Fixed points (mathematics) | Topological dynamics | Differential topology

Conley index theory

In dynamical systems theory, Conley index theory, named after Charles Conley, analyzes topological structure of invariant sets of diffeomorphisms and of smooth flows. It is a far-reaching generalization of the Hopf index theorem that predicts existence of fixed points of a flow inside a planar region in terms of information about its behavior on the boundary. Conley's theory is related to Morse theory, which describes the topological structure of a closed manifold by means of a nondegenerate gradient vector field. It has an enormous range of applications to the study of dynamics, including existence of periodic orbits in Hamiltonian systems and travelling wave solutions for partial differential equations, structure of global attractors for reaction–diffusion equations and delay differential equations, proof of chaotic behavior in dynamical systems, and bifurcation theory. Conley index theory formed the basis for development of Floer homology. (Wikipedia).

Video thumbnail

Concavity and Parametric Equations Example

Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Concavity and Parametric Equations Example. We find the open t-intervals on which the graph of the parametric equations is concave upward and concave downward.

From playlist Calculus

Video thumbnail

11_6_1 Contours and Tangents to Contours Part 1

A contour is simply the intersection of the curve of a function and a plane or hyperplane at a specific level. The gradient of the original function is a vector perpendicular to the tangent of the contour at a point on the contour.

From playlist Advanced Calculus / Multivariable Calculus

Video thumbnail

Michał Lipiński 7/20/20: Conley-Morse-Forman theory for generalized combinatorial multivector fields

Title: Conley-Morse-Forman theory for generalized combinatorial multivector fields on finite topological spaces Abstract: The combinatorial approach to dynamics has its origins in the Forman's (1998) concept of a combinatorial vector field. The original motivation of Forman was the presen

From playlist ATMCS/AATRN 2020

Video thumbnail

Recent progress in multiplicative number theory – Kaisa Matomäki & Maksym Radziwiłł – ICM2018

Number Theory Invited Lecture 3.5 Recent progress in multiplicative number theory Kaisa Matomäki & Maksym Radziwiłł Abstract: Multiplicative number theory aims to understand the ways in which integers factorize, and the distribution of integers with special multiplicative properties (suc

From playlist Number Theory

Video thumbnail

Math 139 Fourier Analysis Lecture 05: Convolutions and Approximation of the Identity

Convolutions and Good Kernels. Definition of convolution. Convolution with the n-th Dirichlet kernel yields the n-th partial sum of the Fourier series. Basic properties of convolution; continuity of the convolution of integrable functions.

From playlist Course 8: Fourier Analysis

Video thumbnail

Konstantin Mischaikow (8/28/21): Solving systems of ODEs via combinatorial homological algebra

Using the simplest possible nontrivial model system (2-dimensional with continuous piecewise linear nonlinearities, but a high dimensional parameter space) and as many pictures as possible I will outline how one can efficiently compute a homological representation of dynamics and then demo

From playlist Beyond TDA - Persistent functions and its applications in data sciences, 2021

Video thumbnail

Konstantin Mischaikow (1/27/21): Nonlinear Dynamics in an Age of Heuristic Science

Title: Nonlinear Dynamics in an Age of Heuristic Science Abstract: Motivated by problems in systems and synthetic biology (but I believe the problems are common to multiscale systems and data driven science) I will argue the need for a new framework in which to discuss nonlinear dynamics

From playlist AATRN 2021

Video thumbnail

Marian Mrozek (8/30/21): Combinatorial vs. Classical Dynamics: Recurrence

The study of combinatorial dynamical systems goes back to the seminal 1998 papers by Robin Forman. The main motivation to study combinatorial dynamics comes from data science. Combinatorial dynamics also provides very concise models of dynamical phenomena. Moreover, some topological invari

From playlist Beyond TDA - Persistent functions and its applications in data sciences, 2021

Video thumbnail

Number theory Full Course [A to Z]

Number theory (or arithmetic or higher arithmetic in older usage) is a branch of pure #mathematics devoted primarily to the study of the integers and integer-valued functions. Number theorists study prime numbers as well as the properties of objects made out of integers (for example, ratio

From playlist Number Theory

Video thumbnail

Cylindrical contact homology as a well-defined homology? - Joanna Nelson

Joanna Nelson Institute for Advanced Study; Member, School of Mathematics February 7, 2014 In this talk I will explain how the heuristic arguments sketched in literature since 1999 fail to define a homology theory. These issues will be made clear with concrete examples and we will explore

From playlist Mathematics

Video thumbnail

Equivariant and nonequivariant contact homology - Jo Nelson

Symplectic Dynamics/Geometry Seminar Topic: Equivariant and nonequivariant contact homology Speaker: Jo Nelson Affiliation: Rice University Date: March 20, 2019 For more video please visit http://video.ias.edu

From playlist Mathematics

Video thumbnail

Visual Group Theory, Lecture 3.7: Conjugacy classes

Visual Group Theory, Lecture 3.7: Conjugacy classes We were first introduced to the concept of conjugacy when studying normal subgroups: H is normal if every conjugate of H is equal to H. Alternatively, we can fix an element x of G, and ask: "which elements can be written as conjugates o

From playlist Visual Group Theory

Video thumbnail

Cylindrical contact homology in dimension 3 via intersection theory and more - Joanna Nelson

Joanna Nelson Member, School of Mathematics October 1, 2014 More videos on http://video.ias.edu

From playlist Mathematics

Video thumbnail

Volume in Seiberg-Witten theory and the existence of two Reeb orbits - Daniel Cristofaro-Gardiner

Daniel Cristofaro-Gardiner University of California, Berkeley; Member, School of Mathematics November 1, 2013 I will discuss recent joint work with Vinicius Gripp and Michael Hutchings relating the volume of any contact three-manifold to the length of certain finite sets of Reeb orbits. I

From playlist Mathematics

Video thumbnail

Category Theory and Robotics - Paul Gustafson

A discussion with Paul Gustafson on how to apply Category Theory to Robotics. Tasks can be composed either sequentiall or in parallel and up until now there has been no formalism to describe how this happens. The only prerequisite for this talk is curiosity around robotics or category th

From playlist Interviews

Video thumbnail

10/18/18 Konstantin Mischaikow

A Combinatorial/Algebraic Topological Approach to Nonlinear Dynamics

From playlist Fall 2018 Symbolic-Numeric Computing

Video thumbnail

11_6_3 Contours and Tangents to Contrours Part 3

Using the gradient as a perpendicular vector to the tangent of a contour of a function's graph to calculate an equation for a tangent (hyper)plane to the function.

From playlist Advanced Calculus / Multivariable Calculus

Related pages

Bifurcation theory | Attractor | Manifold | Delay differential equation | Hamiltonian system | Morse theory | Flow (mathematics) | Isolating neighborhood | Diffeomorphism | Floer homology | Partial differential equation | N-sphere | Dynamical systems theory