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Is alpha-conversion easy? (1303.5039v5)
Published 20 Mar 2013 in cs.LO and math.LO
Abstract: We present a new lambda-calculus with explicit substitutions and named variables. Renaming of bound variables in this calculus is explicit (there is a special rewrite rule) and can be delayed. Contexts (environments) are not sets or lists without multiplicity, but have a more complicated structure. There is a natural order on the set of contexts. A "set" of free variables is not a set, but a context in the new sense. New definitions simplify working with alpha-conversion.