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arXiv · 2302.09367

Switching-Algebraic Calculation of Banzhaf Voting Indices

Ali Muhammad Rushdi·Muhammad Ali Rushdi
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Abstract

This paper employs switching-algebraic techniques for the calculation of a fundamental index of voting powers, namely, the total Banzhaf power. This calculation involves two distinct operations: (a) Boolean differencing or differentiation, and (b) computation of the weight (the number of true vectors or minterms) of a switching function. Both operations can be considerably simplified and facilitated if the pertinent switching function is symmetric or it is expressed in a disjoint sum-of-products form. We provide a tutorial exposition on how to implement these two operations, with a stress on situations in which partial symmetry is observed among certain subsets of a set of arguments. We introduce novel Boolean-based symmetry-aware techniques for computing the Banzhaf index by way of two prominent voting systems. These are scalar systems involving six variables and nine variables, respectively. The paper is a part of our ongoing effort for transforming the methodologies and concepts of voting systems to the switching-algebraic domain, and subsequently utilizing switching-algebraic tools in the calculation of pertinent quantities in voting theory.

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BibTeXRIS

Ali Muhammad Rushdi, Muhammad Ali Rushdi. 2023-02-18. Switching-Algebraic Calculation of Banzhaf Voting Indices. https://doi.org/10.47852/bonviewjcce3202746

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