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| Description: A converse is a relation. Theorem 12 of [Suppes] p. 62. |
| Ref | Expression |
|---|---|
| relcnv |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relopab 2494 |
. 2
| |
| 2 | df-cnv 2426 |
. . 3
| |
| 3 | releq 2477 |
. . 3
| |
| 4 | 2, 3 | ax-mp 6 |
. 2
|
| 5 | 1, 4 | mpbir 165 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: intasym 2627 cnvopab 2632 cnv0 2633 cnvi 2634 cnvsn 2636 cnvun 2642 cnvin 2643 cnvxp 2651 dfrel2 2660 cnvcnv 2661 coi2 2666 cnvexg 2669 funi 2692 funcnv2 2702 fcnvres 2768 f11 2780 f1cnv 2782 |
| 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-opab 2098 df-xp 2424 df-rel 2425 df-cnv 2426 |