3 papers
math.MG2026
Minkowski Tensors of Planar Anisotropic Voronoi Diagrams
Nicolas Venkovic, Hartwig Anzt
Anisotropic Voronoi diagrams, in which each cell is the region first reached by an ellipse growing from its site, generate non-convex cells whose integral geometry can be described…
math.NA2025
Global iterative methods for sparse approximate inverses of symmetric positive definite matrices
Nicolas Venkovic, Hartwig Anzt
This work is motivated by symmetric positive definite (SPD) matrices for which the best sparse approximate inverse (SPAI) with the prescribed nonzero pattern of for some mode…
math.NA2025
Permutation-Avoiding FFT-Based Convolution
Nicolas Venkovic, Hartwig Anzt
Fast Fourier Transform (FFT) libraries are widely used for evaluating discrete convolutions. Most FFT implementations follow some variant of the Cooley-Tukey framework, in which th…