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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 4941 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴)) | |
| 4 | 1, 2, 3 | mp2an 426 | 1 ⊢ (𝐴◡𝑅𝐵 ↔ 𝐵𝑅𝐴) |
| Colors of variables: wff set class |
| Syntax hints: ↔ wb 105 ∈ wcel 2205 Vcvv 2815 class class class wbr 4114 ◡ccnv 4753 |
| 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 2208 ax-ext 2216 ax-sep 4233 ax-pow 4292 ax-pr 4327 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-v 2817 df-un 3218 df-in 3220 df-ss 3227 df-pw 3676 df-sn 3700 df-pr 3701 df-op 3703 df-br 4115 df-opab 4177 df-cnv 4762 |
| This theorem is referenced by: cnvco 4945 dfrn2 4948 dfdm4 4953 cnvsym 5151 intasym 5152 asymref 5153 qfto 5157 dminss 5182 imainss 5183 dminxp 5212 cnvcnv3 5217 cnvpom 5310 cnvsom 5311 dffun2 5367 funcnvsn 5406 funcnv2 5421 funcnveq 5424 fun2cnv 5425 imadif 5441 f1ompt 5833 f1eqcocnv 5970 fliftcnv 5974 isocnv2 5991 ercnv 6801 ecid 6845 cnvinfex 7322 eqinfti 7324 infvalti 7326 infmoti 7332 dfinfre 9247 pw1nct 16903 |
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