Semester2 Numerics LUH

Semester2 Numerics LUH

Numerics  @  LUH  30 ECTS credits

The second semester will focus on Numerics and will be spent from April to August at the Leibniz University of Hannover (LUH)

Semester 2 description coming soon...

 

List of course units

  • Finite Elements for MathMods [5 credits]

    Finite Elements for MathMods

    • ECTS credits 5
    • University Leibniz University Hannover
    • Semester 2
    • Topics

       

      The aim of this course is to provide a rigorous introduction to the mathematical foundations of the finite element method for the numerical approximation of partial differential equations. Starting from model linear elliptic boundary value problems, we develop the variational (weak) formulation within an appropriate functional analytic framework, including Sobolev spaces and fundamental results on existence and uniqueness.
      The course introduces conforming finite element discretizations, with particular emphasis on the construction and characterization of finite elements and finite element spaces. Central topics include interpolation theory in Sobolev spaces, polynomial-preserving approximation operators, and their application to Lagrange and Hermite elements in multidimensional domains.
      Key concepts such as consistency and convergence are studied in detail, leading to Céa-type results and a priori error estimates. Additional topics include numerical integration within the finite element framework and general considerations on convergence.
      The presentation follows a mathematically rigorous approach inspired by the classical monograph of Ciarlet 1978. complemented by illustrative examples


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  • Numerical Methods for Nonlinear Equations [5 credits]

    Numerical Methods for Nonlinear Equations

    • ECTS credits 5
    • University Leibniz University Hannover
    • Semester 2
    • Topics

       

      In the class “Numerical Methods for Nonlinear Equations,” we discuss the treatment of nonlinear problems in general Banach spaces(finite and infinite dimensional). We examine convergence properties of general iterative methods and apply these principles to specific iterative methods, such as Newton's method.
      The course includes a thorough convergence analysis of Newton's method and explores various Newton-type methods. Typically, the iterative methods covered provide a single solution to a given problem. However, the deflation method can be employed to obtain multiple solutions.
      Additionally, for challenging but smooth nonlinear problems, continuation methods (homotopy methods) can be used to find solutions. These methods are also part of the lecture content.


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  • Numerical Methods for Continuum Mechanics [10 credits]

    Numerical Methods for Continuum Mechanics

    • ECTS credits 10
    • University Leibniz University Hannover
    • Semester 2
    • Topics

       

      The objective of the class is to give an introduction in numerical approximation methods for the basic equations in solid mechanics and fluid dynamics.
      The course contains aspects of mathematical modelling, existence and uniqueness results, numerical approximations methods and their convergence properties.
      The main part is devoted to the approximation methods in space and time, where modern discretization methods as finite element schemes with implicit time discretization methods and solvers for systems of linear and nonlinear equations are combined.
      The main difficulties for the discretizations of all parts of the underlying initial-boundary value problems are motivated by considering simpler examples.


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  • Mathematics of Artifical Intelligence and Machine Learning [5 credits]

    Mathematics of Artifical Intelligence and Machine Learning

    • ECTS credits 5
    • University Leibniz University Hannover
    • Semester 2
    • Topics

       

      This course is designed to provide an introduction to mathematical foundations, concepts, and constructs for artificial intelligence and machine learning algorithm design. A subset from the below exhaustive list of topics would be covered.
      Linear Algebra and Matrix Analysis:
      Systems of Linear Equations, Vector Spaces, Linear Independence, Basis & Rank, Orthonormal Basis, Orthogonal Complement, Orthogonal Projections, Rotations, Eigenvalue Decomposition & Diagonalization, Singular Value Decomposition, Matrix Approximation.
      Vector Calculus and Continuous Optimization:
      Gradients of Vector-Valued Functions, Gradients of Matrices, Automatic Differentiation, Higher-Order Derivatives, Linearization and Multivariate Taylor Series, Unconstrained Optimization, Constrained Optimization & Lagrange Multipliers.
      Probability and Distributions:
      Probability Space, Discrete and Continuous Probabilities, Sum Rule, Product Rule, & Bayes’ Theorem, Summary Statistics and Independence, Gaussian Distribution, Conjugacy and the Exponential Family, Change of Variables/Inverse Transform.
      Models and Data:
      Models Learning & Selection, Empirical Risk Minimization, Parameter Estimation, Probabilistic Modeling & Inference, Directed Graphical Models, Bayesian Linear Regression, Dimensionality Reduction with Principal Component Analysis, Density Estimation with Gaussian Mixture Models, Classification with Support Vector Machines.


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  • Space-Time Methods [5 credits]

    Space-Time Methods

    • ECTS credits 5
    • University Leibniz University Hannover
    • Semester 2
    • Topics

       

      The objective of this class is to give an introduction to the mathematical-numerical treatment of space-time formulations of differential equations. Space-time methods treat space and time together in a space-time domain (often called space-time cylinder), which allow us to treat the full problem with a common functional framework (solution sets, function spaces, and weak formulations), same basic discretization (e.g., Galerkin finite elements), joint numerical nonlinear and linear solution, common concepts for a priori and a posteriori error estimation, up to consistent adjoint derivations for gradient-based optimization and goal-oriented error control with the dual-weighted residual method. The focus is on numerical concepts, which are extensively derived with great care and from which most are rigorously proven. Many parts are complemented with numerical examples, figures and loving illustrations.


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