In this note, we present conditions for the existence and uniqueness of stable causal solution for bilinear time series with periodic coeécients. Conditions for the existence of higher-order moments and invertibility are also given

Reflection, in the sense of [Fr03a] and [Fr03b], is based on the idea that a category of classes has a subclass that is “similar” to the category. Here we present axiomatizations based on the idea that a category of classes that does not form a class has extensionally different subclasses...

In this paper we are going to show the existence of a nontrivial solution to the following model problem,As one can see the right hand side is superlinear. But we can not use an Ambrosetti-Rabinowitz condition in order to obtain that the corresponding energy functional satisfies (PS) condition....

A sequential method is applied to find the values of the proportions of each component that allow obtaining a mixture with better properties.Simplexes of small sizes are used. They are of the same dimension that the space of mixtures that is a simplex of dimension q-1. These Simplexes are...

This paper concerns the harmonic projection methods for computing an approximation to an eigenpair (Λ, of a large matrix . Given a target point τ and a subspace W that contains an approximation to i, a harmonic projection method returns an approximation to Three convergence results are...

The Hermite-Hadamard double inequality is the first fundamental result for convex functions defined on a interval of real numbers with a natural geometrical interpretation and a loose number of applications for particular inequalities. In this monograph we present the basic facts related to...

We present some new set and class theoretic independence results from and that are particularly simple and close to the primitives of membership and equality (see sections 4,5). They are shown to be equivalent to familiar small large cardinal hypotheses. We modify these independendent statements...