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Equal Opportunity and Intergenerational Mobility: Going Beyond Intergenerational Income Transition Matrices
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Understanding the positive Grassmannian has been a highly significant question in mathematics for several decades. We discuss arrangements of equal minors in the totally positive Grassmannian. It was previously shown that arrangements of equals minors of largest value correspond to the simplices in Sturmfels triangulation. Here we discuss arrangements of equals minors of second largest value, a...
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We determine all complete intersection surface germs whose Pythagoras number is 2, and find they are all embedded in R and have the property that every positive semidefinite analytic function germ is a sum of squares of analytic function germs. In addition, we discuss completely these properties for mixed surface germs in R. Finally, we find in higher embedding dimension three different familie...
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ژورنال
عنوان ژورنال: Stochastic Processes and their Applications
سال: 1996
ISSN: 0304-4149
DOI: 10.1016/0304-4149(96)82955-3