| Mathbox for Peter Mazsa |
< Previous
Next >
Nearby theorems |
||
| 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 38819 | . . 3 ⊢ Rel (𝑅 ⋉ 𝑆) | |
| 2 | 1 | relbrcnv 6082 | . 2 ⊢ (𝐴◡(𝑅 ⋉ 𝑆)𝐵 ↔ 𝐵(𝑅 ⋉ 𝑆)𝐴) |
| 3 | brxrn2 38821 | . 2 ⊢ (𝐵 ∈ 𝑉 → (𝐵(𝑅 ⋉ 𝑆)𝐴 ↔ ∃𝑦∃𝑧(𝐴 = 〈𝑦, 𝑧〉 ∧ 𝐵𝑅𝑦 ∧ 𝐵𝑆𝑧))) | |
| 4 | 2, 3 | bitrid 285 | 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 208 ∧ w3a 1095 = wceq 1550 ∃wex 1789 ∈ wcel 2132 〈cop 4578 class class class wbr 5090 ◡ccnv 5635 ⋉ cxrn 38611 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1805 ax-4 1819 ax-5 1920 ax-6 1977 ax-7 2018 ax-8 2134 ax-9 2142 ax-10 2165 ax-11 2181 ax-12 2202 ax-ext 2724 ax-sep 5236 ax-nul 5246 ax-pr 5380 ax-un 7703 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3an 1097 df-tru 1553 df-fal 1563 df-ex 1790 df-nf 1794 df-sb 2081 df-mo 2556 df-eu 2586 df-clab 2731 df-cleq 2744 df-clel 2827 df-nfc 2901 df-ne 2948 df-ral 3067 df-rex 3077 df-rab 3405 df-v 3446 df-dif 3898 df-un 3900 df-in 3902 df-ss 3912 df-nul 4277 df-if 4471 df-sn 4573 df-pr 4575 df-op 4579 df-uni 4856 df-br 5091 df-opab 5153 df-mpt 5172 df-id 5531 df-xp 5642 df-rel 5643 df-cnv 5644 df-co 5645 df-dm 5646 df-rn 5647 df-res 5648 df-iota 6462 df-fun 6508 df-fn 6509 df-f 6510 df-fo 6512 df-fv 6514 df-1st 7955 df-2nd 7956 df-xrn 38817 |
| This theorem is referenced by: elec1cnvxrn2 38857 |
| Copyright terms: Public domain | W3C validator |