Проективные модули над кольцом
псевдорациональных чиселWe prove the structure theorems which give a full description of
projective modules over the ring
Studies on Systems of Six Lines on a Projective Plane over a Prime FieldA simple six-line arrangement on a
projective plane is obtained by a system of six labelled lines L
Solving of a projection problem for convex polyhedra given by a system of linear constraints to as the polyhedral
projection problem (PPP) and serves to find a
projection of a point onto a polyhedron given