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Mirrors > Home > ILE Home > Th. List > brcnv | GIF version |
Description: The converse of a binary relation swaps arguments. Theorem 11 of [Suppes] p. 61. (Contributed by NM, 13-Aug-1995.) |
Ref | Expression |
---|---|
opelcnv.1 | ⊢ 𝐴 ∈ V |
opelcnv.2 | ⊢ 𝐵 ∈ V |
Ref | Expression |
---|---|
brcnv | ⊢ (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opelcnv.1 | . 2 ⊢ 𝐴 ∈ V | |
2 | opelcnv.2 | . 2 ⊢ 𝐵 ∈ V | |
3 | brcnvg 4516 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴)) | |
4 | 1, 2, 3 | mp2an 402 | 1 ⊢ (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴) |
Colors of variables: wff set class |
Syntax hints: ↔ wb 98 ∈ wcel 1393 Vcvv 2557 class class class wbr 3764 ◡ccnv 4344 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-pow 3927 ax-pr 3944 |
This theorem depends on definitions: df-bi 110 df-3an 887 df-tru 1246 df-nf 1350 df-sb 1646 df-eu 1903 df-mo 1904 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-v 2559 df-un 2922 df-in 2924 df-ss 2931 df-pw 3361 df-sn 3381 df-pr 3382 df-op 3384 df-br 3765 df-opab 3819 df-cnv 4353 |
This theorem is referenced by: cnvco 4520 dfrn2 4523 dfdm4 4527 cnvsym 4708 intasym 4709 asymref 4710 qfto 4714 dminss 4738 imainss 4739 dminxp 4765 cnvcnv3 4770 cnvpom 4860 cnvsom 4861 dffun2 4912 funcnvsn 4945 funcnv2 4959 funcnveq 4962 fun2cnv 4963 imadif 4979 f1ompt 5320 f1eqcocnv 5431 fliftcnv 5435 isocnv2 5452 ercnv 6127 ecid 6169 |
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