PSU Mark
Eberly College of Science Mathematics Department

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<>August 2014
July 2014
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August 2014
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September 2014
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August 5th, 2014 (11:00am - 12:50pm)
Seminar: Ph.D. Thesis Defense
Title: "The auxiliary space technique for linear solvers"
Speaker: Lu Wang, Adviser: Jinchao Xu, Penn State
Location: MB106

Developing efficient iterative methods and parallel algorithms for solving sparse linear systems discretized partial differential equations (PDEs) is still a challenging tasks in scientific computing and practical applications. Though many mathematically optimal solvers such as the multigrid method have been developed, the unfortunate reality is that multigrid methods have not been much used in practical applications. Based on the methodology of Fast Auxiliary Space Preconditioning (FASP), we develop formulate and analyze preconditioning techniques that will narrow the gap between theory and practice, specifically by developing mathematically optimal solvers that are robust and easy to use in practice. A new parallel unsmoothed aggregation algebraic multigrid (UA-AMG) method for a PDE defined on an unstructured from the hierarchical structured coarse grid. It provides (nearly) optimal load balance and predictable communication patterns factors that make our new algorithm suitable for parallel computing. We will also try to extend the FASP techniques to saddle point and indefinite problems. Finally we present applications and show results from several application areas.

August 15th, 2014 (10:00am - 11:30am)
Seminar: Complex Fluids Seminar
Title: Cavity Computation in Nonlinear Elasticity
Speaker: Zhiping Li, Peking University
Location: MB106
Abstract: http://
August 26th, 2014 (03:30pm - 06:00pm)
Seminar: Working Seminar: Dynamics and its Working Tools
Title: An introduction to the use of algebraic geometry I ATTENTION: the second lecture in this series will take place on THURSDAY AUGUST 28 3:30-6pm n Teichmuller dynamics,I
Speaker: Alex Wright, Stanford University
Location: MB216