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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 5111 | . 2 ⊢ (𝐴𝑅𝐵 → 𝐴(𝐶 × 𝐷)𝐵) |
3 | brxp 5601 | . 2 ⊢ (𝐴(𝐶 × 𝐷)𝐵 ↔ (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) | |
4 | 2, 3 | sylib 220 | 1 ⊢ (𝐴𝑅𝐵 → (𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∈ wcel 2114 ⊆ wss 3936 class class class wbr 5066 × cxp 5553 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pr 5330 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-br 5067 df-opab 5129 df-xp 5561 |
This theorem is referenced by: brab2a 5644 soirri 5986 sotri 5987 sotri2 5989 sotri3 5990 ndmovord 7338 ndmovordi 7339 swoer 8319 brecop2 8391 ecopovsym 8399 ecopovtrn 8400 hartogslem1 9006 nlt1pi 10328 indpi 10329 nqerf 10352 ordpipq 10364 lterpq 10392 ltexnq 10397 ltbtwnnq 10400 ltrnq 10401 prnmadd 10419 genpcd 10428 nqpr 10436 1idpr 10451 ltexprlem4 10461 ltexpri 10465 ltaprlem 10466 prlem936 10469 reclem2pr 10470 reclem3pr 10471 reclem4pr 10472 suplem1pr 10474 suplem2pr 10475 supexpr 10476 recexsrlem 10525 addgt0sr 10526 mulgt0sr 10527 mappsrpr 10530 map2psrpr 10532 supsrlem 10533 supsr 10534 ltresr 10562 dfle2 12541 dflt2 12542 dvdszrcl 15612 letsr 17837 hmphtop 22386 brtxp2 33342 brpprod3a 33347 brxrn2 35642 |
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