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(* Title: ZF/ex/Rmap
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ID: $Id$
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Author: Lawrence C Paulson, Cambridge University Computer Laboratory
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Copyright 1994 University of Cambridge
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Inductive definition of an operator to "map" a relation over a list
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*)
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Rmap = Main +
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consts
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rmap :: i=>i
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inductive
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domains "rmap(r)" <= "list(domain(r))*list(range(r))"
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intrs
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NilI "<Nil,Nil> \\<in> rmap(r)"
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ConsI "[| <x,y>: r; <xs,ys> \\<in> rmap(r) |] ==>
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<Cons(x,xs), Cons(y,ys)> \\<in> rmap(r)"
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type_intrs "[domainI,rangeI] @ list.intrs"
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end
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