Results 71 to 80 of about 124,800 (224)

Further Complete Solutions to Four Open Problems on Filter of Logical Algebras

open access: yesInternational Journal of Computational Intelligence Systems, 2019
This paper focuses on the investigation of filters of pseudo BCK-algebra and BL-algebra, important and popular generic commutative and non-commutative logical algebras.
Wei Wang, Pengxi Yang, Yang Xu
doaj   +1 more source

Reflexivity of non-commutative Hardy algebras

open access: yesJournal of Functional Analysis, 2017
Let $H^{\infty}(E)$ be a non commutative Hardy algebra, associated with a $W^*$-correspondence $E$. These algebras were introduced in 2004, ~\cite{MuS3}, by P. Muhly and B. Solel, and generalize the classical Hardy algebra of the unit disc $H^{\infty}(\mathbb{D})$.
openaire   +2 more sources

A Note on Local Polynomial Regression for Time Series in Banach Spaces

open access: yesJournal of Time Series Analysis, EarlyView.
ABSTRACT This work extends local polynomial regression to Banach space‐valued time series for estimating smoothly varying means and their derivatives in non‐stationary data. The asymptotic properties of both the standard and bias‐reduced Jackknife estimators are analyzed under mild moment conditions, establishing their convergence rates.
Florian Heinrichs
wiley   +1 more source

An ordered structure of pseudo-{\rm BCI}-algebras [PDF]

open access: yesMathematica Bohemica, 2016
In Chajda's paper (2014), to an arbitrary BCI-algebra the author assigned an ordered structure with one binary operation which possesses certain antitone mappings.
Ivan Chajda, Helmut Länger
doaj   +1 more source

Aggregation and the Structure of Value

open access: yesNoûs, EarlyView.
ABSTRACT Roughly, the view I call “Additivism” sums up value across time and people. Given some standard assumptions, I show that Additivism follows from two principles. The first says that how lives align in time cannot, in itself, matter. The second says, roughly, that a world cannot be better unless it is better within some period or another.
Weng Kin San
wiley   +1 more source

Computing one of Victor Moll's irresistible integrals with computer algebra [PDF]

open access: yesComputer Science Journal of Moldova, 2008
We investigate a certain quartic integral from V. Moll's book “Irresistible Integrals” and demonstrate how it can be solved by computer algebra methods, namely by using non-commutative Gröbner bases.
Christoph Koutschan, Viktor Levandovskyy
doaj  

Non-Commutative Geometry and Twisted Conformal Symmetry

open access: yes, 2005
The twist-deformed conformal algebra is constructed as a Hopf algebra with twisted co-product. This allows for the definition of conformal symmetry in a non-commutative background geometry.
P. Di Francesco, Peter Matlock, V. Chari
core   +1 more source

Derivations of non-commutative group algebras

open access: yesJournal of Algebra and Its Applications
In this paper, we study the derivations of group algebras of some important groups, namely, Dihedral ([Formula: see text]), Dicyclic ([Formula: see text]) and Semi-dihedral ([Formula: see text]). First, we explicitly classify all inner derivations of a group algebra [Formula: see text] of a finite group [Formula: see text] over an arbitrary field ...
Praveen Manju, Rajendra Kumar Sharma
openaire   +2 more sources

The Mathematical History Behind the Granger–Johansen Representation Theorem

open access: yesOxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT When can a vector time series that is integrated once (i.e., becomes stationary after taking first differences) be described in error correction form? The answer to this is provided by the Granger–Johansen representation theorem. From a mathematical point of view, the theorem can be viewed as essentially a statement concerning the geometry of ...
Johannes M. Schumacher
wiley   +1 more source

Non commutative Lp spaces without the completely bounded approximation property

open access: yes, 2010
For any 1\leq p \leq \infty different from 2, we give examples of non-commutative Lp spaces without the completely bounded approximation property. Let F be a non-archimedian local field.
de la Salle, Mikael, Lafforgue, Vincent
core   +3 more sources

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