The normal graded approximation and variable precision approximation are defined in approximate space. The relationship between graded approximation and variable precision approximation is studied, and an important formula of conversion between them is achieved. The product approximation of grade and precision is defined and its basic properties are studied.
How to verify that a given fuzzy set A∈F(X *) is a fuzzy code? In this paper, an algorithm of test has been introduced and studied with the example of test. The measure notion for a fuzzy code and a precise formulation of fuzzy codes and words have been discussed. sification:90K20,94D05.
Mo Zhiwen Pen Jiayin Dept,of Math., Sichuan Normal Univ., Chengdu 610066. Dept. of Math., Neijiang Teacher’s College, Neijiang 641002.
