HomeHome Metamath Proof Explorer < Previous   Next >
Related theorems
GIF version

Theorem ndmord 4042
Description: Elimination of redundant antecedents in an ordering law.
Hypotheses
Ref Expression
ndmopr.1 BV
ndmopr.2 dom F = (S × S)
ndmord.3 AV
ndmord.4 R ⊆ (S × S)
ndmord.5 ¬ ∅ ∈ S
ndmord.6 ((ASBSCS) → (ARB ↔ (CFA)R(CFB)))
Assertion
Ref Expression
ndmord (CS → (ARB ↔ (CFA)R(CFB)))

Proof of Theorem ndmord
StepHypRef Expression
1 ndmord.6 . . 3 ((ASBSCS) → (ARB ↔ (CFA)R(CFB)))
213expia 834 . 2 ((ASBS) → (CS → (ARB ↔ (CFA)R(CFB))))
3 ndmopr.1 . . . . 5 BV
4 ndmord.4 . . . . 5 R ⊆ (S × S)
53, 4brel 3218 . . . 4 (ARB → (ASBS))
6 oprex 3974 . . . . . 6 (CFB) ∈ V
76, 4brel 3218 . . . . 5 ((CFA)R(CFB) → ((CFA) ∈ S ⋀ (CFB) ∈ S))
8 ndmord.3 . . . . . . . 8 AV
9 ndmopr.2 . . . . . . . 8 dom F = (S × S)
10 ndmord.5 . . . . . . . 8 ¬ ∅ ∈ S
118, 9, 10ndmoprrcl 4038 . . . . . . 7 ((CFA) ∈ S → (CSAS))
1211pm3.27d 325 . . . . . 6 ((CFA) ∈ SAS)
133, 9, 10ndmoprrcl 4038 . . . . . . 7 ((CFB) ∈ S → (CSBS))
1413pm3.27d 325 . . . . . 6 ((CFB) ∈ SBS)
1512, 14anim12i 333 . . . . 5 (((CFA) ∈ S ⋀ (CFB) ∈ S) → (ASBS))
167, 15syl 10 . . . 4 ((CFA)R(CFB) → (ASBS))
175, 16pm5.21ni 677 . . 3 (¬ (ASBS) → (ARB ↔ (CFA)R(CFB)))
1817a1d 12 . 2 (¬ (ASBS) → (CS → (ARB ↔ (CFA)R(CFB))))
192, 18pm2.61i 126 1 (CS → (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
Copyright terms: Public domain