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(* Title: HOL/SetInterval.thy
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ID: $Id$
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Author: Tobias Nipkow
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Copyright 1998 TU Muenchen
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lessThan, greaterThan, atLeast, atMost
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*)
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SetInterval = equalities +
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constdefs
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lessThan :: "('a::ord) => 'a set" ("(1{.._'(})")
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"{..u(} == {x. x<u}"
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atMost :: "('a::ord) => 'a set" ("(1{.._})")
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"{..u} == {x. x<=u}"
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greaterThan :: "('a::ord) => 'a set" ("(1{')_..})")
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"{)l..} == {x. l<x}"
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atLeast :: "('a::ord) => 'a set" ("(1{_..})")
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"{l..} == {x. l<=x}"
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end
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