巻号一覧
21 巻 (1998)
- 3 号 p. 249-
- 2 号 p. 81-
- 1 号 p. 1-
21 巻, 3 号
選択された号の論文の9件中1～9を表示しています
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Yuichiro Takeda1998 年 21 巻 3 号 p. 249-258
発行日: 1998年
公開日: 2009/01/21
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Jong Soo Jung, Tae Hwa Kim1998 年 21 巻 3 号 p. 259-272
発行日: 1998年
公開日: 2009/04/24
ジャーナル フリーLet E be a reflexive Banach space with a uniformly Gâteaux differentiable norm, C a nonempty closed convex subset of E, and T C→E a nonexpansive mapping satisfying the inwardness condition. Assume that every weakly compact convex subset of E has the fixed point property. For u∈C and t∈(0, 1), let xt be a unique fixed point of a contraction Gt C→E, defined by Gtx=tTx+(1−t)u, x∈C. It is proved that if {xt} is bounded, then the strong limt→1xt exists and belongs to the fixed point set of T Furthermore, the strong convergence of other two schemes involving the sunny nonexpansive retraction is also given in a reflexive and strictly convex Banach space with a uniformly Gâteaux differentiable norm.抄録全体を表示PDF形式でダウンロード (1112K) -
Hideharu Ueda1998 年 21 巻 3 号 p. 273-284
発行日: 1998年
公開日: 2009/01/21
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Elisabetta Barletta, Sorin Dragomir1998 年 21 巻 3 号 p. 285-305
発行日: 1998年
公開日: 2009/04/24
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Paul Milnes1998 年 21 巻 3 号 p. 306-317
発行日: 1998年
公開日: 2009/01/21
ジャーナル フリーA simple C*-algebra is introduced that is generated by a minimal effective action of the (discrete, nilpotent, non-abelian) Heisenberg group H3 on the torus T2 It appears as a simple quotient of the group C*-algebra C*(H6, 4) of a 6-dimensional discrete nilpotent group H6, 4, and also as a C*-crossed product generated by an action of Z2 on T2 The rest of the infinite dimensional simple quotients of C*(H6, 4) are identified and displayed as C*-crossed products generated by minimal effective actions, and also as matrix algebras over simple C*-algebras from groups of lower dimension.抄録全体を表示PDF形式でダウンロード (942K) -
Naondo Jin1998 年 21 巻 3 号 p. 318-329
発行日: 1998年
公開日: 2009/01/21
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Irene Llerena, John W. Rutter1998 年 21 巻 3 号 p. 330-349
発行日: 1998年
公開日: 2009/04/24
ジャーナル フリーIn this paper we determine the group \mathscr{E}(X ∨ Y) of pointed homotopy selfequivalence classes as the quotient of an iterated semi-direct product involving \mathscr{E}(X), \mathscr{E}(Y) and the 2n-th homotopy groups of X and Y, in the case where X and Y are (n−1)-connected 2n-manifolds or, more generally, are CW-complexes obtained by attaching a 2n-cell to a one-point union ∨mSn of m copies of the n-sphere for which a certain quadratic form has non-zero determinant (n≥3). In the case of manifolds this determinant is ±1. We include some examples, in particular one in which \mathscr{E}(X ∨ Y) does not itself inherit a semi-direct product structure.抄録全体を表示PDF形式でダウンロード (1393K) -
Katsuya Ishizaki, Nobushige Toda1998 年 21 巻 3 号 p. 350-371
発行日: 1998年
公開日: 2009/04/24
ジャーナル フリーLet f and g be transcendental meromorphic functions in the complex plane having properties \bar{N}(r, f)≤uT(r, f)+S(r, f) and \bar{N}(r, g)≤vT(r, g)+S(r, g) for some constants u and v satisfying (u, v)∈[0, 1/19)×[0, 1/19). If there exist four distinct small meromorphic functions shared by f and g, then f=g.抄録全体を表示PDF形式でダウンロード (1089K) -
Nariya Kawazumi, Takeshi Uemura1998 年 21 巻 3 号 p. 372-380
発行日: 1998年
公開日: 2009/04/24
ジャーナル フリーLet a finite group G act on a compact Riemann surface C in a faithful and orientation preserving way. Then we describe the Morita-Mumford classes en(CG)∈H2n(G; Z) of the homotopy quotient (or the Borel construction) CG of the action in terms of fixed-point data. This fixed-point formula is deduced from a higher analogue of the classical Riemann-Hurwitz formula based on computations of Miller [Mi] and Morita [Mo].抄録全体を表示PDF形式でダウンロード (733K)
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