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Mirrors > Home > ILE Home > Th. List > relsnop | GIF version |
Description: A singleton of an ordered pair is a relation. (Contributed by NM, 17-May-1998.) (Revised by Mario Carneiro, 26-Apr-2015.) |
Ref | Expression |
---|---|
relsn.1 | ⊢ 𝐴 ∈ V |
relsnop.2 | ⊢ 𝐵 ∈ V |
Ref | Expression |
---|---|
relsnop | ⊢ Rel {〈𝐴, 𝐵〉} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relsn.1 | . . 3 ⊢ 𝐴 ∈ V | |
2 | relsnop.2 | . . 3 ⊢ 𝐵 ∈ V | |
3 | 1, 2 | opelvv 4390 | . 2 ⊢ 〈𝐴, 𝐵〉 ∈ (V × V) |
4 | opexgOLD 3965 | . . . 4 ⊢ ((𝐴 ∈ V ∧ 𝐵 ∈ V) → 〈𝐴, 𝐵〉 ∈ V) | |
5 | 1, 2, 4 | mp2an 402 | . . 3 ⊢ 〈𝐴, 𝐵〉 ∈ V |
6 | 5 | relsn 4443 | . 2 ⊢ (Rel {〈𝐴, 𝐵〉} ↔ 〈𝐴, 𝐵〉 ∈ (V × V)) |
7 | 3, 6 | mpbir 134 | 1 ⊢ Rel {〈𝐴, 𝐵〉} |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1393 Vcvv 2557 {csn 3375 〈cop 3378 × cxp 4343 Rel wrel 4350 |
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-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-ral 2311 df-rex 2312 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-opab 3819 df-xp 4351 df-rel 4352 |
This theorem is referenced by: cnvsn 4803 fsn 5335 |
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