System Upgrade on Tue, May 28th, 2024 at 2am (EDT)
Existing users will be able to log into the site and access content. However, E-commerce and registration of new users may not be available for up to 12 hours. For online purchase, please visit us again. Contact us at customercare@wspc.com for any enquiries.
Let be a convex polyhedron of dimension n. Denote and let be its closure. We prove that for n = 3 the semialgebraic sets and are polynomial images of ℝ3. The former techniques cannot be extended in general to represent the semialgebraic sets and as polynomial images of ℝn if n ≥ 4.
In this paper I will study a 3-parameter family of lattice parallelepipeds. I will study the behavior of the lattice with respect to the parameters and prove that three 2-parameter subfamilies have unimodular covers.