Reversify any sequential algorithm

05/12/2021

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by   Yuri Gurevich, et al.

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To reversify an arbitrary sequential algorithm A, we gently instrument A with bookkeeping machinery. The result is a step-for-step reversible algorithm that mimics A step-for-step and stops exactly when A does. Without loss of generality, we presume that algorithm A is presented as an abstract state machine that is behaviorally identical to A. The existence of such representation has been proven theoretically, and the practicality of such representation has been amply demonstrated.