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An innovative aspect of this work in the use of second-order lambda calculus to record type information in the program.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This paper defines a set of type inference rules for resolving overloading introducted by type classes. Programs including type classes are transformed into ones which may be typed by the Hindley-Milner inference rules. In contrast to an other work on type classes, the rules presented here relate directly to user programs. 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