3.60/1.22 YES 3.60/1.22 3.60/1.22 Problem: 3.60/1.22 strict: 3.60/1.22 a(a(x1)) -> a(b(a(x1))) 3.60/1.22 weak: 3.60/1.22 b(x1) -> b(b(x1)) 3.60/1.22 3.60/1.22 Proof: 3.60/1.22 Arctic Interpretation Processor: 3.60/1.22 dimension: 2 3.60/1.22 interpretation: 3.60/1.22 [0 -&] 3.60/1.22 [b](x0) = [-& -&]x0, 3.60/1.22 3.60/1.22 [0 0] 3.60/1.22 [a](x0) = [1 4]x0 3.60/1.22 orientation: 3.60/1.22 [1 4] [0 0] 3.60/1.22 a(a(x1)) = [5 8]x1 >= [1 1]x1 = a(b(a(x1))) 3.60/1.22 3.60/1.22 [0 -&] [0 -&] 3.60/1.22 b(x1) = [-& -&]x1 >= [-& -&]x1 = b(b(x1)) 3.60/1.22 problem: 3.60/1.22 strict: 3.60/1.22 3.60/1.22 weak: 3.60/1.22 b(x1) -> b(b(x1)) 3.60/1.22 Qed 3.60/1.24 EOF