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Infarction- or ischaemia-induced cardiac fibrosis can be arrythmogenic. We use mathematcal models for diffuse fibrosis ($\mathcal{DF}$), interstitial fibrosis ($\mathcal{IF}$), patchy fibrosis ($\mathcal{PF}$), and compact fibrosis…

Biological Physics · Physics 2021-05-04 Mahesh Kumar Mulimani , Brodie A. J. Lawson , Rahul Pandit

For a category B with finite products, we first characterize pseudofunctors from B to Cat whose corresponding opfibration is cartesian monoidal. Among those, we then characterize the ones which extend to pseudofunctors from internal groups…

Category Theory · Mathematics 2022-06-03 Alan S. Cigoli , Sandra Mantovani , Giuseppe Metere

This paper defines double fibrations (fibrations of double categories) and describes their key examples and properties. In particular, it shows how double fibrations relate to existing fibrational notions such as monoidal fibrations and…

Category Theory · Mathematics 2022-05-31 Geoffrey Cruttwell , Michael Lambert , Dorette Pronk , Martin Szyld

The top of the attractor $A$ of a hyperbolic iterated function system $\left\{ f_{i}:\mathbb{R}^{n}\rightarrow\mathbb{R}^{n}|i=1,2,\dots,M\right\} $ is defined and used to extend self-similar tilings to overlapping systems. The theory…

Dynamical Systems · Mathematics 2026-03-24 Michael F. Barnsley , Corey de Wit

We study biorthogonal functions related to basic hypergeometric integrals with coupled continuous and discrete components. Such integrals appear as superconformal indices for three-dimensional quantum field theories and also in the context…

Classical Analysis and ODEs · Mathematics 2016-12-16 Hjalmar Rosengren

The aim of this paper is to give, using some contiguous relations, the asymptotic behaviour of some linear combination of two symmetric contiguous hypergeometric functions, under some conditions of their parameters.

Classical Analysis and ODEs · Mathematics 2017-07-26 Imane Ghanimi

We develop new tools to compute the index of symmetry in the context of homogeneous fibrations. As a consequence of our results, we determine the index of symmetry of every homogeneous space diffeomorphic to a compact rank-one symmetric…

Differential Geometry · Mathematics 2026-05-28 Ángel Cidre-Díaz , Carlos E. Olmos , Alberto Rodríguez-Vázquez

We describe the parametric behavior of the series solutions of an A-hypergeometric system. More precisely, we construct explicit stratifications of the parameter space such that, on each stratum, the series solutions of the system are…

Algebraic Geometry · Mathematics 2016-05-24 Christine Berkesch Zamaere , Jens Forsgård , Laura Felicia Matusevich

To various kinds of quadratic functors, homotopy types of two stage spaces are assigned. It is investigated what kind of homotopy types are obtainable in this way.

Algebraic Topology · Mathematics 2007-05-23 H. -J. Baues , T. Pirashvili

Functional dynamics, introduced in a previous paper, is analyzed, focusing on the formation of a hierarchical rule to determine the dynamics of the functional value. To study the periodic (or non-fixed) solution, the functional dynamics is…

adap-org · Physics 2007-05-23 N. Kataoka , K. Kaneko

Starting with an O(2)-principal fibration over a closed oriented surface F_g, g>=1, a 2-fold covering of the total space is said to be special when the monodromy sends the fiber SO(2) = S^1 to the nontrivial element of Z_2. Adapting D…

Algebraic Topology · Mathematics 2009-04-08 Anne Bauval , Daciberg L Goncalves , Claude Hayat , Maria Herminia de Paula Leite Mello

We study harmonic almost contact structures in the context of contact metric manifolds, and an analysis is carried out when such a manifold fibres over an almost Hermitian manifold, as exemplified by the Boothby-Wang fibration. Two types of…

Differential Geometry · Mathematics 2007-09-03 E. Vergara-Diaz , C. M. Wood

We show that the cyclotomic trace map for smooth varieties over number rings can be interpreted as a regulator map and hence are related to special values of $\zeta$-functions.

K-Theory and Homology · Mathematics 2007-05-23 Thomas H. Geisser

Based on recent advances in fibration symmetry theory, we investigate how structural symmetries influence synchronization in systems with higher-order interactions (HOI). Using bipartite graph representations, we identify a node partition…

Dynamical Systems · Mathematics 2026-01-12 Margherita Bertè , Tommaso Gili

We study nonlinear resolvents of holomorphic generators of one-parameter semigroups acting in the open unit disk. The class of nonlinear resolvents can be studied in the framework of geometric function theory because it consists of…

Complex Variables · Mathematics 2022-07-26 Mark Elin , Fiana Jacobzon

This paper deals with fractional-order controllers. We outline mathematical description of fractional controllers and methods of their synthesis and application. Synthesis method is a modified root locus method for fractional-order systems…

Optimization and Control · Mathematics 2007-05-23 I. Petras

We provide some examples of harmonic unit vector fields as normalized gradients of isoparametric functions from a K-contact geometry setting.

Differential Geometry · Mathematics 2013-09-17 Philippe Rukimbira

We show that word-hyperbolic groups satisfy linear isoperimetric functions for all homotopy types of surface diagrams. This generalises the linear isoperimetric functions for disc and annular diagrams.

Geometric Topology · Mathematics 2022-05-23 Macarena Arenas , Daniel T. Wise

The hypergeometric type operators are shape invariant, and a factorization into a product of first order differential operators can be explicitly described in the general case. Some additional shape invariant operators depending on several…

Mathematical Physics · Physics 2009-02-24 Nicolae Cotfas

This work is devoted to new constructions of symplectically fat fiber bundles. The latter are constructed in two ways: using the Kirwan map and expressing the fatness condition in terms of the isotropy representation related to the…

Differential Geometry · Mathematics 2015-09-15 Maciej Bochenski , Anna Szczepkowska , Aleksy Tralle , Artur Woike