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15 results on '"Gragert, P.K.H."'

2. Solutions of WDVV Equations in Seiberg-Witten Theory from Root

Author

Martini, Ruud and Gragert, P.K.H.

Subjects
IR-70353, Mathematics::Algebraic Geometry, Mathematics::Symplectic Geometry, METIS-140618
Abstract

We present a complete proof that solutions of the WDVV equations in Seiberg-Witten theory may be constructed from root systems. A generalization to weight systems is proposed.

Published
1999

4. Symmetries and Conservation laws of the system Ux=VWx, Vy=UWy, UV+Wxx+Wyy=0

Author

van Bemmelen, T., Gragert, P.K.H., and Kersten, P.H.M.

Subjects
METIS-140577, IR-69576
Abstract

After a short exposition of the theory of local and nonlocal symmetries and conservation laws for systems of PDE’s, results on these and the recursion operator are listed for the system of PDE’s $u_x = vw_x, v_y = uw_y, uv + w_{xx} + w_{yy} = 0$. In between the methods of computation are explained.

Published
1997

8. The programming and proof system AIES

Author

Pucetti, A., Brocard, D., Gragert, P.K.H., Gribomont, G., Pirotte, O., Raguideau, J., Remouchamps, A., and ten Cate, Eric

Subjects
METIS-141064
Published
1991

11. Symmetries for the super-KdV equation: letter to the editor

Author

Kersten, P.H.M., Gragert, P.K.H., and University of Twente

Subjects
IR-60643
Abstract

Symmetries and higher-order or generalised symmetries for the SKdV equation are constructed. Moreover by the introduction of graded potentials a non-local generalised symmetry is obtained, leading to the recursion operator for symmetries in a straightforward way, without making use of the bi-Hamiltonian structure.

Published
1988

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