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math.DG2009★ 1 cited
Intrinsic characteristic classes for a local Lie group
Ender Abadoglu, Ercument Ortacgil
For a local Lie group M we define odd order cohomology classes. The first class is an obstruction to globalizability of the local Lie group. The third class coincides with Godbillo…
math.DG2007
Klein geometries and stable nonlinear Spencer sequence
Ender Abadoglu, Ercument Ortacgil
This paper has been withdrawn by the authors
math.DG2007★ 2 cited
Klein geometries, parabolic geometries and differential equations of finite type
Ender Abadoglu, Ercument Ortacgil
We define the infinitesimal and geometric orders of an effective Klein geometry G/H. Using these concepts, we prove i) For any integer m>1, there exists an effective Klein geometry…