Third-Cycle Courses

Faculty of Engineering | Lund University

Details for the Course Syllabus for Course FMA305F valid from Autumn 2018

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  • English
  • If sufficient demand
  • To give a postgraduate student in, e.g., complex analysis, harmonic analysis and partial differential equations good knowledge about a number of basic concepts and tools in modern analysis.
  • Harmonic functions of two variables: Harmonic and holomorphic functions, the Dirichlet problem on the disc, positive harmonic functions.

    Subharmonic functions: Upper semicontinuous functions, subharmonic functions, the maximum principle, criteria for subharmoniciy, integrability, convexity, smoothing.

    Potential theory: Potentials, polar sets, equilibrium measures, upper semicontinuous regularization, minus-infinity sets, removable singularities, the generalized Laplacian, thinness.

    The Dirichlet problem: Solution of the Dirichlet problem, criteria for regularity, harmonic measure, Green's functions, the Poisson-Jensens formula.

    Capacity: Capacity as a set function, computation of capacity, estimation of capacity, criteria for thinness, transfinite diameter.
Knowledge and Understanding
  • For a passing grade the doctoral student must
  • be able to state some of the most important properties of harmonic functions of two variables.

    be able to account for the basic theory for subharmonic functions.

    be able to explain the following concepts from the theory of potentials: potential, polar set, equilibrium measure, upper semicontinuous regularization, weak form of the Poisson equation.

    be able to account for the following concepts from the theory for the Dirichlet problem in the plane: Perron function, barrier, regular boundary point, harmonic measure, Green's function, the Poisson-Jensen formula.

    be able to give the definition of the capacity of a set, be able to evaluate it in simple cases, and to estimate it in more general cases.

    be able to describe applications of potential theory to other mathematical fields, e.g. functional analysis, approximation theory, complex analysis or complex dynamics.
Competences and Skills
  • For a passing grade the doctoral student must
Judgement and Approach
  • For a passing grade the doctoral student must
Types of Instruction
  • Lectures
Examination Formats
  • Seminars given by participants
  • Failed, pass
Admission Requirements
Assumed Prior Knowledge
  • Analytic functions and basic measure theory.
Selection Criteria
  • Ransford, T.: Potential Theory in the Complex Plane. Cambridge University Press, 1995. ISBN 9780521466547.
Further Information
  • Contacts: Jacob Stordal Christiansen ( and Frank Wikström ( .
Course code
  • FMA305F
Administrative Information
  •  -11-15
  • Professor Thomas Johansson

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