[HTML][HTML] Desingularization in the q-Weyl algebra

C Koutschan, Y Zhang - Advances in Applied Mathematics, 2018 - Elsevier
In this paper, we study the desingularization problem in the first q-Weyl algebra. We give an
order bound for desingularized operators, and thus derive an algorithm for computing …

[HTML][HTML] Removing apparent singularities of linear difference systems

MA Barkatou, M Jaroschek - Journal of Symbolic Computation, 2021 - Elsevier
It is well known that for a first order system of linear difference equations with rational
function coefficients, a solution that is holomorphic in some left half plane can be analytically …

Calabi-Yau Feynman integrals in gravity: -factorized form for apparent singularities

H Frellesvig, R Morales, S Pögel, S Weinzierl… - arXiv preprint arXiv …, 2024 - arxiv.org
We study a recently identified four-loop Feynman integral that contains a three-dimensional
Calabi-Yau geometry and contributes to the scattering of black holes in classical gravity at …

Computation of the expected Euler characteristic for the largest eigenvalue of a real non-central Wishart matrix

N Takayama, L Jiu, S Kuriki, Y Zhang - Journal of Multivariate Analysis, 2020 - Elsevier
We give an approximate formula for the distribution of the largest eigenvalue of real Wishart
matrices by the expected Euler characteristic method for general dimension. The formula is …

Simple differentially definable functions

A Jiménez-Pastor - Proceedings of the 2021 on International Symposium …, 2021 - dl.acm.org
D-finite functions satisfy linear differential equations with polynomial coefficients. The
solutions to this type of equations may have singularities determined by the zeros of their …

Resolving singularities and monodromy reduction of Fuchsian connections

YM Chiang, A Ching, CY Tsang - Annales Henri Poincaré, 2021 - Springer
We study monodromy reduction of Fuchsian connections from a sheave theoretic viewpoint,
focusing on the case when a singularity of a special connection with four singularities has …

Order-Degree-Height Surfaces for Linear Operators

H Huang, M Kauers, G Mukherjee - Proceedings of the 2022 …, 2022 - dl.acm.org
It is known for linear operators with polynomial coefficients annihilating a given D-finite
function that there is a trade-off between order and degree. Raising the order may give room …

Системы ОДУ первого порядка, порождающие конфлюэнтные уравнения Гойна

АА Салатич, СЮ Славянов, ОЛ Стесик - Записки научных семинаров …, 2019 - mathnet.ru
В статьях СЮ Славянова и соавторов была разработана процедура, позволяющая
генерировать нелинейные интегрируемые уравнения Пенлеве из линейных …

Telescopers for differential forms with one parameter

S Chen, R Feng, Z Li, MF Singer, SM Watt - Selecta Mathematica, 2024 - Springer
Telescopers for a function are linear differential (resp. difference) operators annihilating the
definite integral (resp. definite sum) of this function. They play a key role in Wilf–Zeilberger …

Rational solutions of high-order algebraic ordinary differential equations

TN Vo, Y Zhang - Journal of Systems Science and Complexity, 2020 - Springer
This paper considers algebraic ordinary differential equations (AODEs) and study their
polynomial and rational solutions. The authors first prove a sufficient condition for the …