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doc-src/Tutorial/Datatype/absubsta
author paulson
Fri, 24 Jan 2003 18:13:59 +0100
changeset 13786 ab8f39f48a6f
parent 5851 15ce4c1c8313
permissions -rw-r--r--
More conversion of UNITY to Isar new-style theories
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primrec
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  "substa s (IF b a1 a2) =
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     IF (substb s b) (substa s a1) (substa s a2)"
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  "substa s (Sum a1 a2) = Sum (substa s a1) (substa s a2)"
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  "substa s (Diff a1 a2) = Diff (substa s a1) (substa s a2)"
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  "substa s (Var v) = s v"
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  "substa s (Num n) = Num n"
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