| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: Alternate definition of strict dominance. Definition 3 of [Suppes] p. 97. |
| Ref | Expression |
|---|---|
| brsdom2.1 | ⊢ A ∈ V |
| brsdom2.2 | ⊢ B ∈ V |
| Ref | Expression |
|---|---|
| brsdom2 | ⊢ (A ≺ B ↔ (A ≼ B ∧ ¬ B ≼ A)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dfsdom2 3362 | . . 3 ⊢ ≺ = ( ≼ ∖ ◡ ≼ ) | |
| 2 | 1 | eleq2i 1153 | . 2 ⊢ (〈A, B〉 ∈ ≺ ↔ 〈A, B〉 ∈ ( ≼ ∖ ◡ ≼ )) |
| 3 | df-br 2063 | . 2 ⊢ (A ≺ B ↔ 〈A, B〉 ∈ ≺ ) | |
| 4 | df-br 2063 | . . . 4 ⊢ (A ≼ B ↔ 〈A, B〉 ∈ ≼ ) | |
| 5 | df-br 2063 | . . . . . 6 ⊢ (B ≼ A ↔ 〈B, A〉 ∈ ≼ ) | |
| 6 | brsdom2.1 | . . . . . . 7 ⊢ A ∈ V | |
| 7 | brsdom2.2 | . . . . . . 7 ⊢ B ∈ V | |
| 8 | 6, 7 | opelcnv 2518 | . . . . . 6 ⊢ (〈A, B〉 ∈ ◡ ≼ ↔ 〈B, A〉 ∈ ≼ ) |
| 9 | 5, 8 | bitr4 154 | . . . . 5 ⊢ (B ≼ A ↔ 〈A, B〉 ∈ ◡ ≼ ) |
| 10 | 9 | negbii 162 | . . . 4 ⊢ (¬ B ≼ A ↔ ¬ 〈A, B〉 ∈ ◡ ≼ ) |
| 11 | 4, 10 | anbi12i 369 | . . 3 ⊢ ((A ≼ B ∧ ¬ B ≼ A) ↔ (〈A, B〉 ∈ ≼ ∧ ¬ 〈A, B〉 ∈ ◡ ≼ )) |
| 12 | eldif 1496 | . . 3 ⊢ (〈A, B〉 ∈ ( ≼ ∖ ◡ ≼ ) ↔ (〈A, B〉 ∈ ≼ ∧ ¬ 〈A, B〉 ∈ ◡ ≼ )) | |
| 13 | 11, 12 | bitr4 154 | . 2 ⊢ ((A ≼ B ∧ ¬ B ≼ A) ↔ 〈A, B〉 ∈ ( ≼ ∖ ◡ ≼ )) |
| 14 | 2, 3, 13 | 3bitr4 158 | 1 ⊢ (A ≺ B ↔ (A ≼ B ∧ ¬ B ≼ A)) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 1 ↔ wb 127 ∧ wa 196 ∈ wcel 1092 Vcvv 1348 ∖ cdif 1484 〈cop 1810 class class class wbr 2054 ◡ccnv 2409 ≼ cdom 3272 ≺ csdm 3273 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-un 1076 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3an 583 df-ex 679 df-sb 853 df-eu 1009 df-mo 1010 df-clab 1093 df-cleq 1097 df-clel 1099 df-ral 1205 df-rex 1206 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-uni 1920 df-br 2063 df-opab 2098 df-id 2125 df-xp 2424 df-rel 2425 df-cnv 2426 df-co 2427 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fun 2432 df-fn 2433 df-f 2434 df-f1 2435 df-fo 2436 df-f1o 2437 df-er 3200 df-en 3274 df-dom 3275 df-sdom 3276 |