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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 5144 | . 2 ⊢ (𝐴𝑅𝐵 → 𝐴(𝐶 × 𝐷)𝐵) |
| 3 | brxp 5674 | . 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 2114 ⊆ wss 3902 class class class wbr 5099 × cxp 5623 |
| 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 ax-sep 5242 ax-nul 5252 ax-pr 5378 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ral 3053 df-rex 3062 df-rab 3401 df-v 3443 df-dif 3905 df-un 3907 df-ss 3919 df-nul 4287 df-if 4481 df-sn 4582 df-pr 4584 df-op 4588 df-br 5100 df-opab 5162 df-xp 5631 |
| This theorem is referenced by: brab2a 5718 soirri 6084 sotri 6085 sotri2 6087 sotri3 6088 ndmovord 7550 ndmovordi 7551 swoer 8669 brecop2 8752 ecopovsym 8760 ecopovtrn 8761 hartogslem1 9451 nlt1pi 10821 indpi 10822 nqerf 10845 ordpipq 10857 lterpq 10885 ltexnq 10890 ltbtwnnq 10893 ltrnq 10894 prnmadd 10912 genpcd 10921 nqpr 10929 1idpr 10944 ltexprlem4 10954 ltexpri 10958 ltaprlem 10959 prlem936 10962 reclem2pr 10963 reclem3pr 10964 reclem4pr 10965 suplem1pr 10967 suplem2pr 10968 supexpr 10969 recexsrlem 11018 addgt0sr 11019 mulgt0sr 11020 mappsrpr 11023 map2psrpr 11025 supsrlem 11026 supsr 11027 ltresr 11055 dfle2 13065 dflt2 13066 dvdszrcl 16188 letsr 18520 hmphtop 23726 brtxp2 36054 brpprod3a 36059 brxrn2 38556 aks6d1c1p1rcl 42399 iccdisj2 49178 i0oii 49201 io1ii 49202 |
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