Results 31 to 40 of about 43,216 (196)

The idempotent generated subsemigroup of the Kauffman monoid

, 2016
We characterise the elements of the (maximum) idempotent generated subsemigroup of the Kauffman monoid in terms of combinatorial data associated to certain normal forms.
Dolinka, Igor, East, James
core   +1 more source

Intraday Functional PCA Forecasting of Cryptocurrency Returns

Journal of Forecasting, EarlyView.
ABSTRACT We study the functional PCA (FPCA) forecasting method in application to functions of intraday returns on Bitcoin. We show that improved interval forecasts of future return functions are obtained when the conditional heteroscedasticity of return functions is taken into account.
Joann Jasiak, Cheng Zhong
wiley   +1 more source

On the Open Problem Related to Rank Equalities for the Sum of Finitely Many Idempotent Matrices and Its Applications

The Scientific World Journal, 2014
Tian and Styan have shown many rank equalities for the sum of two and three idempotent matrices and pointed out that rank equalities for the sum P1+⋯+Pk with P1,…,Pk be idempotent (k>3) are still open.
Mei-xiang Chen, Qing-hua Chen, Qiao-xin Li, Zhong-peng Yang   +3 more
doaj   +1 more source

A GRAPH WHICH RECOGNIZES IDEMPOTENTS OF A COMMUTATIVE RING [PDF]

Journal of Algebraic Systems, 2020
In this paper we introduce and study a graph on the set of ideals of a commutative ring $R$. The vertices of this graph are non-trivial ideals of $R$ and two distinct ideals $I$ and $J$ are adjacent if and only $IJ=Icap J$.
H. Dorbidi, S. Alikhani
doaj   +1 more source

Band‐Pass Filtering With High‐Dimensional Time Series. A Synthetic Indicator of the Medium‐to‐Long Run Component of Growth

Journal of Time Series Analysis, EarlyView.
ABSTRACT The paper deals with the construction of a synthetic indicator of economic growth, obtained by projecting a quarterly measure of aggregate economic activity, namely gross domestic product (GDP), into the space spanned by a finite number of smooth principal components, representative of the medium‐to‐long‐run component of economic growth of a ...
Alessandro Giovannelli, Marco Lippi, Tommaso Proietti   +2 more
wiley   +1 more source

The Structure of Semiconic Idempotent Commutative Residuated Lattices

Mathematics
In this paper, we study semiconic idempotent commutative residuated lattices. After giving some properties of such residuated lattices, we obtain a structure theorem for semiconic idempotent commutative residuated lattices. As an application, we make use
Wei Chen
doaj   +1 more source

On Discrete Idempotent Paths [PDF]

, 2019
The set of discrete lattice paths from (0, 0) to (n, n) with North and East steps (i.e. words w $\in$ { x, y } * such that |w| x = |w| y = n) has a canonical monoid structure inherited from the bijection with the set of join-continuous maps from the chain { 0, 1,. .. , n } to itself.
openaire   +2 more sources

SOS rule formats for idempotent terms and idempotent unary operators [PDF]

The Journal of Logic and Algebraic Programming, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Luca Aceto, Anna Ingólfsdóttir, Eugen-Ioan Goriac   +2 more
openaire   +2 more sources

Dynamics near an idempotent [PDF]

Topology and its Applications, 2020
15 pages, Comments and suggestions are welcome.
Shaikh, Md. Moid, Patra, Sourav Kanti, Ram, Mahesh Kumar   +2 more
openaire   +3 more sources

Musical Mereology

Pacific Philosophical Quarterly, EarlyView.
ABSTRACT I develop an axiomatic system of mereology that accounts for the ways in which musical works can be said to have parts. I distinguish two fundamental modes of composition that musical works exhibit: successive composition, whereby sound events are concatenated in time, and simultaneous composition, whereby sound events occur at the same time ...
Alejandro G. Di Rienzo
wiley   +1 more source