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Mirrors > Home > ILE Home > Th. List > opelcnv | GIF version |
Description: Ordered-pair membership in converse. (Contributed by NM, 13-Aug-1995.) |
Ref | Expression |
---|---|
opelcnv.1 | ⊢ 𝐴 ∈ V |
opelcnv.2 | ⊢ 𝐵 ∈ V |
Ref | Expression |
---|---|
opelcnv | ⊢ (〈𝐴, 𝐵〉 ∈ ◡𝑅 ↔ 〈𝐵, 𝐴〉 ∈ 𝑅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opelcnv.1 | . 2 ⊢ 𝐴 ∈ V | |
2 | opelcnv.2 | . 2 ⊢ 𝐵 ∈ V | |
3 | opelcnvg 4791 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (〈𝐴, 𝐵〉 ∈ ◡𝑅 ↔ 〈𝐵, 𝐴〉 ∈ 𝑅)) | |
4 | 1, 2, 3 | mp2an 424 | 1 ⊢ (〈𝐴, 𝐵〉 ∈ ◡𝑅 ↔ 〈𝐵, 𝐴〉 ∈ 𝑅) |
Colors of variables: wff set class |
Syntax hints: ↔ wb 104 ∈ wcel 2141 Vcvv 2730 〈cop 3586 ◡ccnv 4610 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-14 2144 ax-ext 2152 ax-sep 4107 ax-pow 4160 ax-pr 4194 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-v 2732 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-br 3990 df-opab 4051 df-cnv 4619 |
This theorem is referenced by: cnvopab 5012 cnv0 5014 cnvdif 5017 dfrel2 5061 cnvcnvsn 5087 cnvresima 5100 dfco2 5110 cnviinm 5152 fcnvres 5381 dmtpos 6235 dftpos4 6242 tpostpos 6243 fisumcom2 11401 fprodcom2fi 11589 |
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