Rewriting systems | Lambda calculus

Director string

In mathematics, in the area of lambda calculus and computation, directors or director strings are a mechanism for keeping track of the free variables in a term. Loosely speaking, they can be understood as a kind of memoization for free variables; that is, as an optimization technique for rapidly locating the free variables in a term algebra or in a lambda expression. Director strings were introduced by Kennaway and Sleep in 1982 and further developed by Sinot, Fernández and Mackie as a mechanism for understanding and controlling the computational complexity cost of beta reduction. (Wikipedia).

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Related pages

Lambda calculus | Expression (mathematics) | Power set | Mathematics | Function (mathematics) | Computation | Explicit substitution | Arity | Analysis of algorithms | Term algebra