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Integral equations, spring 2015


Miren Zubeldia and Rodrigo Bleyer


5 + 5 sp.


Advanced studies


Familiarity with classical real analysis, basic linear algebra and rudiments of ordinary differential equation theory.


This course is divided into two parts:

Part one: This part will be an introduction to linear integral equations, that is, equations involving an unknown function which appears under an integral sign (and where the dependence on this function is linear). Such equations occur widely in diverse areas of applied mathematics and physiscs and they offer a powerful technique for solving a variety of practical problems. In particular, we will focus on their connection to partial differential equations and we will emphasize their fundamental role in initiating the development of functional analysis as the appropriate abstract framework for studying integral and also differential equations.

Table of contents will be as follows:

  • Volterra equations
  • Bounded and compact operators in a Hilbert space
  • Riesz theory for compact operators
  • Fredholm integral equations
  • Fredholm alternative and Fredholm operators
  • Spectral theory for linear compact self-adjoint operators

Part two: This part we will be an quick survey to numerical solution to linear integral equations of the second part, seen in the first part. The main topics will be studied individually and presented to the entire group as a seminar.

Table of contents will be as follows:

  • Quadrature methods (Nyström)
  • Projection methods (Collocation and Galerkin)
  • Iteration methods (two-grid and multi-grid)
  • Boundary integral equation and finite element methods (FEM)


Part one: Weeks 3-9, Tuesday 10-12 and Thursday 10-12 in room B322. In addition, there will be 2 hours of exercises every week.

Part two: Tuesday 10-12 and Thursday 10-12 in room B322; Wednesday 14-16 in room C122

  • Weeks 10 - 11 Reading material 
  • Week 12 Individual meeting
  • Weeks 13 - 16 Development of seminar and numerical implementation
  • Weeks 17 - 18 Seminar presentation

Easter Holiday 2.-8.4.


Lecture Notes: integral_equations_notes.pdf


Part one: Feb 25, 2015 (Wednesday 14-16 room C122)

Part two: Seminar presentation and report.


Part one:

  • R. Kress. Linear Integral Equations, Applied Mathematical Sciences, Volume 82, Springer-Verlag, 1989.
  • K. Yosida. Lectures on Differential and Integral Equations, Dover Publications, INC., New York, 1991.
  • D. Porter, D.S.G. Stirling. Integral equations a practical treatment, from spectral theory to applications, Cambridge Texts in Applied Mathematics, 1990.

Part two:

  • Kendall E. Atkinson. The numerical solution of integral equations of the second kind, Cambridge University Press, 2009.


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1. Wednesday 14-16C122 Rodrigo Bleyer

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