(Elsevier, 2025-02-01) Roldán López de Hierro, Antonio Francisco; Roldán, Concepción; Guerra Errea, Carlos; Fernández Fernández, Francisco Javier; Cruz, Anderson; Moraes, Ronei Marcos de; Bustince Sola, Humberto; Estadística, Informática y Matemáticas; Estatistika, Informatika eta Matematika
In this work, we introduce the notion of grouping index for type-2 fuzzy sets as a measure of how far the union of two type-2 fuzzy sets over the same universe is from the total universe. We also show how we can extend the notion of the Jaccard index to the type-2 setting by means of type-2 grouping and overlap indexes.
