A new method for information retrieval, based on the theory of relative concentration
SIGIR '90 Proceedings of the 13th annual international ACM SIGIR conference on Research and development in information retrieval
Content locality in distributed digital libraries
Information Processing and Management: an International Journal - Special issue on progress toward digital libraries
Zipfian and Lotkaian continuous concentration theory: Research Articles
Journal of the American Society for Information Science and Technology
Information Processing and Management: an International Journal - Special issue: Infometrics
Information Processing and Management: an International Journal - Special issue: Formal methods for information retrieval
Explicit expressions for the Leimkuhler curve in parametric families
Information Processing and Management: an International Journal
Pseudo-Riemann-Stieltjes integral
Information Sciences: an International Journal
Information Processing and Management: an International Journal - Special issue: Infometrics
Information Processing and Management: an International Journal - Special issue: Formal methods for information retrieval
The Henstock-Stieltjes integral for fuzzy-number-valued functions
Information Sciences: an International Journal
Mathematical and Computer Modelling: An International Journal
Comparing partial and truncated conglomerates from a concentration theoretic point of view
Mathematical and Computer Modelling: An International Journal
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Lorenz curves were invented to model situations of inequality in real life and applied in econometrics (distribution of wealth or poverty), biometrics (distribution of species richness), and informetrics (distribution of literature over their producers). Different types of Lorenz curves are hereby found in the literature, and in each case a theory of good concentration measures is presented. The present paper unifies these approaches by presenting one general model of concentration measure that applies to all these cases. Riemann-Stieltjes integrals are hereby needed where the integrand is a convex function and the integrator a function that generalizes the inverse of the derivative of the Lorenz function, in case this function is not everywhere differentiable. Calling this general measure C we prove that, if we have two Lorenz functions f, g such that f