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Preprint
Exact algorithms for p-adic fields and epsilon constant conjectures
(2006)
We develop several algorithms for computations in Galois extensions of p-adic fields. Our algorithms are based on existing algorithms for number fields and are exact in the sense that we do not need to consider approximations to p-adic numbers. As an application we describe an algorithmic approach to prove or disprove various conjectures for local and global epsilon constants.
Preprint
An algebraic proof of Iitaka's conjecture C2,1
(Universität Kassel, FB 17, Mathematik/Informatik, 2002)
We give a proof of Iitaka's conjecture C2,1 using only elementary methods from algebraic geometry.
Dissertation
On Vessiot's Theory of Partial Differential Equations
(2008-02-13)
The object of research presented here is Vessiot's theory of partial differential equations: for a given differential equation one constructs a distribution both tangential to the differential equation and contained within the contact distribution of the jet bundle. Then within it, one seeks n-dimensional subdistributions which are transversal to the base manifold, the integral distributions. These consist of integral elements, and these again shall be adapted so that they make a subdistribution which closes under ...