1.4. The Relation Among Different Grain Size Worlds
Generally, we treat a problem under various grain sizes. Thus, it is necessary to establish the relationship between the worlds at different granularities.
1.4.1. The Structure of Multi-Granular Worlds
is all equivalence relations on X
, then R1
is said to be finer than R2
, and denoted by .
Under the relation ‘<’ defined in Definition ...