Sparsity

Micol Federica Tresoldi
Despite its generic title, this thesis is about a specific notion of sparsity, the one introduced by McCullagh and Polson (2018). In that paper, the intuitive idea that sparsity, in a statistical framework, refers to those ''phenomena that are mostly negligible or seldom appreciably large'', has, for the first time, been given a mathematical definition. In studying this definition of statistical sparsity as a limiting property of a sequence of probability distributions, research has proceeded...
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