × V) | |
| 3 | 1, 2 | eqsstri 3969 | . 2 ⊢ (𝐴 ↾ 𝐵) ⊆ (𝐵 × V) |
| 4 | relxp 5643 | . 2 ⊢ Rel (𝐵 × V) | |
| 5 | relss 5732 | . 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 3430 ∩ cin 3889 ⊆ wss 3890 × cxp 5623 ↾ cres 5627 Rel wrel 5630 |
| 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 3391 df-v 3432 df-in 3897 df-ss 3907 df-opab 5149 df-xp 5631 df-rel 5632 df-res 5637 |
| This theorem is referenced by: relresdm1 5993 iss 5995 dfres2 6001 restidsing 6013 asymref 6074 poirr2 6082 cnvcnvres 6164 resco 6209 coeq0 6215 resssxp 6229 ressn 6244 dfpo2 6255 snres0 6257 funssres 6537 fnresdisj 6613 fnres 6620 fresaunres2 6707 fcnvres 6712 nfunsn 6874 dffv2 6930 fsnunfv 7136 eqfunresadj 7309 resfunexgALT 7895 elecres 8686 domss2 9068 fidomdm 9238 ttrclco 9633 cottrcl 9634 dmttrcl 9636 rnttrcl 9637 frmin 9667 frrlem16 9676 frr1 9677 dmct 10440 relexp0rel 14993 setsres 17142 pospo 18303 metustid 24532 ovoliunlem1 25482 dvres 25891 dvres2 25892 dvlog 26631 efopnlem2 26637 noetasuplem2 27715 noetainflem2 27719 h2hlm 31069 hlimcaui 31325 dfrdg2 35994 funpartfun 36144 bj-idreseq 37495 bj-idreseqb 37496 brres2 38611 br1cnvssrres 38923 refrelressn 38942 trrelressn 39005 dfeldisj2 39148 dfeldisj3 39149 dfeldisj4 39150 disjres 39182 antisymrelres 39204 antisymrelressn 39205 mapfzcons1 43166 diophrw 43208 eldioph2lem1 43209 eldioph2lem2 43210 undmrnresiss 44052 brfvrcld2 44140 relexpiidm 44152 limsupresuz 46152 liminfresuz 46233 funressnfv 47506 dfdfat2 47591 resinsn 49362 resinsnALT 49363 tposres0 49367 setrec2lem2 50184 |
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