There will be
                  NO DIFFERENTIAL GEOMETRY/PDE SEMINAR
                          next Monday, May 13

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                             Next seminar:

                             Monday, May 20

                             Padelford C401
                                3:45 PM


            ON DETERMINING OBSTACLES INSIDE INHOMOGENEITIES


                            Lassi Paivarinta
                     (University of Oulu, Finland)


Sylvester and Uhlmann were the first to prove that the spatially varying
conductivity of a body can be uniquely determined from electrostatic
boundary measurements.  If the body contains a perfectly conducting
obstacle one may ask whether voltage-current measurements carry enough
information to determine both the perfect conductor and the background
conductivity function.  We discus this still open problem and give some
partial answers.  This is a joint study with A. Kirsch of Karlsruhe,
Germany.


For more information about this seminar, visit the Differential Geometry
Seminar World-Wide Web page at

    https://www.math.washington.edu/~lee/Seminars/dg.html


To request disability accommodations, contact the Office of the ADA
Coordinator as soon as possible: 543-6450 (voice); 543-6452 (TDD);
685-3885 (FAX); access@u.washington.edu (E-mail).