doc-src/Intro/bool_nat.thy
author wenzelm
Mon Oct 01 21:19:50 2007 +0200 (2007-10-01)
changeset 24803 38577b4b1fde
parent 105 216d6ed87399
permissions -rw-r--r--
Norbert Schirmer: record improvements;
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BoolNat = Arith +
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types   bool,nat    0
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arities bool,nat    :: arith
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consts  Suc         :: "nat=>nat"
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rules   add0        "0 + n = n::nat"
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        addS        "Suc(m)+n = Suc(m+n)"
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        nat1        "1 = Suc(0)"
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        or0l        "0 + x = x::bool"
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        or0r        "x + 0 = x::bool"
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        or1l        "1 + x = 1::bool"
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        or1r        "x + 1 = 1::bool"
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end