Rough law generation and the discovery of F - rough law*

For dynamic system law mining, according to function two direction S-rough sets, this paper presents the concepts of law generation and F-law relation metric; by using these concepts, this paper proposes characteristic theorem of F-rough law relation metric, dependence theorem of F-rough law relation metric, the principle of F-rough law discovery and gives the application of F-rough law in profit risk analysis. The results show that function S-rough sets is an important approach to mine the unknown system law.