Results 91 to 100 of about 68,753 (202)

Estimation of Change Points for Non‐Linear (Auto‐)Regressive Processes Using Neural Network Functions

Journal of Time Series Analysis, Volume 47, Issue 3, Page 539-556, May 2026.
ABSTRACT In this paper, we propose a new test for the detection of a change in a non‐linear (auto‐)regressive time series as well as a corresponding estimator for the unknown time point of the change. To this end, we consider an at‐most‐one‐change model and approximate the unknown (auto‐)regression function by a neural network with one hidden layer. It
Claudia Kirch, Stefanie Schwaar
wiley   +1 more source

Wild conductor exponents of curves

Bulletin of the London Mathematical Society, Volume 58, Issue 5, May 2026.
Abstract We give an explicit formula for wild conductor exponents of plane curves over Qp$\mathbb {Q}_p$ in terms of standard invariants of explicit extensions of Qp$\mathbb {Q}_p$, generalising a formula for hyperelliptic curves. To do so, we prove a general result relating the wild conductor exponent of a simply branched cover of the projective line ...
Harry Spencer
wiley   +1 more source

On the spectrum of tridiagonal matrices with two-periodic main diagonal

Special Matrices
We find the spectrum and eigenvectors of an arbitrary irreducible complex tridiagonal matrix with two-periodic main diagonal. This is expressed in terms of the spectrum and eigenvectors of the matrix with the same sub- and superdiagonals and zero main ...
Dyachenko Alexander, Tyaglov Mikhail
doaj   +1 more source

Polymatroidal tilings and the Chow class of linked projective spaces

Bulletin of the London Mathematical Society, Volume 58, Issue 5, May 2026.
Abstract Linked projective spaces are quiver Grassmannians of constant dimension one of certain quiver representations, called linked nets, over certain quivers, called Zn$\mathbb {Z}^n$‐quivers. They were recently introduced as a tool for describing schematic limits of families of divisors.
Felipe de Leon, Eduardo Esteves
wiley   +1 more source

The radical factors of f(x)−f(y) over finite fields

International Journal of Mathematics and Mathematical Sciences, 1997
Let F denote the finite field of order q For f(x) in F[x], let f*(x,y) denote the substitution polynomial f(x)−f(y). The polynomial f*(x,y) has frequently been used in questions on the values set of f(x) In this paper we consider the irreducible factors ...
Javier Gomez-Calderon
doaj   +1 more source

The fundamental group of the complement of a generic fiber‐type curve

Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.
Abstract In this paper, we describe and characterize the fundamental group of the complement of generic fiber‐type curves, that is, unions of (the closure of) finitely many generic fibers of a component‐free pencil F=[f:g]:CP2⤍CP1$F=[f:g]:\mathbb {C}\mathbb {P}^2\dashrightarrow \mathbb {C}\mathbb {P}^1$.
José I. Cogolludo‐Agustín, Eva Elduque   +1 more
wiley   +1 more source

Vector-Valued Jack Polynomials from Scratch

Symmetry, Integrability and Geometry: Methods and Applications, 2011
Vector-valued Jack polynomials associated to the symmetric group S_N are polynomials with multiplicities in an irreducible module of S_N and which are simultaneous eigenfunctions of the Cherednik-Dunkl operators with some additional properties concerning
Jean-Gabriel Luque, Charles F. Dunkl
doaj   +1 more source

ALGORITHM FOR SOLVING SYSTEMS OF LINEAR EQUATIONS IN FIELD Fpk

Міжнародний науково-технічний журнал "Проблеми керування та інформатики"
Basic theoretical concepts of finite fields area are considered, including concepts of residue field and extension of residue field. The algorithms necessary for constructing extensions ef residue fields are given: a Rabin test for checking ...
С.Л. Кривий, Г.І. Гогерчак   +1 more
doaj   +1 more source

Irreducible decomposition of polynomial ideals

Journal of Symbolic Computation, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
FORTUNA, ELISABETTA, GIANNI, PATRIZIA, TRAGER B.   +2 more
openaire   +4 more sources

P-irreducibility of binding polynomials

Computers & Mathematics with Applications, 1999
The authors present a new criterion for positive polynomials of degree 3 or 4, which can be expressed only by the coefficients of the given polynomials without finding the roots location first. The derived results are useful for studying many physiological processes.
Zhi, Lihong, Liu, Zhuojun
openaire   +2 more sources