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Mirrors > Home > ILE Home > Th. List > eqop2 | GIF version |
Description: Two ways to express equality with an ordered pair. (Contributed by NM, 25-Feb-2014.) |
Ref | Expression |
---|---|
eqop2.1 | ⊢ 𝐵 ∈ V |
eqop2.2 | ⊢ 𝐶 ∈ V |
Ref | Expression |
---|---|
eqop2 | ⊢ (𝐴 = 〈𝐵, 𝐶〉 ↔ (𝐴 ∈ (V × V) ∧ ((1st ‘𝐴) = 𝐵 ∧ (2nd ‘𝐴) = 𝐶))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqop2.1 | . . . 4 ⊢ 𝐵 ∈ V | |
2 | eqop2.2 | . . . 4 ⊢ 𝐶 ∈ V | |
3 | 1, 2 | opelvv 4709 | . . 3 ⊢ 〈𝐵, 𝐶〉 ∈ (V × V) |
4 | eleq1 2256 | . . 3 ⊢ (𝐴 = 〈𝐵, 𝐶〉 → (𝐴 ∈ (V × V) ↔ 〈𝐵, 𝐶〉 ∈ (V × V))) | |
5 | 3, 4 | mpbiri 168 | . 2 ⊢ (𝐴 = 〈𝐵, 𝐶〉 → 𝐴 ∈ (V × V)) |
6 | eqop 6230 | . 2 ⊢ (𝐴 ∈ (V × V) → (𝐴 = 〈𝐵, 𝐶〉 ↔ ((1st ‘𝐴) = 𝐵 ∧ (2nd ‘𝐴) = 𝐶))) | |
7 | 5, 6 | biadan2 456 | 1 ⊢ (𝐴 = 〈𝐵, 𝐶〉 ↔ (𝐴 ∈ (V × V) ∧ ((1st ‘𝐴) = 𝐵 ∧ (2nd ‘𝐴) = 𝐶))) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 104 ↔ wb 105 = wceq 1364 ∈ wcel 2164 Vcvv 2760 〈cop 3621 × cxp 4657 ‘cfv 5254 1st c1st 6191 2nd c2nd 6192 |
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 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-sep 4147 ax-pow 4203 ax-pr 4238 ax-un 4464 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ral 2477 df-rex 2478 df-v 2762 df-sbc 2986 df-un 3157 df-in 3159 df-ss 3166 df-pw 3603 df-sn 3624 df-pr 3625 df-op 3627 df-uni 3836 df-br 4030 df-opab 4091 df-mpt 4092 df-id 4324 df-xp 4665 df-rel 4666 df-cnv 4667 df-co 4668 df-dm 4669 df-rn 4670 df-iota 5215 df-fun 5256 df-fn 5257 df-f 5258 df-fo 5260 df-fv 5262 df-1st 6193 df-2nd 6194 |
This theorem is referenced by: (None) |
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