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Mirrors > Home > ILE Home > Th. List > brdif | GIF version |
Description: The difference of two binary relations. (Contributed by Scott Fenton, 11-Apr-2011.) |
Ref | Expression |
---|---|
brdif | ⊢ (𝐴(𝑅 ∖ 𝑆)𝐵 ↔ (𝐴𝑅𝐵 ∧ ¬ 𝐴𝑆𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldif 3153 | . 2 ⊢ (〈𝐴, 𝐵〉 ∈ (𝑅 ∖ 𝑆) ↔ (〈𝐴, 𝐵〉 ∈ 𝑅 ∧ ¬ 〈𝐴, 𝐵〉 ∈ 𝑆)) | |
2 | df-br 4019 | . 2 ⊢ (𝐴(𝑅 ∖ 𝑆)𝐵 ↔ 〈𝐴, 𝐵〉 ∈ (𝑅 ∖ 𝑆)) | |
3 | df-br 4019 | . . 3 ⊢ (𝐴𝑅𝐵 ↔ 〈𝐴, 𝐵〉 ∈ 𝑅) | |
4 | df-br 4019 | . . . 4 ⊢ (𝐴𝑆𝐵 ↔ 〈𝐴, 𝐵〉 ∈ 𝑆) | |
5 | 4 | notbii 669 | . . 3 ⊢ (¬ 𝐴𝑆𝐵 ↔ ¬ 〈𝐴, 𝐵〉 ∈ 𝑆) |
6 | 3, 5 | anbi12i 460 | . 2 ⊢ ((𝐴𝑅𝐵 ∧ ¬ 𝐴𝑆𝐵) ↔ (〈𝐴, 𝐵〉 ∈ 𝑅 ∧ ¬ 〈𝐴, 𝐵〉 ∈ 𝑆)) |
7 | 1, 2, 6 | 3bitr4i 212 | 1 ⊢ (𝐴(𝑅 ∖ 𝑆)𝐵 ↔ (𝐴𝑅𝐵 ∧ ¬ 𝐴𝑆𝐵)) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 ∧ wa 104 ↔ wb 105 ∈ wcel 2160 ∖ cdif 3141 〈cop 3610 class class class wbr 4018 |
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-in1 615 ax-in2 616 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-ext 2171 |
This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2176 df-cleq 2182 df-clel 2185 df-nfc 2321 df-v 2754 df-dif 3146 df-br 4019 |
This theorem is referenced by: fndmdif 5638 brdifun 6581 |
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