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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 | . . 3 ⊢ ((A ∈ S ⋀ B ∈ S ⋀ C ∈ S) → (ARB ↔ (CFA)R(CFB))) | |
| 2 | 1 | 3expia 834 | . 2 ⊢ ((A ∈ S ⋀ B ∈ S) → (C ∈ S → (ARB ↔ (CFA)R(CFB)))) |
| 3 | ndmopr.1 | . . . . 5 ⊢ B ∈ V | |
| 4 | ndmord.4 | . . . . 5 ⊢ R ⊆ (S × S) | |
| 5 | 3, 4 | brel 3218 | . . . 4 ⊢ (ARB → (A ∈ S ⋀ B ∈ S)) |
| 6 | oprex 3974 | . . . . . 6 ⊢ (CFB) ∈ V | |
| 7 | 6, 4 | brel 3218 | . . . . 5 ⊢ ((CFA)R(CFB) → ((CFA) ∈ S ⋀ (CFB) ∈ S)) |
| 8 | ndmord.3 | . . . . . . . 8 ⊢ A ∈ V | |
| 9 | ndmopr.2 | . . . . . . . 8 ⊢ dom F = (S × S) | |
| 10 | ndmord.5 | . . . . . . . 8 ⊢ ¬ ∅ ∈ S | |
| 11 | 8, 9, 10 | ndmoprrcl 4038 | . . . . . . 7 ⊢ ((CFA) ∈ S → (C ∈ S ⋀ A ∈ S)) |
| 12 | 11 | pm3.27d 325 | . . . . . 6 ⊢ ((CFA) ∈ S → A ∈ S) |
| 13 | 3, 9, 10 | ndmoprrcl 4038 | . . . . . . 7 ⊢ ((CFB) ∈ S → (C ∈ S ⋀ B ∈ S)) |
| 14 | 13 | pm3.27d 325 | . . . . . 6 ⊢ ((CFB) ∈ S → B ∈ S) |
| 15 | 12, 14 | anim12i 333 | . . . . 5 ⊢ (((CFA) ∈ S ⋀ (CFB) ∈ S) → (A ∈ S ⋀ B ∈ S)) |
| 16 | 7, 15 | syl 10 | . . . 4 ⊢ ((CFA)R(CFB) → (A ∈ S ⋀ B ∈ S)) |
| 17 | 5, 16 | pm5.21ni 677 | . . 3 ⊢ (¬ (A ∈ S ⋀ B ∈ S) → (ARB ↔ (CFA)R(CFB))) |
| 18 | 17 | a1d 12 | . 2 ⊢ (¬ (A ∈ S ⋀ B ∈ S) → (C ∈ S → (ARB ↔ (CFA)R(CFB)))) |
| 19 | 2, 18 | pm2.61i 126 | 1 ⊢ (C ∈ S → (ARB ↔ (CFA)R(CFB))) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 2 → wi 3 ↔ wb 146 ⋀ wa 223 ⋀ w3a 774 = wceq 954 ∈ wcel 956 Vcvv 1807 ⊆ wss 2043 ∅c0 2276 class class class wbr 2614 × cxp 3163 dom cdm 3165 (class class class)co 3954 |
| This theorem is referenced by: ltapi 5010 ltmpi 5011 ltapq 5056 ltmpq 5057 ltapr 5131 ltasr 5189 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-sep 2698 ax-pow 2737 ax-pr 2774 ax-un 2861 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3an 776 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-ral 1646 df-rex 1647 df-v 1808 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-nul 2277 df-pw 2398 df-sn 2408 df-pr 2409 df-op 2412 df-uni 2499 df-br 2615 df-opab 2662 df-xp 3179 df-cnv 3181 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fv 3193 df-opr 3956 |