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| Mirrors > Home > MPE Home > Th. List > opelcnv | Structured version Visualization version GIF version | ||
| Description: Ordered-pair membership in converse relation. (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 5866 | . 2 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (〈𝐴, 𝐵〉 ∈ ◡𝑅 ↔ 〈𝐵, 𝐴〉 ∈ 𝑅)) | |
| 4 | 1, 2, 3 | mp2an 704 | 1 ⊢ (〈𝐴, 𝐵〉 ∈ ◡𝑅 ↔ 〈𝐵, 𝐴〉 ∈ 𝑅) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 209 ∈ wcel 2141 Vcvv 3453 〈cop 4594 ◡ccnv 5660 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2143 ax-9 2151 ax-ext 2733 ax-sep 5256 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-sb 2095 df-clab 2740 df-cleq 2753 df-clel 2836 df-rab 3415 df-v 3455 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-sn 4589 df-pr 4591 df-op 4595 df-br 5109 df-opab 5173 df-cnv 5669 |
| This theorem is referenced by: cnvopab 6137 cnvdif 6140 dfrel2 6187 cnvcnvsn 6220 cnvresima 6231 dfco2 6246 cnviin 6287 fcnvres 6755 cnvf1olem 8104 cnvimadfsn 8167 dmtpos 8233 dftpos4 8240 tpostpos 8241 brsdom2 9088 fsumcom2 15824 fprodcom2 16037 gsumcom2 20044 metustsym 24691 gsumhashmul 33353 cnvco1 36205 cnvco2 36206 cnviun 44324 tposideq 49611 |
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