On the Optimal Point of the Weighted Simpson Index

Author:

Casquilho José Pinto1,Mena-Matos Helena2

Affiliation:

1. Postgraduate and Research Program, Universidade Nacional Timor Lorosa’e (UNTL), Díli, Timor-Leste

2. Centro de Matemática da Universidade do Porto (CMUP), Faculdade de Ciências da Universidade do Porto (FCUP), 4169-007 Porto, Portugal

Abstract

In this short communication, following a brief introduction, we undertake a comprehensive analytical study of the weighted Simpson index. Our primary emphasis concerns the precise determination of the optimal point (minimizer) coordinates and of the minimum value of the index, a differentiable convex function, which is related to the harmonic mean concept. Furthermore, we address and solve the inversion problem and show the tight connection between both approaches. Last, we give some insights and final remarks on this subject.

Funder

FCT—Fundação para a Ciência e a Tecnologia, I.P.

Publisher

MDPI AG

Reference27 articles.

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3. On the Gini-Simpson index and its generalization—A historic note;Casquilho;S. Afr. Stat. J.,2018

4. Gini, C. (1912). Variabilità e Mutabilità: Contributo Allo Studio Delle Distribuzioni e Delle Relazioni Statistiche, C. Cuppini. Available online: https://www.byterfly.eu/islandora/object/librib:680892#mode/2up.

5. Diversity and dissimilarity coefficients: A unified approach;Rao;Theor. Popul. Biol.,1982

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