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Quaternary encoded binary circuits are more compact than their binary counterpart. Although several methods for designing binary reversible sequential circuits are presented, to the best of our knowledge, no design method for quaternary reversible sequential circuits has yet been reported in the literature. In this paper, we propose a design method for quaternary sequential circuits where the present...
The following computational problem was initiated by Manber and Tompa (22nd FOCS Conference, 1981) : Given a graph G = (V,E) and a real function f : V→R which is a proposed vertex coloring. Decide whether f is a proper vertex coloring of G. The elementary steps are taken to be linear comparisons. Lower bounds on the complexity of this problem are derived using the chromatic polynomial of G. It is...
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