A Dual Measure of Uncertainty: The Deng Extropy

Abstract

The extropy has recently been introduced as the dual concept of entropy. Moreover, in the context of the Dempster-Shafer evidence theory, Deng studied a new measure of discrimination, named the Deng entropy. In this paper, we define the Deng extropy and study its relation with Deng entropy, and examples are proposed in order to compare them. The behaviour of Deng extropy is studied under changes of focal elements. A characterization result is given for the maximum Deng extropy and, finally, a numerical example in pattern recognition is discussed in order to highlight the relevance of the new measure.

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