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| Mirrors > Home > MPE Home > Th. List > brel | Structured version Visualization version GIF version | ||
| Description: Two things in a binary relation belong to the relation's domain. (Contributed by NM, 17-May-1996.) (Revised by Mario Carneiro, 26-Apr-2015.) |
| Ref | Expression |
|---|---|
| brel.1 | ⊢ 𝑅 ⊆ (𝐶 × 𝐷) |
| Ref | Expression |
|---|---|
| brel | ⊢ (𝐴𝑅𝐵 → (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | brel.1 | . . 3 ⊢ 𝑅 ⊆ (𝐶 × 𝐷) | |
| 2 | 1 | ssbri 5143 | . 2 ⊢ (𝐴𝑅𝐵 → 𝐴(𝐶 × 𝐷)𝐵) |
| 3 | brxp 5673 | . 2 ⊢ (𝐴(𝐶 × 𝐷)𝐵 ↔ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) | |
| 4 | 2, 3 | sylib 218 | 1 ⊢ (𝐴𝑅𝐵 → (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2113 ⊆ wss 3901 class class class wbr 5098 × cxp 5622 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-br 5099 df-opab 5161 df-xp 5630 |
| This theorem is referenced by: brab2a 5717 soirri 6083 sotri 6084 sotri2 6086 sotri3 6087 ndmovord 7548 ndmovordi 7549 swoer 8666 brecop2 8748 ecopovsym 8756 ecopovtrn 8757 hartogslem1 9447 nlt1pi 10817 indpi 10818 nqerf 10841 ordpipq 10853 lterpq 10881 ltexnq 10886 ltbtwnnq 10889 ltrnq 10890 prnmadd 10908 genpcd 10917 nqpr 10925 1idpr 10940 ltexprlem4 10950 ltexpri 10954 ltaprlem 10955 prlem936 10958 reclem2pr 10959 reclem3pr 10960 reclem4pr 10961 suplem1pr 10963 suplem2pr 10964 supexpr 10965 recexsrlem 11014 addgt0sr 11015 mulgt0sr 11016 mappsrpr 11019 map2psrpr 11021 supsrlem 11022 supsr 11023 ltresr 11051 dfle2 13061 dflt2 13062 dvdszrcl 16184 letsr 18516 hmphtop 23722 brtxp2 36073 brpprod3a 36078 brxrn2 38565 aks6d1c1p1rcl 42358 iccdisj2 49138 i0oii 49161 io1ii 49162 |
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