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-<H1>Lambda Calculus in de Bruijn's Notation</H1>
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-This theory defines lambda-calculus terms with de Bruijn indixes and proves
-confluence of beta, eta and beta+eta.
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-The paper
-<A HREF="http://www.in.tum.de/~nipkow/pubs/jar2001.html">
-More Church-Rosser Proofs (in Isabelle/HOL)</A>
-describes the whole theory.
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-<P>Last modified 20.5.2000
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