YES Problem: f(f(X)) -> c(n__f(g(n__f(X)))) c(X) -> d(activate(X)) h(X) -> c(n__d(X)) f(X) -> n__f(X) d(X) -> n__d(X) activate(n__f(X)) -> f(X) activate(n__d(X)) -> d(X) activate(X) -> X Proof: Arctic Interpretation Processor: dimension: 2 interpretation: [0 1 ] [n__d](x0) = [-& 0 ]x0, [3 3] [h](x0) = [2 1]x0, [0 2 ] [d](x0) = [-& 0 ]x0, [2 2] [activate](x0) = [0 0]x0, [2 3] [c](x0) = [0 0]x0, [0 0] [g](x0) = [0 1]x0, [1 0 ] [n__f](x0) = [-& 0 ]x0, [3 1] [f](x0) = [0 0]x0 orientation: [6 4] [4 4] f(f(X)) = [3 1]X >= [2 1]X = c(n__f(g(n__f(X)))) [2 3] [2 2] c(X) = [0 0]X >= [0 0]X = d(activate(X)) [3 3] [2 3] h(X) = [2 1]X >= [0 1]X = c(n__d(X)) [3 1] [1 0 ] f(X) = [0 0]X >= [-& 0 ]X = n__f(X) [0 2 ] [0 1 ] d(X) = [-& 0 ]X >= [-& 0 ]X = n__d(X) [3 2] [3 1] activate(n__f(X)) = [1 0]X >= [0 0]X = f(X) [2 3] [0 2 ] activate(n__d(X)) = [0 1]X >= [-& 0 ]X = d(X) [2 2] activate(X) = [0 0]X >= X = X problem: f(f(X)) -> c(n__f(g(n__f(X)))) c(X) -> d(activate(X)) h(X) -> c(n__d(X)) f(X) -> n__f(X) d(X) -> n__d(X) activate(n__f(X)) -> f(X) activate(X) -> X Arctic Interpretation Processor: dimension: 2 interpretation: [0 0 ] [n__d](x0) = [-& 0 ]x0, [2 2] [h](x0) = [2 2]x0, [0 0] [d](x0) = [0 0]x0, [0 -&] [activate](x0) = [0 0 ]x0, [0 0] [c](x0) = [0 0]x0, [0 0] [g](x0) = [0 2]x0, [0 0 ] [n__f](x0) = [-& -&]x0, [0 0 ] [f](x0) = [0 -&]x0 orientation: [0 0] [0 0] f(f(X)) = [0 0]X >= [0 0]X = c(n__f(g(n__f(X)))) [0 0] [0 0] c(X) = [0 0]X >= [0 0]X = d(activate(X)) [2 2] [0 0] h(X) = [2 2]X >= [0 0]X = c(n__d(X)) [0 0 ] [0 0 ] f(X) = [0 -&]X >= [-& -&]X = n__f(X) [0 0] [0 0 ] d(X) = [0 0]X >= [-& 0 ]X = n__d(X) [0 0] [0 0 ] activate(n__f(X)) = [0 0]X >= [0 -&]X = f(X) [0 -&] activate(X) = [0 0 ]X >= X = X problem: f(f(X)) -> c(n__f(g(n__f(X)))) c(X) -> d(activate(X)) f(X) -> n__f(X) d(X) -> n__d(X) activate(n__f(X)) -> f(X) activate(X) -> X Arctic Interpretation Processor: dimension: 2 interpretation: [0 -&] [n__d](x0) = [-& -&]x0, [0 0 ] [d](x0) = [-& -&]x0, [2 1] [activate](x0) = [0 2]x0, [2 2] [c](x0) = [1 0]x0, [0 -&] [g](x0) = [-& -&]x0, [0 -&] [n__f](x0) = [0 3 ]x0, [1 -&] [f](x0) = [0 3 ]x0 orientation: [2 -&] [2 -&] f(f(X)) = [3 6 ]X >= [1 -&]X = c(n__f(g(n__f(X)))) [2 2] [2 2 ] c(X) = [1 0]X >= [-& -&]X = d(activate(X)) [1 -&] [0 -&] f(X) = [0 3 ]X >= [0 3 ]X = n__f(X) [0 0 ] [0 -&] d(X) = [-& -&]X >= [-& -&]X = n__d(X) [2 4] [1 -&] activate(n__f(X)) = [2 5]X >= [0 3 ]X = f(X) [2 1] activate(X) = [0 2]X >= X = X problem: f(f(X)) -> c(n__f(g(n__f(X)))) c(X) -> d(activate(X)) f(X) -> n__f(X) d(X) -> n__d(X) Arctic Interpretation Processor: dimension: 2 interpretation: [0 0 ] [n__d](x0) = [-& -&]x0, [0 3 ] [d](x0) = [-& 2 ]x0, [1 -&] [activate](x0) = [0 0 ]x0, [3 3] [c](x0) = [2 2]x0, [0 1] [g](x0) = [2 1]x0, [0 0] [n__f](x0) = [0 1]x0, [3 3] [f](x0) = [3 2]x0 orientation: [6 6] [6 6] f(f(X)) = [6 6]X >= [5 5]X = c(n__f(g(n__f(X)))) [3 3] [3 3] c(X) = [2 2]X >= [2 2]X = d(activate(X)) [3 3] [0 0] f(X) = [3 2]X >= [0 1]X = n__f(X) [0 3 ] [0 0 ] d(X) = [-& 2 ]X >= [-& -&]X = n__d(X) problem: f(f(X)) -> c(n__f(g(n__f(X)))) c(X) -> d(activate(X)) d(X) -> n__d(X) Arctic Interpretation Processor: dimension: 2 interpretation: [0 -&] [n__d](x0) = [-& -&]x0, [0 0 ] [d](x0) = [-& -&]x0, [0 0] [activate](x0) = [0 2]x0, [2 3] [c](x0) = [0 1]x0, [0 1 ] [g](x0) = [-& 1 ]x0, [0 2] [n__f](x0) = [0 1]x0, [0 3] [f](x0) = [2 3]x0 orientation: [5 6] [5 6] f(f(X)) = [5 6]X >= [3 4]X = c(n__f(g(n__f(X)))) [2 3] [0 2 ] c(X) = [0 1]X >= [-& -&]X = d(activate(X)) [0 0 ] [0 -&] d(X) = [-& -&]X >= [-& -&]X = n__d(X) problem: f(f(X)) -> c(n__f(g(n__f(X)))) d(X) -> n__d(X) Arctic Interpretation Processor: dimension: 2 interpretation: [0 -&] [n__d](x0) = [-& -&]x0, [3 0] [d](x0) = [0 0]x0, [0 2 ] [c](x0) = [0 -&]x0, [0 2] [g](x0) = [0 1]x0, [0 1 ] [n__f](x0) = [-& 0 ]x0, [0 2] [f](x0) = [0 1]x0 orientation: [2 3] [2 3] f(f(X)) = [1 2]X >= [1 2]X = c(n__f(g(n__f(X)))) [3 0] [0 -&] d(X) = [0 0]X >= [-& -&]X = n__d(X) problem: f(f(X)) -> c(n__f(g(n__f(X)))) Arctic Interpretation Processor: dimension: 2 interpretation: [0 1] [c](x0) = [0 0]x0, [0 -&] [g](x0) = [0 0 ]x0, [0 1 ] [n__f](x0) = [3 -&]x0, [0 3] [f](x0) = [3 3]x0 orientation: [6 6] [4 5] f(f(X)) = [6 6]X >= [4 4]X = c(n__f(g(n__f(X)))) problem: Qed