4 papers
A note on sub-orthogonal lattices
João Eloir Strapasson
It is shown that, given any -dimensional lattice , there is a lattice sequence , , with sub-orthogonal lattice , converging to (unless…
A heuristic approach for designing cyclic group codes
João E. Strapasson, Cristiano Torezzan
In this paper we propose a heuristic technique for distributing points on the surface of a unit n-dimensional Euclidean sphere, generated as the orbit of a finite cyclic subgroup o…
Quasi-perfect codes in the metric
João E. Strapasson, Grasiele C. Jorge, Antonio Campello +1
We consider quasi-perfect codes in over the metric, . Through a computational approach, we determine all radii for which there are linear…
The Ring of Integers in the Canonical Structures of the Planes
José C. Cifuente, João E. Strapasson, Ana C. Corrêa +1
The \emph{canonical structures of the plane} are those that result, up to isomorphism, from the rings that have the form $\mathds{R}[x]/(ax^2+bx+c)$ with .That ring is iso…