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Related theorems GIF version |
| Description: Elimination of redundant antecedents in an ordering law. |
| Ref | Expression |
|---|---|
| ndmopr.1 | ⊢ B ∈ V |
| ndmopr.2 | ⊢ dom F = (S × S) |
| ndmord.3 | ⊢ A ∈ V |
| ndmord.4 | ⊢ R ⊆ (S × S) |
| ndmord.5 | ⊢ ¬ ∅ ∈ S |
| ndmord.6 | ⊢ ((A ∈ S ∧ B ∈ S ∧ C ∈ S) → (ARB ↔ (CFA)R(CFB))) |
| Ref | Expression |
|---|---|
| ndmord | ⊢ (C ∈ S → (ARB ↔ (CFA)R(CFB))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ndmord.6 | . . . 4 ⊢ ((A ∈ S ∧ B ∈ S ∧ C ∈ S) → (ARB ↔ (CFA)R(CFB))) | |
| 2 | 1 | 3exp 611 | . . 3 ⊢ (A ∈ S → (B ∈ S → (C ∈ S → (ARB ↔ (CFA)R(CFB))))) |
| 3 | 2 | imp 277 | . 2 ⊢ ((A ∈ S ∧ B ∈ S) → (C ∈ S → (ARB ↔ (CFA)R(CFB)))) |
| 4 | ndmopr.1 | . . . . 5 ⊢ B ∈ V | |
| 5 | ndmord.4 | . . . . 5 ⊢ R ⊆ (S × S) | |
| 6 | 4, 5 | brel 2459 | . . . 4 ⊢ (ARB → (A ∈ S ∧ B ∈ S)) |
| 7 | oprex 3018 | . . . . . 6 ⊢ (CFB) ∈ V | |
| 8 | 7, 5 | brel 2459 | . . . . 5 ⊢ ((CFA)R(CFB) → ((CFA) ∈ S ∧ (CFB) ∈ S)) |
| 9 | ndmord.3 | . . . . . . . 8 ⊢ A ∈ V | |
| 10 | ndmopr.2 | . . . . . . . 8 ⊢ dom F = (S × S) | |
| 11 | ndmord.5 | . . . . . . . 8 ⊢ ¬ ∅ ∈ S | |
| 12 | 9, 10, 11 | ndmoprrcl 3060 | . . . . . . 7 ⊢ ((CFA) ∈ S → (C ∈ S ∧ A ∈ S)) |
| 13 | 12 | pm3.27d 262 | . . . . . 6 ⊢ ((CFA) ∈ S → A ∈ S) |
| 14 | 4, 10, 11 | ndmoprrcl 3060 | . . . . . . 7 ⊢ ((CFB) ∈ S → (C ∈ S ∧ B ∈ S)) |
| 15 | 14 | pm3.27d 262 | . . . . . 6 ⊢ ((CFB) ∈ S → B ∈ S) |
| 16 | 13, 15 | anim12i 268 | . . . . 5 ⊢ (((CFA) ∈ S ∧ (CFB) ∈ S) → (A ∈ S ∧ B ∈ S)) |
| 17 | 8, 16 | syl 12 | . . . 4 ⊢ ((CFA)R(CFB) → (A ∈ S ∧ B ∈ S)) |
| 18 | 6, 17 | pm5.21ni 503 | . . 3 ⊢ (¬ (A ∈ S ∧ B ∈ S) → (ARB ↔ (CFA)R(CFB))) |
| 19 | 18 | a1d 14 | . 2 ⊢ (¬ (A ∈ S ∧ B ∈ S) → (C ∈ S → (ARB ↔ (CFA)R(CFB)))) |
| 20 | 3, 19 | pm2.61i 110 | 1 ⊢ (C ∈ S → (ARB ↔ (CFA)R(CFB))) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 1 → wi 2 ↔ wb 127 ∧ wa 196 ∧ w3a 581 = wceq 1091 ∈ wcel 1092 Vcvv 1348 ⊆ wss 1487 ∅c0 1707 class class class wbr 2054 × cxp 2408 dom cdm 2410 (class class class)co 3001 |
| This theorem is referenced by: ltapi 3824 ltmpi 3825 ltapq 3870 ltmpq 3871 ltapr 3945 ltasr 4003 |
| 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-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-xp 2424 df-cnv 2426 df-dm 2428 df-rn 2429 df-res 2430 df-ima 2431 df-fv 2438 df-opr 3003 |