3 citations · 4 across the 5 of their papers we have counts for
5 papers
A Deformation Approach to Axially Symmetric Kernels on the Sphere: Harmonic Coupling and Regularity
Janin Jäger, Fabian Stallbauer
In this paper, we construct axially symmetric kernels on the sphere. We start by taking an isotropic kernel and transform it into an axially symmetric kernel via a specific deforma…
New methods for quasi-interpolation approximations: resolution of odd-degree singularities
Martin Buhmann, Janin Jäger, Joaquín Jódar +1
In this paper, we study functional approximations where we choose the so-called radial basis function method and more specifically, quasi-interpolation. From the various available…
Strictly positive definite kernels on compact Riemannian manifolds
Jean Carlo Guella, Janin Jäger
The paper studies strictly positive definite kernels on compact Riemannian manifolds. We state new conditions to ensure strict positive definiteness for general kernels and kernels…
-summability and Fourier series of B-splines with respect to their knots
Martin Buhmann, Janin Jäger, Yuan Xu
We study the -summability of functions in the -dimensional torus and so-called -invariant functions. Those are functions on the torus whose Fourie…
Strictly positive definite kernels on the -sphere: beyond radial symmetry
Janin Jäger
The paper introduces a new characterisation of strictly positive definiteness for kernels on the 2-sphere without assuming the kernel to be radially (isotropic) or axially symmetri…