Abstract
The problem of constructing a disjunctive strictness analysis for a higher-order, functional language is addressed. A system of disjunctive types for strictness analysis of typed lambda -calculus is introduced, and the types are used to define a program logic for strictness analysis. A disjunctive abstract interpretation is then obtained as a sound and complete model of the program logic. The results extend earlier work on using the tensor product of lattices to analyze disjunctive properties of programs by abstract interpretation.

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