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<!-- $Id$ -->
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<HTML><HEAD><TITLE>ZF/Coind/README</TITLE></HEAD><BODY>
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<H2>Coind -- A Coinduction Example</H2>
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Jacob Frost has mechanized the proofs from the article
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<P>
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<PRE>
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@Article{milner-coind,
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author = "Robin Milner and Mads Tofte",
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title = "Co-induction in Relational Semantics",
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journal = TCS,
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year = 1991,
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volume = 87,
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pages = "209--220"}
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</PRE>
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<P> It involves proving the consistency of the dynamic and static semantics
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for a small functional language. A codatatype definition specifies values and
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value environments in mutual recursion: non-well-founded values represent
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recursive functions; value environments are variant functions from variables
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into values.
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<P>
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Frost's
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<A
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HREF="http://www.cl.cam.ac.uk/Research/Reports/TR359-jf10008-co-induction-in-isabelle.dvi.gz">report</A> describes this development.
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</body>
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</html>
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