3 papers
math.FA2020
Edelstein's Astonishing Affine Isometry
Heinz H. Bauschke, Sylvain Gretchko, Walaa M. Moursi +1
In 1964, Michael Edelstein presented an amazing affine isometry acting on the space of square-summable sequences. This operator has no fixed points, but a suborbit that converges t…
math.OC2019
Numerical explorations of feasibility algorithms for finding points in the intersection of finite sets
Heinz H. Bauschke, Sylvain Gretchko, Walaa M. Moursi
Projection methods are popular algorithms for iteratively solving feasibility problems in Euclidean or even Hilbert spaces. They employ (selections of) nearest point mappings to ge…
q-bio.PE2018
The Effects of Climate Change on Predator-Prey Dynamics
Sylvain Gretchko, Jessa Marley, Rebecca C. Tyson
In this investigation we study the effects of climate change on predator-prey population dynamics. The interaction of predator and prey is described by the Variable Territory (VT)…