2.06/1.12	YES
2.06/1.12	
2.06/1.12	Proof:
2.06/1.12	This system is confluent.
2.06/1.12	By \cite{ALS94}, Theorem 4.1.
2.06/1.12	This system is of type 3 or smaller.
2.06/1.12	This system is strongly deterministic.
2.06/1.12	This system is quasi-decreasing.
2.06/1.12	By \cite{O02}, p. 214, Proposition 7.2.50.
2.06/1.12	This system is of type 3 or smaller.
2.06/1.12	This system is deterministic.
2.06/1.12	System R transformed to optimized U(R).
2.06/1.12	This system is terminating.
2.06/1.12	Call external tool:
2.06/1.12	./ttt2.sh
2.06/1.12	Input:
2.06/1.12	  a -> c
2.06/1.12	  b -> c
2.06/1.12	  f(x) -> ?1(a, x)
2.06/1.12	  ?1(x, x) -> x
2.06/1.12	
2.06/1.12	 Polynomial Interpretation Processor:
2.06/1.12	  dimension: 1
2.06/1.12	  interpretation:
2.06/1.12	   [?1](x0, x1) = 2x0 + -1x1 + 2x1x1 + 1,
2.06/1.12	   
2.06/1.12	   [f](x0) = 4x0x0 + 6,
2.06/1.12	   
2.06/1.12	   [b] = 4,
2.06/1.12	   
2.06/1.12	   [c] = 0,
2.06/1.12	   
2.06/1.12	   [a] = 2
2.06/1.12	  orientation:
2.06/1.12	   a() = 2 >= 0 = c()
2.06/1.12	   
2.06/1.12	   b() = 4 >= 0 = c()
2.06/1.12	   
2.06/1.12	   f(x) = 4x*x + 6 >= -1x + 2x*x + 5 = ?1(a(),x)
2.06/1.12	   
2.06/1.12	   ?1(x,x) = x + 2x*x + 1 >= x = x
2.06/1.12	  problem:
2.06/1.12	   
2.06/1.12	  Qed
2.06/1.12	All 0 critical pairs are joinable.
2.06/1.12	
2.06/1.14	EOF