The Leo Apostel Center

invites everyone to the 52nd of its interdisciplinary seminars in the
Foundations series. In this series CLEA invites scholars that are
actively engaged in the research on the foundations of a particular
discipline. Their lectures will always be directed to an
interdisciplinary audience, and the discussions aim at confronting
the foundations of the different disciplines.



             On the geometry of the gravitational field
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                    Prof. Dr. Constantin Piron
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          Department of Theoretical Physics, 1211 Geneva 4.
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Monday, May 21, 2 pm, at the CLEA house, Krijgskundestraat 33,
1160 Brussels.

Abstract: In usual relativity everything must be derived from the
scalar product in space time. Taking this idea we discuss how the
Einstein gravitational theory can be implemented in geometry. Having
discussed the separation of space and time we introduce the Cartan
invariant tensors which generalize the Einstein energy momentum
tensor. The resulting free field equations impose the homogeneity of
this field. On the other hand, the gravitational field derived from
the Schwartzchild solution, which is not homogeneous, is nevertheless
conserved. We discuss the possibility of exchange of different kind of
energies like we have in Maxwell's theory.