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Structure-preserving finite elements and the convergence of augmented Lagrangian methods
Abstract
Problems with physical constraints, such as the incompressibility constraint for mass conservation in fluids or Gauss's laws for electric and magnetic fields, result in generalized saddle point systems. So-called structure-preserving finite elements respect the constraints pointwise, resulting in more physically accurate solutions that are typically robust with respect to some problem parameters. However, constructing these finite elements may involve complicated spaces for the Lagrange multiplier variables. Augmented Lagrangian methods (ALMs) provide one process to compute the solution without the need for an explicit basis for the Lagrange multiplier space. In this talk, we present new convergence estimates for a standard ALM method, sometimes called the iterated penalty method, applied to structure-preserving discretizations of linear saddle point systems.
We are making a series of films about maths in different langugaes and need an Arabic speaker. All it requires is translating a few mathematical terms and saying a few things about learning maths in a language other than English.
However, whatever your first language (ex English) we'd like to hear from you. If you want to take part, please email @email
Space, time and Shakespeare - Paul Glendinning
Wednesday 06 May 2026, 5.00-6.00 pm, L1
Shakespeare’s work provides a snapshot of how people made sense of the world around them: how they solved problems (how large is an opposing army?) and how they navigated a complex environment (does the sun rise in the east?).
Space, time and Shakespeare - Paul Glendinning