Qualitative Theory of Differential Equations
Keywords |
Classification |
Keyword |
OFICIAL |
Mathematics |
Instance: 2023/2024 - 1S 
Cycles of Study/Courses
Teaching language
Portuguese and english
Objectives
To motivate and introduce the theory and classical methods associated with the qualitative study of ordinary differential equations and stability theory.
Learning outcomes and competences
The student should know the basic results of the theory of stability (local and global) and be able to use the various tools of qualitative theory in order to deduce dynamic properties of a given differential system or vector field.
Working method
Presencial
Program
- Resolution of linear differential equations via exponential operator.
- Qualitative theory of linear differential equations associated with hyperbolic linear applications. Structural stability.
- Fundamental Theory of ODE: Existence and uniqueness of solutions; maximal domains maximum; solutions that flee from compact sets; flow associated to a differential equation; topological classification of solution curves.
- Gradient vector fields. Lyapunov functions.
- Dynamics in two dimension: transversal sections and Poincaré- Bendixson theorem.
-Hyperbolicity. Stability of equilibrium points. Hartman-Grobman theorem (without proof) - Stable Manifold Theorem (without proof).
- Homoclinic/Heteroclinic phenomena.
- Hartman-Grobman theorem for periodic orbits hyperbolic.
- RLC circuits and Van der Pol Equation.
Mandatory literature
J. Espinar, M. Viana; Differential equations: a dynamical systems approach to theory and practice, American Mathematical Society, Graduate Studies in Mathematics vol. 212, 2021.
Morris W. Hirsch;
Differential equations, dynamical systems, and introduction to chaos. ISBN: 0-12-349703-5
Morris W. Hirsch;
Differential equations, dynamical systems, and linear algebra. ISBN: 0-12-349550
Martin Braun;
Differential equations and their applications. ISBN: 0-387-90266-X
Teaching methods and learning activities
Theoretical lectures for introducing the concepts.
Exercise Sessions where student participation will be encouraged.
Evaluation Type
Distributed evaluation with final exam
Assessment Components
designation |
Weight (%) |
Exame |
70,00 |
Teste |
30,00 |
Total: |
100,00 |
Amount of time allocated to each course unit
designation |
Time (hours) |
Estudo autónomo |
171,00 |
Frequência das aulas |
72,00 |
Total: |
243,00 |
Eligibility for exams
The absence from lectures will not be taken into account.
Calculation formula of final grade
The final exam will correspond to 70% of the average while the test to be applied in the middle of the course will correspond to the remaining 30%.