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** (.):** functional flow block diagram, system of equations solution, universal algebra, iterative method

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** (.):** We investigate the problem of interacting subjects' coordination and consider a procedure, which iteratively tunes the state of one subject to reconcile it with states of its neighbors. Every step results in coordination of one subject, but other subjects may become uncoordinated even if they were tuned before. We derive the conditions when this process stabilizes. We also discuss subjects' characteristics which guarantee tunability of any network of such subjects, and construct a corresponding tuning algorithm.

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