中国科学院数学与系统科学研究院期刊网

15 January 1996, Volume 39 Issue 1
    

  • Select all
    |
    论文
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 1-5. https://doi.org/10.12386/A1996sxxb0001
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    We introduce the concept of weak Lyapunov similarity on linear systems. And we obtain that bounded linear systems with pure point spectrum is weak Lyapunov similar to constant coefficient diagonal linear systems.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 6-15. https://doi.org/10.12386/A1996sxxb0002
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    Let G be a second countable locally compact Groupoid with Haar measure, H be a closed subgropoid of G, then we can get a Groupoid H\G2. We have proved C*(H) is Morita equivalent to C*(H\G2), which is a problem in [1]. Using the imprimitive bimodule and a homomorphism from C*(G) to M(G*(H\G2)) the induced representation from C*(H) to C*(G) is obtained.Particularly in the case of group bundles, we define a homomorphism from C*(H) to M(C*(G)) and obtain the integral form of the induced representation.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 16-23. https://doi.org/10.12386/A1996sxxb0003
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    In this paper, we establish generalized inverses of functors. We obtain that: (1) generalized inverses of functors include generalized inverses of matrices by not looking matrices as morphisms,(2) generalized inverses of functors are different from generalized inverses of morphisms, but they have the same applications in many ways.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 24-32. https://doi.org/10.12386/A1996sxxb0004
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    In this paper we gave some equivalent conditions of the fractional derivative and integral of holomorphic function f on Ω to belong to the mixed norm spaces H(p,q,)on bounded symmetric domains Ω of Cn, where 0 < p, q < and is a normal function. Applying these results, for two cases 0
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 33-40. https://doi.org/10.12386/A1996sxxb0005
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    Let R be a finite commutative local ring and let M denote the unique maximal ideal of R and k denote the residue field of R. In the present paper, the author determined the Sylow subgroups of the linear group GL.R, the symplectic group SP2nR and the hyperbolic orthogonal group O2nR. In general speaking, if chark = p, the Sylow p-subgroups of the three kinds of classical groups above are isomorphic to the subgroups generated by some special matrices respectively; if chark ≠ p, the Sylow p-subgroups of the three kinds of classical groups above are isomorphic to the wreath product of a cyclic group or a semidihedral group and finite terms of cyclic groups with type Zp.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 41-44. https://doi.org/10.12386/A1996sxxb0006
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    In this paper, the compact-covering s-images of metric spaces and locally separable metric spaces are characterized. Michael-Nagami's question has been partially answered.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 45-49. https://doi.org/10.12386/A1996sxxb0007
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    In this paper, we proved that the two conditions of linearly locally connectivity are invariant respectively under quasiconformal mappings which fixed the infinity and pointed out the condition-of fixed the infinity is essential by giving an example. On the other hand, we proved the converse of above results are true also.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 50-56. https://doi.org/10.12386/A1996sxxb0008
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    It is very importent to study congruences and congruence extensions on semigroups. Many authors, such as Petrich, Pastijn, Jones, Trotter and Stralka etc.,put their most interests into this field. Some kinds of congruences on semigroups had been investigated by means of congruence pairs, see, for example, [1],[5],[6] and [7]. In particular, the descriptions for the maximum idempotent-separated congruences and the minimum group congruences on many kinds of semigroups were given. On the other hand, the class of semigroups with the congruence extension property was involved and described, see [4], [9] and [10]. In this paper, we introduce normalities and invariances for congruences on bands, and discuss that congruences on bands extend to fully regular subsemigroups of Hall semigroups of bands.In addition, we characterize congruences on bands, such as completely invariant congruences and characteristic invariant congruences on bands according to congruence extensions on semigroups, and describe the maximum congruence extension and the minimum congruence extension for a given congruence on a band.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 57-63. https://doi.org/10.12386/A1996sxxb0009
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    In this paper we study the function f(x)= max B(u,u) - B(v, v)2, where M is a compact submanifold of a unit sphere, UM = ∪UMx is the unit tangent bundle on M, B is the second fundamental form of M. When M has parallel mean curvature,we obtain a Pinching theorem for the second fundamental form of M.If M is minimal immersed,we have the similar discussion.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 64-70. https://doi.org/10.12386/A1996sxxb0010
