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| Mirrors > Home > ILE Home > Th. List > brcnvg | GIF version | ||
| Description: The converse of a binary relation swaps arguments. Theorem 11 of [Suppes] p. 61. (Contributed by NM, 10-Oct-2005.) |
| Ref | Expression |
|---|---|
| brcnvg | ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opelcnvg 4916 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (〈𝐴, 𝐵〉 ∈ ◡𝑅 ↔ 〈𝐵, 𝐴〉 ∈ 𝑅)) | |
| 2 | df-br 4094 | . 2 ⊢ (𝐴◡𝑅𝐵 ↔ 〈𝐴, 𝐵〉 ∈ ◡𝑅) | |
| 3 | df-br 4094 | . 2 ⊢ (𝐵𝑅𝐴 ↔ 〈𝐵, 𝐴〉 ∈ 𝑅) | |
| 4 | 1, 2, 3 | 3bitr4g 223 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ 𝐵 ∈ 𝐷) → (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∈ wcel 2202 〈cop 3676 class class class wbr 4093 ◡ccnv 4730 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-br 4094 df-opab 4156 df-cnv 4739 |
| This theorem is referenced by: brcnv 4919 brelrng 4969 eliniseg 5113 relbrcnvg 5122 brcodir 5131 sefvex 5669 foeqcnvco 5941 isocnv2 5963 ersym 6757 brdifun 6772 ecidg 6811 cnvti 7278 eqinfti 7279 inflbti 7283 infglbti 7284 negiso 9194 xrnegiso 11902 znleval 14749 pw1nct 16725 |
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