We study how to preserve universal termination besides computed answer substitutions while transforming definite programs. We consider the unfold operation both alone and combined with the introduction of a new definition and fold operations. We prove that unfold always preserves universal termination. Moreover we define a restricted version of the Tamaki-Sato's transformation sequence and show that it preserves universal termination as well.
Preserving Universal Termination through Unfold/Fold
COCCO, Nicoletta
1994-01-01
Abstract
We study how to preserve universal termination besides computed answer substitutions while transforming definite programs. We consider the unfold operation both alone and combined with the introduction of a new definition and fold operations. We prove that unfold always preserves universal termination. Moreover we define a restricted version of the Tamaki-Sato's transformation sequence and show that it preserves universal termination as well.
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