| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > opelres | GIF version | ||
| Description: Ordered pair membership in a restriction. Exercise 13 of [TakeutiZaring] p. 25. (Contributed by NM, 13-Nov-1995.) |
| Ref | Expression |
|---|---|
| opelres.1 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| opelres | ⊢ (〈𝐴, 𝐵〉 ∈ (𝐶 ↾ 𝐷) ↔ (〈𝐴, 𝐵〉 ∈ 𝐶 ∧ 𝐴 ∈ 𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-res 4788 | . . 3 ⊢ (𝐶 ↾ 𝐷) = (𝐶 ∩ (𝐷 × V)) | |
| 2 | 1 | eleq2i 2305 | . 2 ⊢ (〈𝐴, 𝐵〉 ∈ (𝐶 ↾ 𝐷) ↔ 〈𝐴, 𝐵〉 ∈ (𝐶 ∩ (𝐷 × V))) |
| 3 | elin 3412 | . 2 ⊢ (〈𝐴, 𝐵〉 ∈ (𝐶 ∩ (𝐷 × V)) ↔ (〈𝐴, 𝐵〉 ∈ 𝐶 ∧ 〈𝐴, 𝐵〉 ∈ (𝐷 × V))) | |
| 4 | opelres.1 | . . . 4 ⊢ 𝐵 ∈ V | |
| 5 | opelxp 4806 | . . . 4 ⊢ (〈𝐴, 𝐵〉 ∈ (𝐷 × V) ↔ (𝐴 ∈ 𝐷 ∧ 𝐵 ∈ V)) | |
| 6 | 4, 5 | mpbiran2 954 | . . 3 ⊢ (〈𝐴, 𝐵〉 ∈ (𝐷 × V) ↔ 𝐴 ∈ 𝐷) |
| 7 | 6 | anbi2i 461 | . 2 ⊢ ((〈𝐴, 𝐵〉 ∈ 𝐶 ∧ 〈𝐴, 𝐵〉 ∈ (𝐷 × V)) ↔ (〈𝐴, 𝐵〉 ∈ 𝐶 ∧ 𝐴 ∈ 𝐷)) |
| 8 | 2, 3, 7 | 3bitri 206 | 1 ⊢ (〈𝐴, 𝐵〉 ∈ (𝐶 ↾ 𝐷) ↔ (〈𝐴, 𝐵〉 ∈ 𝐶 ∧ 𝐴 ∈ 𝐷)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∧ wa 104 ↔ wb 105 ∈ wcel 2209 Vcvv 2821 ∩ cin 3219 〈cop 3712 × cxp 4774 ↾ cres 4778 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4251 ax-pow 4313 ax-pr 4348 |
| This proof depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ral 2533 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-opab 4194 df-xp 4782 df-res 4788 |
| This theorem is used by: brres 5071 opelresg 5072 opres 5074 dmres 5086 elres 5101 relssres 5103 resiexg 5111 iss 5112 restidsing 5122 asymref 5176 ssrnres 5233 cnvresima 5280 ressn 5331 funssres 5423 fcnvres 5578 relresfin 7268 |
| Copyright terms: Public domain | W3C validator |