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Seminer Posteri ektedir.<br>
<br>
Saygilarimla,<br>
<br>
Kursat Aker<br>
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TUBITAK Feza Gursey Enstitusu <br>
January 19 (Tuesday), 2010 - 14:00 <br>
<b>Graham S. Hall</b> (Institute of Mathematics, University of
Aberdeen) <br>
<b>Projective Structure in Differential Geometry and Physics</b> <br>
<br>
<b>Abstract:</b> This talk asks the following question. Suppose M is a
manifold and
g and g' are Lorentz metrics on M with Levi-Civita connections D and
D', respectively. Suppose that the unparametrised geodesic paths on M
for D and D' are the same. How are g and g' (and D and D') related?
[By an "unparametrised" geodesic path is meant the actual geodesic
path in M, ignoring the parameter of the path.]<br>
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This talk is of interest as a mathematical question in pure
differential geometry and also in general relativity theory because of
the Newton-Einstein principle of equivalence. The idea is to show that
for many situations, D and D' are tightly related as also are g and g'
and in many cases, the "best possible" result, D=D', follows.<br>
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The plan of the talk is to discuss, firstly, some general
techniques for approaching this problem and second, to introduce
holonomy theory as a convenient and powerful tool for solving it. In
many cases holonomy theory can resolve the problem for the
relationship between g and g' if D=D'.
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