Granularity-wise separation in covering approximation spaces
Ying Ge · 2008
Based on lower approximation operator C1̲ and upper approximation operator C1¯, this paper investigates granularity-wise separations in covering approximation space (U, C), where C1̲ and C1¯ are Zakowski’s approximation operators. By these investigations, some characterizations for granularity-wise separations are obtained and some relations among granularity-wise separations are established.