Search results for "Analisi Matematica"
showing 10 items of 811 documents
A short survey on Lie theory and Finsler geometry
2017
The aim of this chapter is to provide readers with a common thread to the many topics dealt with in this book, which is intermediate and which aims at postgraduate students and young researchers, wishing to intrigue those who are not experts in some of the topics. We also hope that this book will contribute in encouraging new collaborations among disciplines which have stemmed from related problems. In this context, we take the opportunity to recommend the book by Hawkins [18]. A basic bibliography is outlined between the lines.
On the 2-(25, 5, λ) design of zero-sum 5-sets in the Galois field GF(25)
2017
In this paper we consider the incidence structure ${\mathcal{D}}=({\mathcal{F}},{\mathcal{B}}_5^{0}),$ where ${\mathcal{F}}$ is the Galois field with $25$ elements, and ${\mathcal{B}}_5^{0}$ is the family of all $5$-subsets of $\mathcal F$ whose elements sum up to zero. It is known that ${\mathcal{D}}$ is a $2$-$(25,5,71)$ design. Here we provide two alternative, direct proofs of this result and, moreover, we prove that ${\mathcal{D}}$ is not a $3$-design. Furthermore, if ${\mathcal{B}}_5^{x}$ denotes the family of all $5$-subsets of $\mathcal F$ whose elements sum up to a given element $x \in \mathcal F,$ we also provide an alternative, direct proof that $({\mathcal{F}},{\mathcal{B}}_5^{x}…
On some parameters related to weak noncompactness in L1(μ,E)
2009
A weak measure of noncompactness γU is defined in a Banach space in terms of convex compactness. We obtain relationships between the measure γU(A) of a bounded set A in the Bochner space L1(μ,E) and two parameters Π(A) and Λ1(A).
Order boundedness and spectrum in locally convex quasi *-algebras
2021
After a quick sketch of the basic aspects of locally convex quasi *-algebras, we focus on order bounded elements and use them to analyze some spectral properties, trying to generalize the approach already studied in the Banach case.
Order bounded elements of topological *-algebras
2012
Several different notions of {\em bounded} element of a topological *-algebra $\A$ are considered. The case where boundedness is defined via the natural order of $\A$ is examined in more details and it is proved that under certain circumstances (in particular, when $\A$ possesses sufficiently many *-representations) {\em order boundedness} is equivalent to {\em spectral boundedness}.
MR2849476Proskurin, D. On C∗-algebra generated by Fock representation of Wick algebra with braided coefficients. Methods Funct. Anal. Topology 17 (20…
2012
MR2991872 Bender, Carl M.; Kuzhel, Sergii Unbounded C-symmetries and their nonuniqueness. J. Phys. A 45 (2012), no. 44, 444005, 14 pp. (Reviewer: Cam…
2013
Far From Equilibrium Constitutive Relations in a Nonlinear Model of Superfluid Turbulence
2009
In this paper the complete nonlinear far from equilibrium constitutive theory in a non standard model of superfluid turbulence is studied and the consequences of all the relations obtained using the Liu method of Lagrange multipliers are investigated.
CQ*-algebras and noncommutative measure
2012
In this paper we continue the investigations in [4], [5], [8], [13], [14], [15], and [19], of the structure of quasi *-algebras and extend the results in [1] and [2]. Here, noncommutative Tp-spaces are shown to constitute examples of a class of Banach C*-modules called CQ*-algebras. Moreover, it is shown that any (strongly) *-semisimple proper CQ*-algebra (X ,A), with A a separable C*-algebra, can be represented as a CQ*-algebra of type Tp.