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| Mirrors > Home > MPE Home > Th. List > Mathboxes > br1cnvxrn2 | Structured version Visualization version GIF version | ||
| Description: The converse of a binary relation over a range Cartesian product. (Contributed by Peter Mazsa, 11-Jul-2021.) |
| Ref | Expression |
|---|---|
| br1cnvxrn2 | ⊢ (𝐵 ∈ 𝑉 → (𝐴◡(𝑅 ⋉ 𝑆)𝐵 ↔ ∃𝑦∃𝑧(𝐴 = 〈𝑦, 𝑧〉 ∧ 𝐵𝑅𝑦 ∧ 𝐵𝑆𝑧))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrnrel 38362 | . . 3 ⊢ Rel (𝑅 ⋉ 𝑆) | |
| 2 | 1 | relbrcnv 6081 | . 2 ⊢ (𝐴◡(𝑅 ⋉ 𝑆)𝐵 ↔ 𝐵(𝑅 ⋉ 𝑆)𝐴) |
| 3 | brxrn2 38364 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐵(𝑅 ⋉ 𝑆)𝐴 ↔ ∃𝑦∃𝑧(𝐴 = 〈𝑦, 𝑧〉 ∧ 𝐵𝑅𝑦 ∧ 𝐵𝑆𝑧))) | |
| 4 | 2, 3 | bitrid 283 | 1 ⊢ (𝐵 ∈ 𝑉 → (𝐴◡(𝑅 ⋉ 𝑆)𝐵 ↔ ∃𝑦∃𝑧(𝐴 = 〈𝑦, 𝑧〉 ∧ 𝐵𝑅𝑦 ∧ 𝐵𝑆𝑧))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ w3a 1086 = wceq 1540 ∃wex 1779 ∈ wcel 2109 〈cop 4598 class class class wbr 5110 ◡ccnv 5640 ⋉ cxrn 38175 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-sep 5254 ax-nul 5264 ax-pr 5390 ax-un 7714 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-nul 4300 df-if 4492 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-br 5111 df-opab 5173 df-mpt 5192 df-id 5536 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-iota 6467 df-fun 6516 df-fn 6517 df-f 6518 df-fo 6520 df-fv 6522 df-1st 7971 df-2nd 7972 df-xrn 38360 |
| This theorem is referenced by: elec1cnvxrn2 38390 |
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