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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 3262 |
. 2
| |
| 2 | df-cnv 3182 |
. . 3
| |
| 3 | 2 | releqi 3240 |
. 2
|
| 4 | 1, 3 | mpbir 190 |
1
|
| Colors of variables: wff set class |
| Syntax hints: class class
class wbr 2615 |
| This theorem is referenced by: intasym 3434 asymref 3435 cnvopab 3441 cnv0 3442 cnvi 3443 cnvsn 3445 cnvun 3451 cnvin 3452 cnvxp 3460 dfrel2 3481 cnvcnv 3482 resdm2 3492 coi2 3507 unidmrn 3512 cnvexg 3515 funi 3541 funcnv2 3552 fcnvres 3643 f11 3659 f1cnv 3661 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1209 ax-11o 1217 ax-ext 1458 ax-sep 2699 ax-pow 2738 ax-pr 2775 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 980 df-sb 1171 df-eu 1381 df-mo 1382 df-clab 1463 df-cleq 1468 df-clel 1471 df-ne 1585 df-v 1809 df-dif 2046 df-un 2047 df-in 2048 df-ss 2050 df-nul 2278 df-pw 2399 df-sn 2409 df-pr 2410 df-op 2413 df-opab 2663 df-xp 3180 df-rel 3181 df-cnv 3182 |