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    In this paper isometries and hermitain deivations on nest subalgebras of factor Von Neumann algebras are discused. It is proved that every isometry is either an isomorphism multiply by a unitary operator or an anti-isomorphism multiply by a unitary operator. We give some conditions for which every hermitain derivation on nest subalgebras of factor Von Neumann algebras is inner, and show that every hermitain derivation on nest subalgebras of finite factor Von Neumann algebras is inner.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 71-75. https://doi.org/10.12386/A1996sxxb0011
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    Let be the partially ordered set of all Turing degrees. A function j: D - D is said to be progressing if a ≤f(a) for all a ∈ D. For such a function f,we call a and b in D j-incomparable if a ≮ f(b) and b ≮ f(a), and f-comparable otherwise. The central result of the paper is that in ZFC the continuum Hypothesis 1 = 20 holds if and only if there exists a progressing function f: D → D such that any pair a and b in D is f-comparable.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 76-83. https://doi.org/10.12386/A1996sxxb0012
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    A sufficient condition for the complete convergence of the maximum of U-statistics is discussed in this article.The author exactly elaboretes the links and difference between the complete convergence of the maximum of U-statistics and that of the commonly known sums of independent random variables, widering the range of the kernelfunctions and reducing the order of moments in Chow Yuanshih's and the author's another article.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 84-95. https://doi.org/10.12386/A1996sxxb0013
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    Let R be a ring graded by any group G, H ≤ G. In [1], C. Nastasescu et al. discussed the smash product R#G/H with respect to finite G-set G/H. Our purpose in this paper is to consider a G/H-graded module and form a Morita context about R#G/H and R(H), with respect to any G-set G/H. We then apply them to discuss respectively the primitive, simplicity, prime and semiprime relating to R#G/H and R(H). In particular,we generalize some important results about group-graded rings in [2], [3] and [4].
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 96-101. https://doi.org/10.12386/A1996sxxb0014
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    By means of periodic transformations and integral manifold theory, we investigate planar periodic perturbed systems, and obtain for the strong resonant case , a condition under which an invariant torus is bifurcated from a weak focus of order one.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 102-107. https://doi.org/10.12386/A1996sxxb0015
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    In this paper, we investigate the eigenfunction expansions for the generalized Sublaplacian.By introducing the generalized -twisted convolutions, we obtain the Plancherel theorem and a Hausdorff-Young inequality. Some results are given under the condition that the eigenvalues of the generalized Sublaplacian are discrete.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 108-117. https://doi.org/10.12386/A1996sxxb0016
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    The purpose of this paper is to begin to lay the foundation of bicrossed products of Hopf algebra. The theory is motivated by asking that crossed product and crossed coproduct fit together to form a bialgebra. It is the further generalization of bismash product of Hopf algebra. We investigate the basic properties of these notions and give the exact sequence characterization of bicrossed product. We will see that any bicrossed product H with weakly inner action and inner coaction is isomorphic to a bicrossed product H A with trivial action ' and trivial coactionβ'.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 118-124. https://doi.org/10.12386/A1996sxxb0017
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    In this paper, we deal with the long time behaviors of solutions for some quasilinear parabolic equations with nonlinear boundary conditions. The necessary and sufficient conditions on the global existence of solutions are obtained.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 125-132. https://doi.org/10.12386/A1996sxxb0018
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    Associated with the endomorphism of the free semigroup S* generated by a finite alphabet S ={al, , at} there the collection of mappings on Rd and homomorphism f: S* Rd such that The generalized recurrent sets K [W] are constructed by means of those given above. Moreover the upper bound of the Hausdorff dimensions of K [W] are estimated when is the collection of homeomorphisms and the Hausdorff dimensions of K [W] are determined when is the collection of conformal contraction mappings.
  • Acta Mathematica Sinica, Chinese Series. 1996, 39(1): 133-139. https://doi.org/10.12386/A1996sxxb0019
    Abstract ( ) Download PDF ( )   Knowledge map   Save
    In this paper the nonlinear approximation problem of set-valued maps in Banach space is investigated. The characterization theorems and uniqueness theorems are given for subsets, not only convex, of vector-valued continuous functions spaces.