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 Cursus: 202001354
 202001354Ordinary Differential Equations
 Cursus informatie
Cursus202001354
Studiepunten (ECTS)4
CursustypeOnderwijseenheid
VoertaalEngels
Contactpersoondr. H.G.E. Meijer
E-mailh.g.e.meijer@utwente.nl
Docenten
 Vorige 1-5 van 76-7 van 7 Volgende 2
 Docent prof.dr. C. Brune Docent M. Carioni Examinator prof.dr.ir. B.J. Geurts Docent prof.dr.ir. B.J. Geurts Docent dr. H.G.E. Meijer
Collegejaar2023
Aanvangsblok
 1B
OpmerkingOnly for repeat students who need to retake the exam. Part of module 6 AM
AanmeldingsprocedureZelf aanmelden via OSIRIS Student
Inschrijven via OSIRISJa
 Cursusdoelen
 body { font-size: 9pt; font-family: Arial } table { font-size: 9pt; font-family: Arial } This study unit is only on offer for repeat students from previous academic years who need to retake the exam. After following this course the student: is able to check if a solution of an ordinary differential equation (ODE) exists, and whether it is unique; can solve ODEs analytically using separation of variables, integrating factors or variation of constants; is able to compute matrix-exponentials to solve linear inhomogeneous first order systems; can determine equilibria and analyse their stability using linearisation or Lyapunov functions; is able to classify solutions for planar systems using nullclines, polar coordinates, conserved quantities and the theorem of PoincarĂ©-Bendixson.
 Inhoud
 body { font-size: 9pt; font-family: Arial } table { font-size: 9pt; font-family: Arial } In this course we study systems of ordinary differential equations (ODEs) in two or more dimensions. Such equations appear in many fields. Physical systems from classical mechanics range from the sling, coupled pendula to masses moving in a potential field. Models from biology range from prey-predator systems, food webs, to infectious diseases and neuronal oscillators. The focus of this course is on finding solutions analytically where possible, and else to characterize their long-term behavior using geometric methods. After exploratory simulations, a typical problem would be to show that a model has a periodic orbit, or to determine which initial values approach a certain steady state. Throughout the course, applications serve as motivating examples. A differential equation is a relation of a function and its derivatives. Normally an equation yields a (numerical) value as answer, but here we search for a function. We first recall solution methods for ordinary differential equations depending on a single variable, e.g. time, including separation of variables and variation of constants. We then prove the existence and uniqueness of solutions for a large class of equations. We then generalize these methods using the matrix exponential to cover n-dimensional linear inhomogeneous systems, and discuss stability. In the last part, we treat nonlinear systems of ODEs that can exhibit oscillatory and even chaotic dynamics. As the nonlinearities typically prohibit deriving explicit solutions, we characterize their long-term behaviour with other (geometric) methods such as polar coordinates, conserved quantities or Lyapunov functions. Using linearization we classify equilibria and their stability. In particular, we study two-dimensional systems using nullclines and the limiting behaviour of solutions using the PoincarĂ©-Bendixson Theorem or Lasalle's Invariance Theorem.
Voorkennis
 Knowledge of calculus and linear algebra, in particular eigenvalues and eigenvectors. For non-AM students, the mathematics learning line suffices.
 Participating study
 Bachelor Applied Mathematics
Verplicht materiaal
Book
 “Differential Equations with Boundary Value Problems” by JC Polking. ISBN: 9781292039152. (The old hardcover book (ISBN 9780134689500) can also be used, but is available only second-hand)
Aanbevolen materiaal
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Werkvormen
Self study without assistance
 Aanwezigheidsplicht Ja

Toetsen
 Test ODE Challenges
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