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In this paper, we propose a general model for plane-based clustering. The general model contains many existing plane-based clustering methods, e.g., k-plane clustering (kPC), proximal plane clustering (PPC), twin support vector clustering…

Machine Learning · Computer Science 2020-09-24 Zhen Wang , Yuan-Hai Shao , Lan Bai , Chun-Na Li , Li-Ming Liu

We study a generalisation of the set-theoretic Yang-Baxter equation and investigate the connection between its solutions and matrix refactorisation problems. We refer to such solutions as scalene Yang-Baxter maps. Moreover, we construct…

Exactly Solvable and Integrable Systems · Physics 2026-05-01 S. Konstantinou-Rizos , T. Kouloukas

We interpret a formula established by Lapid-M\'{\i}nguez on real regular representations of ${\rm GL}_n$ over a local non-archimedean field as a matrix determinant. We use the Lewis Carroll determinant identity to prove new relations…

Representation Theory · Mathematics 2023-01-03 Léa Bittmann

We create a sequence version of calculus. First, we define equivalence, some fundamental operations, differential, and integral for sequences. Then, we propose sequence versions of identity function, power function, exponential function,…

General Mathematics · Mathematics 2022-04-26 Yusuke Imai

We introduce a generalized similarity analysis which grants a qualitative description of the localised solutions of any nonlinear differential equation. This procedure provides relations between amplitude, width, and velocity of the…

Mathematical Physics · Physics 2009-10-31 A. Ludu , G. Stoitcheva , J. P. Draayer

We introduce and study a generalized Parikh matrix mapping based on tracking the occurrence counts of special types of subsequences. These matrices retain more information about a word than the original Parikh matrix mapping while…

Formal Languages and Automata Theory · Computer Science 2024-07-08 Szilárd Zsolt Fazekas , Xinhao Huang

In this paper we introduce I^K-convergence which is a common generalization of the I^K-convergence of sequences, double sequences and nets. We show that many results that were shown before for these special cases are true for the…

General Topology · Mathematics 2011-09-14 Martin Mačaj , Martin Sleziak

We introduce the notion of $GL(n)$-dependence of matrices, which is a generalization of linear dependence taking into account the matrix structure. Then we prove a theorem, which generalizes, on the one hand, the fact that $n+1$ vectors in…

Rings and Algebras · Mathematics 2025-10-16 Natalia Tsilevich , Yahel Manor

Under certain mild assumption, we establish a one-to-one correspondence between solutions of the Nehari-Takagi problem and solutions of some Takagi-Sarason interpolation problem. The resolvent matrix of the Nehari-Takagi problem is shown to…

Functional Analysis · Mathematics 2015-12-22 Volodymyr Derkach , Olena Sukhorukova

We use ring-theoretic methods and methods from the theory of skew braces to produce set-theoretic solutions to the reflection equation. We also use set-theoretic solutions to construct solutions to the parameter-dependent reflection…

Rings and Algebras · Mathematics 2020-01-16 Agata Smoktunowicz , Leandro Vendramin , Robert Weston

This article is a short review on the relationship between convergent matrix integrals, formal matrix integrals, and combinatorics of maps. We briefly summarize results developed over the last 30 years, as well as more recent discoveries.…

Mathematical Physics · Physics 2007-05-23 Bertrand Eynard

We give a general formula for the equivariant complex $K$-theory $K_G^*(V)$ of a finite dimensional real linear space $V$ equipped with a linear action of a compact group $G$ in terms of the representation theory of a certain double cover…

K-Theory and Homology · Mathematics 2009-03-06 Siegfried Echterhoff , Oliver Pfante

In this article, we define a very important sequence of functions, all the functions of this sequence present behaviors very close to that of the Collatz function. The study of such functions allows us to obtain very interesting results…

General Mathematics · Mathematics 2021-07-13 Raouf Rajab

Consider $k\ge 2$ distinct, linearly independent, homogeneous linear recurrences of order $k$ satisfying the same recurrence relation. We prove that the recurrences are related to a decomposable form of degree $k$, and there is a very broad…

Number Theory · Mathematics 2023-08-29 Kalman Gyory , Attila Petho , Laszlo Szalay

The theory of the functional sequences and series is presented; uniformly convergent, convergent in the sense of a mean square and weakly convergent sequences and series are considered. Sequential approach to constructing generalized…

Mathematical Physics · Physics 2011-09-13 Mykhaylo Sukhorolsky

We study symplectic linear algebra over the ring $\Rt$ of Colombeau generalized numbers. Due to the algebraic properties of $\Rt$ it is possible to preserve a number of central results of classical symplectic linear algebra. In particular,…

Rings and Algebras · Mathematics 2014-07-01 Sanja Konjik , Guenther Hoermann , Michael Kunzinger

Subsequently to the author's preceding paper, we give full proofs of some explicit formulas about factorizations of $K$-$k$-Schur functions associated with any multiple $k$-rectangles.

Combinatorics · Mathematics 2017-04-28 Motoki Takigiku

Combining the derivative operator with a binomial sum from the telescoping method, we establish a family of summation formulas involving generalized harmonic numbers.

Combinatorics · Mathematics 2012-03-14 Chuanan Wei , Qinglun Yan , Dianxuan Gong

Associated to each random variable $Y$ having a finite moment generating function, we introduce a different generalization of the Stirling numbers of the second kind. Some characterizations and specific examples of such generalized numbers…

Number Theory · Mathematics 2018-03-14 José A. Adell , Alberto Lekuona

We extend the validity domain of the conjecture about the average generalized integral means spectrum of whole-plane SLE introduced in [7, 8]. Thence we improve the results obtained in [7, 8] on the average generalized integral means…

Probability · Mathematics 2022-03-22 Xuan Ho