| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: The converse of a binary relation swaps arguments. Theorem 11 of [Suppes] p. 61. |
| Ref | Expression |
|---|---|
| brcnv.1 | ⊢ A ∈ V |
| brcnv.2 | ⊢ B ∈ V |
| Ref | Expression |
|---|---|
| brcnv | ⊢ (A◡RB ↔ BRA) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | brcnv.1 | . . 3 ⊢ A ∈ V | |
| 2 | brcnv.2 | . . 3 ⊢ B ∈ V | |
| 3 | 1, 2 | opelcnv 2518 | . 2 ⊢ (〈A, B〉 ∈ ◡R ↔ 〈B, A〉 ∈ R) |
| 4 | df-br 2063 | . 2 ⊢ (A◡RB ↔ 〈A, B〉 ∈ ◡R) | |
| 5 | df-br 2063 | . 2 ⊢ (BRA ↔ 〈B, A〉 ∈ R) | |
| 6 | 3, 4, 5 | 3bitr4 158 | 1 ⊢ (A◡RB ↔ BRA) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 127 ∈ wcel 1092 Vcvv 1348 〈cop 1810 class class class wbr 2054 ◡ccnv 2409 |
| This theorem is referenced by: cnvco 2520 dfrn2 2523 dfdm4 2525 brelrn 2559 eliniseg 2618 intasym 2627 cnvi 2634 dminss 2648 imainss 2649 dffun2 2674 funcnv2 2702 fun2cnv 2704 imadif 2714 f11 2780 ecid 3236 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-br 2063 df-opab 2098 df-cnv 2426 |