2 papers
math-ph2023
Moving Frames: Difference and Differential-Difference Lagrangians
Lewis C. White, Peter E. Hydon
This paper develops moving frame theory for partial difference equations and for differential-difference equations with one continuous independent variable. In each case, the theor…
math.OC2018
On the complexity of detecting positive eigenvectors of nonlinear cone maps
Bas Lemmens, Lewis White
In recent work with Lins and Nussbaum the first author gave an algorithm that can detect the existence of a positive eigenvector for order-preserving homogeneous maps on the standa…