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Sugeno's negations and T-norms.

Gaspar Mayor Forteza — 1994

Mathware and Soft Computing

A functional characterization of Sugeno's negations is presented and as a consequence, we study a family of non strict Archimedean t-norms whose (vertical-horizontal) sections are straight lines.

Fractal negations.

Gaspar Mayor FortezaTomasa Calvo Sánchez — 1994

Mathware and Soft Computing

From the concept of attractor of a family of contractive affine transformations in the Euclidean plane R, we study the fractality property of the De Rham function and other singular functions wich derive from it. In particular, we show as fractals the strong negations called k-negations.

On quasi-homogeneous copulas

Gaspar MayorRadko MesiarJoan Torrens — 2008

Kybernetika

Quasi-homogeneity of copulas is introduced and studied. Quasi-homogeneous copulas are characterized by the convexity and strict monotonicity of their diagonal sections. As a by-product, a new construction method for copulas when only their diagonal section is known is given.

Generation of multi-dimensional aggregation functions.

Margalida Mas GrimaltGaspar Mayor FortezaJaume SuñerJoan Torrens — 1998

Mathware and Soft Computing

In this paper we study two ways of generating multi-dimensional aggregation functions. First of all we obtain multi-dimensional OWA operators in two different ways, one of them through quantifiers and the other through sequences. In the first case, we see that all the operators we obtain are multi-dimensional aggregation functions. We then characterize the multi-dimensional aggregation functions that are generated by quantifiers. In the second case, we characterize the sequences that provide multi-dimensional...

On dispersion measures.

Javier MartínGaspar Mayor FortezaJaume Suñer — 2001

Mathware and Soft Computing

In this paper a new framework for the study of measures of dispersion for a class of n-dimensional lists is proposed. The concept of monotonicity with respect to a sharpened-type order is introduced. This type of monotonicity, together with other well known conditions, allows to create a reasonable and general ambit where the notion of dispersion measure can be studied. Some properties are analized and relations with other approaches carried out by different authors on this subject are established....

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