Publicaties
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Asymptotic zero distribution of complex orthogonal polynomials associated with Gaussian quadrature KU Leuven
Exponential sums: questions by denef, sperber, and igusa KU Leuven
We prove the remaining part of the conjecture by Denef and Sperber [Denef, J. and Sperber, S., Exponential sums mod p(n) and Newton poly-hedra, Bull. Belg. Math. Soc., suppl. (2001) 55-63] on nondegenerate local exponential sums modulo pm. We generalize Igusa's conjecture in the introduction of [Igusa, J., Lectures on forms of higher degree, Lect. Math. Phys., Springer-Verlag, 59 (1978)] from the homogeneous to the quasi-homogeneous case and ...
On the Weyl curvature of Deszcz KU Leuven
Geometrical characterizations are given for the (0, 6)-tensor R . C and the (0, 6) Tachibana-Weyl tensor Q(g, C) := -Lambda(g) .C, whereby C denotes the (0, 4) Weyl conformal curvature tensor of a Riemannian manifold (M, g), R denotes the curvature operator acting on C as a derivation, and where the natural metrical endomorphism Lambda(g) also acts as a derivation on C. By comparison of these (0, 6)-tensors R . C and Q(g, C), a new scalar valued ...
Ranking - use and usability KU Leuven
Ranking has recently attracted much attention, conceptually as well as algorithmically and in its uses in major Internet search engines. A core goal of ranking and related techniques on the Web is to help people find what they are looking for - and (depending on the application) to suggest to them things that they didn't know they were looking for, but might still find interesting. Any evaluation of these techniques should therefore consider ...