Results 31 to 40 of about 40,321 (314)

Lagrangian topology and enumerative geometry [PDF]

Geometry & Topology, 2012
We use the "pearl" machinery in our previous work to study certain enumerative invariants associated to monotone Lagrangian submanifolds.
Biran, Paul, Cornea, Octav
openaire   +4 more sources

On Canonical Almost Geodesic Mappings of Type π₂(e)

Mathematics, 2020
In the paper, we consider canonical almost geodesic mappings of type π 2 ( e ) . We have found the conditions that must be satisfied for the mappings to preserve the Riemann tensor.
Volodymyr Berezovski, Josef Mikeš, Lenka Rýparová, Almazbek Sabykanov   +3 more
doaj   +1 more source

Large Sets in Boolean and Non-Boolean Groups and Topology

Axioms, 2017
Various notions of large sets in groups, including the classical notions of thick, syndetic, and piecewise syndetic sets and the new notion of vast sets in groups, are studied with emphasis on the interplay between such sets in Boolean groups.
Ol’ga V. Sipacheva
doaj   +1 more source

Free Boolean Topological Groups

Axioms, 2015
Known and new results on free Boolean topological groups are collected. An account of the properties that these groups share with free or free Abelian topological groups and properties specific to free Boolean groups is given.
Ol’ga Sipacheva
doaj   +1 more source

EFFICIENT SPATIO-TEMPORAL MODELLING TO ENABLE TOPOLOGICAL ANALYSIS [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
Time-dependent analysis scenarios such as heat, wind or flood analysis in cities and in landscapes need a correct and consistent modelling of geometry and topology over time.
M. W. Jahn, P. Kuper, M. Breunig
doaj   +1 more source

Tilings in topological spaces

International Journal of Mathematics and Mathematical Sciences, 1999
A tiling of a topological space X is a covering of X by sets (called tiles) which are the closures of their pairwise-disjoint interiors. Tilings of ℝ2 have received considerable attention (see [2] for a wealth of interesting examples and results as well ...
F. G. Arenas
doaj   +1 more source

Scalar linear impulsive Riemann-Liouville fractional differential equations with constant delay-explicit solutions and finite time stability

Demonstratio Mathematica, 2020
Riemann-Liouville fractional differential equations with a constant delay and impulses are studied in this article. The following two cases are considered: the case when the lower limit of the fractional derivative is fixed on the whole interval of ...
Hristova Snezhana G., Tersian Stepan A.
doaj   +1 more source

Exact solutions and superposition rules for Hamiltonian systems generalizing time-dependent SIS epidemic models with stochastic fluctuations

AIMS Mathematics, 2023
Using the theory of Lie-Hamilton systems, formal generalized time-dependent Hamiltonian systems that extend a recently proposed SIS epidemic model with a variable infection rate are considered.
Rutwig Campoamor-Stursberg, Eduardo Fernández-Saiz, Francisco J. Herranz   +2 more
doaj   +1 more source

Inequalities for the Casorati Curvature of Totally Real Spacelike Submanifolds in Statistical Manifolds of Type Para-Kähler Space Forms

Entropy, 2021
The purpose of this article is to establish some inequalities concerning the normalized δ-Casorati curvatures (extrinsic invariants) and the scalar curvature (intrinsic invariant) of totally real spacelike submanifolds in statistical manifolds of the ...
Bang-Yen Chen, Simona Decu, Gabriel-Eduard Vîlcu   +2 more
doaj   +1 more source

Synchronization of Caputo fractional neural networks with bounded time variable delays

Open Mathematics, 2021
One of the main problems connected with neural networks is synchronization. We examine a model of a neural network with time-varying delay and also the case when the connection weights (the influential strength of the jjth neuron to the iith neuron) are ...
Almeida Ricardo, Hristova Snezhana, Tersian Stepan   +2 more
doaj   +1 more source