Palavra-chave: SPHERICAL CODES

SYMMETRY GROUPS FLAT TORUS PERFECT CODES PERFORMANCE ANALYSIS PATTERN RECOGNITION SUPERFÍCIE MODULAR CODE CONSTRUCTION LATTICE GEOMETRICALLY UNIFORM CODES GEOMETRY OF GROUPS RIEMANN SURFACE TORUS LATTICES CODES ON A FLAT TORUS GRAPH {P,Q} TESSELLATIONS ISOMETRY CODES CORRESPONDENCE ANALYSIS ANALOG SOURCE GROUP TOPOLOGY HYPERBOLIC SIGNAL CONSTELLATION OPTIMUM ENCODING GROUP CODES WIRETAP CHANNEL OPTIMUM CODES FLATTORUS SOURCE CODING FINITELY GENERATED ABELIAN GROUPS SLEPIAN CODES COSET CODES D-CHAIN ALGORITHM