S. A. Cook introduced in [1] the concept of p-t reducibility, and the deduced equivalent class is called the p-t degree which is partially ordered by the relation '≤' which is also deduced from the p-t reduci...S. A. Cook introduced in [1] the concept of p-t reducibility, and the deduced equivalent class is called the p-t degree which is partially ordered by the relation '≤' which is also deduced from the p-t reducibility. R. E. Ladner and K. Ambos-Spies have given a wide discussion on the structural properties of p-t degrees with '≤'. They proved that there展开更多
Definition. Let X be an algebra over number field K, and (X, T) be a fuzzy topological space defined by Lowen. If maps f: (x, y)→x+y,g:(k, x)→kx, h_a:y→ay and h^b:x→xb(x, y∈X, K∈K), are all fuzzy continuous (K i...Definition. Let X be an algebra over number field K, and (X, T) be a fuzzy topological space defined by Lowen. If maps f: (x, y)→x+y,g:(k, x)→kx, h_a:y→ay and h^b:x→xb(x, y∈X, K∈K), are all fuzzy continuous (K is equipped with usual topology, X×X and K×X are fuzzy prod-展开更多
Based on the work by S. G. Crossly and Yang Zhongqiang about the semihomeomorphic togotogical classes, this letter, investigates the structure and properties of the family of semiopen sets. Let be a family of subsets ...Based on the work by S. G. Crossly and Yang Zhongqiang about the semihomeomorphic togotogical classes, this letter, investigates the structure and properties of the family of semiopen sets. Let be a family of subsets of X closed with respect to union operation, X, φ ∈, Denote by the family of semiopn sets of topology About the condition that forms a family of semiopen sets, we obtain the following results.展开更多
文摘S. A. Cook introduced in [1] the concept of p-t reducibility, and the deduced equivalent class is called the p-t degree which is partially ordered by the relation '≤' which is also deduced from the p-t reducibility. R. E. Ladner and K. Ambos-Spies have given a wide discussion on the structural properties of p-t degrees with '≤'. They proved that there
文摘Definition. Let X be an algebra over number field K, and (X, T) be a fuzzy topological space defined by Lowen. If maps f: (x, y)→x+y,g:(k, x)→kx, h_a:y→ay and h^b:x→xb(x, y∈X, K∈K), are all fuzzy continuous (K is equipped with usual topology, X×X and K×X are fuzzy prod-
文摘Based on the work by S. G. Crossly and Yang Zhongqiang about the semihomeomorphic togotogical classes, this letter, investigates the structure and properties of the family of semiopen sets. Let be a family of subsets of X closed with respect to union operation, X, φ ∈, Denote by the family of semiopn sets of topology About the condition that forms a family of semiopen sets, we obtain the following results.
