18 citations · 25 across the 6 of their papers we have counts for
8 papers
Concordance probability in a big data setting: application in non-life insurance
Robin Van Oirbeek, Christopher Grumiau, Tim Verdonck
The concordance probability or C-index is a popular measure to capture the discriminatory ability of a regression model. In this article, the definition of this measure is adapted…
Multiple radial positive solutions of semilinear elliptic problems with Neumann boundary conditions
Denis Bonheure, Christopher Grumiau, Christophe Troestler
Assuming is a ball in , we analyze the positive solutions of the problem \[ \begin{cases} -Δu+u= |u|^{p-2}u, &\text{ in } B_{R},\newline \partial_νu=0,&\text…
Asymptotic symmetries for fractional operators
C. Grumiau, M. Squassina, C. Troestler
In this paper, we study equations driven by a non-local integrodifferential operator with homogeneous Dirichlet boundary conditions. More precisely, we study the pr…
Convergence of a mountain pass type algorithm for strongly indefinite problems and systems
Christopher Grumiau, Christophe Troestler
For a functional $\E$ and a peak selection that picks up a global maximum of $\E$ on varying cones, we study the convergence up to a subsequence to a critical point of the sequence…
Nonlinear Schrödinger problems: symmetries of some variational solutions
Christopher Grumiau
In this paper, we are interested in the nonlinear Schrödinger problem $-Δu + Vu = \abs{u}^{p-2}u$ submitted to the Dirichlet boundary conditions. We consider and we are worki…
Lane Emden problems with large exponents and singular Liouville equations
Massimo Grossi, Christopher Grumiau, Filomena Pacella
We consider the Lane-Emden Dirichlet problem -Δu = \abs{u}^{p-1}u, in B, u =0, on \partial B, where and denotes the unit ball in $\IR^2$. We study the asymptotic behavior…