5.05/1.59	YES
5.05/1.59	
5.05/1.59	Problem:
5.05/1.59	 strict:
5.05/1.59	  a(a(x1)) -> x1
5.05/1.59	 weak:
5.05/1.59	  a(a(x1)) -> b(a(a(a(b(x1)))))
5.05/1.59	
5.05/1.59	Proof:
5.05/1.59	 Arctic Interpretation Processor:
5.05/1.59	  dimension: 2
5.05/1.59	  interpretation:
5.05/1.59	             [0  -&]  
5.05/1.59	   [b](x0) = [0  -&]x0,
5.05/1.59	   
5.05/1.59	             [0  0 ]  
5.05/1.59	   [a](x0) = [4  -&]x0
5.05/1.59	  orientation:
5.05/1.59	              [4 0]             
5.05/1.59	   a(a(x1)) = [4 4]x1 >= x1 = x1
5.05/1.59	   
5.05/1.59	              [4 0]      [4  -&]                      
5.05/1.59	   a(a(x1)) = [4 4]x1 >= [4  -&]x1 = b(a(a(a(b(x1)))))
5.05/1.59	  problem:
5.05/1.59	   strict:
5.05/1.59	    
5.05/1.59	   weak:
5.05/1.59	    a(a(x1)) -> b(a(a(a(b(x1)))))
5.05/1.59	  Qed
5.05/1.60	EOF