Fully persistent lists with catenation

Abstract
This paper considers the problem of representing stacks with catenation so that any stack, old or new, is available for access or update operations. This problem arises in the implementation of list-based and functional programming languages. A solution is proposed requiring constant time and space for each stack operation except catenation, which requires O(log logk) time and space. Herekis the number of stack operations done before the catenation. All the resource bounds are amortized over the sequence of operations.

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