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Materias / palabras clave: Product differentiation; Competition (biology); Economics; Product (mathematics); Microeconomics; Mathematics; Cournot competition; Biology; Geometry; Ecology

A general formula ( α ) of which a special case is the Kuder-Richardson coefficient of equivalence is shown to be the mean of all split-half coefficients resulting from different splittings of a test. α is therefore an...

Materias / palabras clave: Mathematics; Mathematical optimization; Heuristic; Differentiable function; Pure mathematics

Materias / palabras clave: Mathematics; Generalization; Fuzzy set; Modal; Set (abstract data type); Algebra over a field; Fuzzy set operations; Discrete mathematics; Fuzzy logic; Pure mathematics; Artificial intelligence; Computer science

With the continuous expansion of data availability in many large-scale, complex, and networked systems, such as surveillance, security, Internet, and finance, it becomes critical to advance the fundamental understanding ...

Materias / palabras clave: Rough set; Fuzzy set; Mathematics; Set theory; Fuzzy logic; Computer science; Discrete mathematics; Set (abstract data type); Algebra over a field; Algorithm; Pure mathematics; Artificial intelligence

Materias / palabras clave: Mathematics; Series (stratigraphy); Table (database); Order of integration (calculus); Algebra over a field; Mathematical analysis; Pure mathematics; Data mining; Computer science; Biology; Paleontology

We show that the large N limit of certain conformal field theories in various dimensions include in their Hilbert space a sector describing supergravity on the product of Anti-deSitter spacetimes, spheres and other compa...

This paper presents an overview of the field of recommender systems and describes the current generation of recommendation methods that are usually classified into the following three main categories: content-based, coll...

Abstract This paper develops a new approach to the problem of testing the existence of a level relationship between a dependent variable and a set of regressors, when it is not known with certainty whether the underlying...

An unknown quantum state \ensuremath{\Vert}\ensuremath{\varphi}〉 can be disassembled into, then later reconstructed from, purely classical information and purely nonclassical Einstein-Podolsky-Rosen (EPR) correlations....