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Notions of the orthogonality and convolution orthogonality are explored with the use of the Kontorovich-Lebedev transform and its convolution. New classes of the corresponding orthogonal polynomials and functions are investigated. Integral…

Classical Analysis and ODEs · Mathematics 2019-09-24 Semyon Yakubovich

We discuss the principle tools and results and state a few open problems concerning the classification and topology of plane sextics and trigonal curves in ruled surfaces.

Algebraic Geometry · Mathematics 2016-09-07 Alex Degtyarev

It is revealed that there exist duality families of the KdV type equation. A duality family consists of an infinite number of generalized KdV (GKdV) equations. A duality transformation relates the GKdV equations in a duality family. Once a…

Mathematical Physics · Physics 2023-01-16 Xin Gu , Yuan-Yuan Liu , Wen-Du Li , Wu-Sheng Dai

In this paper, we obtain pointwise convergence of solutions to the Schrodinger equation along a class of curves in $\mathbb{R}^{2}$ by the polynomial partitioning.

Classical Analysis and ODEs · Mathematics 2018-07-03 Wenjuan Li , Huiju Wang

We formulate a refined theory of linear systems, using the methods of a previous paper, "A Theory of Branches for Algebraic Curves", and use it to give a geometric interpretation of the genus of an algebraic curve. Using principles of…

Algebraic Geometry · Mathematics 2010-03-31 Tristram de Piro

In previous work we determined automorphism groups of cyclic algebraic curves defined over fields of any odd characteristic. In this paper we determine parametric equations of families of curves for each automorphism group for such curves.

Algebraic Geometry · Mathematics 2013-01-22 R. Sanjeewa , T. Shaska

We discuss solutions of several questions concerning the geometry of conformal planes.

Differential Geometry · Mathematics 2022-11-29 Alexander Lytchak

In this paper we discuss some properties of fundamental groups and Alexander polynomials of plane curves. We discuss the relationship of the non-triviality of Alexander polynomials and the notion of (nearly) freeness for irreducible plane…

Algebraic Geometry · Mathematics 2017-08-30 Enrique Artal Bartolo , Alexandru Dimca

It is shown that coassociative cones in R^7 that are r-oriented and ruled by 2-planes are equivalent to CR-holomorphic curves in the oriented Grassmanian of 2-planes in R^7. The geometry of these CR-holomorphic curves is studied and related…

Differential Geometry · Mathematics 2007-05-23 Daniel Fox

We formulate an isoperimetric deformation of curves on the Minkowski plane, which is governed by the defocusing mKdV equation. Two classes of exact solutions to the defocusing mKdV equation are also presented in terms of the $\tau$…

Differential Geometry · Mathematics 2019-09-04 Hyeongki Park , Jun-ichi Inoguchi , Kenji Kajiwara , Ken-ichi Maruno , Nozomu Matsuura , Yasuhiro Ohta

Special polynomials associated with rational solutions of the second Painlev\'{e} equation and other members of its hierarchy are discussed. New approach, which allows one to construct each polynomial is presented. The structure of the…

Exactly Solvable and Integrable Systems · Physics 2007-05-23 Maria V. Demina , Nikolai A. Kudryashov

We study tori attached to the fundamental groups of plane curves with arbitrary singularities. These tori provide complete information about homology of finite abelian covers of the plane branched along the curve. We calculate these tori in…

Algebraic Geometry · Mathematics 2007-05-23 A. Libgober

The relation between the number of solutions of a nonlinear equation on a Riemannian manifold and the topology of the manifold itself is studied. The technique is based on Ljusternik-Schnirelmann category and Morse theory.

Analysis of PDEs · Mathematics 2007-07-09 Daniela Visetti

We describe some relations between the properties of the Cauchy problem for an ODE and the properties of the Cauchy problem for the associated continuity equation in the class of measures.

Dynamical Systems · Mathematics 2012-03-14 Patrick Bernard

In this paper we study the homeomorphic properties of the solutions to one dimensional backward doubly stochastic differential equations under suitable assumptions, where the terminal values depend on a real parameter. Then, we apply them…

Probability · Mathematics 2009-07-14 Auguste Aman

Differential equations for the special polynomials associated with the rational solutions of the second Painleve hierarchy are introduced. It is shown rational solutions of the Korteveg - de Vries hierarchy can be found taking the…

Exactly Solvable and Integrable Systems · Physics 2007-05-23 Nikolai A. Kudryashov

Hypergeometric solutions to seven q-Painlev\'e equations in Sakai's classification are constructed. Geometry of plane curves is used to reduce the q-Painlev\'e equations to the three-term recurrence relations for q-hypergeometric functions.

Exactly Solvable and Integrable Systems · Physics 2007-05-23 Kenji Kajiwara , Tetsu Masuda , Masatoshi Noumi , Yasuhiro Ohta , Yasuhiko Yamada

We study families of plane algebraic curves sharing the same set of foci. We reformulate confocality via a focal map on equiclassical families and analyze its fibers using deformation theory.

Algebraic Geometry · Mathematics 2026-05-19 Ragni Piene , Boris Shapiro

In this note, we consider rational cuspidal plane curves having exactly one cusp whose complements have logarithmic Kodaira dimension two. We classify such curves with the property that the strict transforms of them via the minimal embedded…

Algebraic Geometry · Mathematics 2009-09-15 Keita Tono

We describe the pole-free regions of the one-parameter family of special solutions of P$_\mathrm{II}$, the second Painlev\'e equation, constructed from the Airy functions. This is achieved by exploiting the connection between these…

Mathematical Physics · Physics 2024-03-08 Ahmad Barhoumi , Pavel Bleher , Alfredo Deaño , Maxim L. Yattselev