| M.J.C. Gordon, Th. Melham, D. Sheperd, and A. Boulton. The UNWIND Library. Manual part of the HOL system, 1988. |
....4: Simplify the subgoals To curtail the complexity of the subgoals to be solved by an automatic prover, certain simplifications are in order. One of the main simplifications corresponds to the elimination of existentially quantified variables (internal lines) in the subgoals. The UNWIND library [38] in HOL contains a rich set of rules and conversions for performing such simplifications. A closer study of this library, within our restricted higher order context, has motivated us to examine the possibility of completely automating this step. This has been achieved by rewriting the subgoals ....
M.J.C. Gordon, Th. Melham, D. Sheperd, and A. Boulton. The UNWIND Library. Manual part of the HOL system, 1988.
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