巻号一覧
50 巻 (1998)
- 4 号 p. 455-
- 3 号 p. 317-
- 2 号 p. 159-
- 1 号 p. 1-
50 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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TATSUYA ARAKAWA1998 年50 巻3 号 p. 317-323
発行日: 1998/09/01
公開日: 2009/05/22
ジャーナル フリーFor a nonsingular complex algebraic surface with a pencil of hyperelliptic curves of genus g over a nonsingular algebraic curve, we take two approaches to get upper bounds for the order of its automorphism group as a generalization of Chen's results on genus two fibrations. If the genus of the base curve is neither one nor zero, we estimate the order of each automorphism group of the base curve and the general fiber by a theorem of Hurwitz and that of Tuji. In the cases of rational or elliptic base curves, we use the inequality of Horikawa-Persson to see the contribution of singular fibers.抄録全体を表示PDF形式でダウンロード (221K) -
SERKAN HOSTEN1998 年50 巻3 号 p. 325-332
発行日: 1998/09/01
公開日: 2009/05/22
ジャーナル フリーIn this paper we answer a question posed by Batyrev, which asks if there exists a complete regular fan with more than quadratically many primitive collections. We construct a smooth projective toric variety associated to a complete regular d-dimensional fan with n generators where the number of primitive collections is at least exponential in n-d. We also exhibit the connection between the number of primitive collections and the facet complexity of the Gröbner fan of the associated integer program.抄録全体を表示PDF形式でダウンロード (378K) -
HYEONG IN CHOI, SEOK WOO KIM, YONG HAH LEE1998 年50 巻3 号 p. 333-348
発行日: 1998/09/01
公開日: 2009/05/22
ジャーナル フリーWe propose a new asymptotic Dirichlet problem for harmonic functions via the rough isometry on a certain class of Riemannian manifolds. We prove that this problem is solvable for naturally defined class of functions. This result generalizes those of Schoen and Yau and of Cheng.抄録全体を表示PDF形式でダウンロード (624K) -
BOLIN MA, GUOEN HU1998 年50 巻3 号 p. 349-363
発行日: 1998/09/01
公開日: 2009/05/22
ジャーナル フリーIn this paper, we prove that L2 boundedness for the maximal operators associated with the commutators generated by BMO functions and some multiplier operators. And we also study the Lp boundedness for the maximal operator associated with the commutators of spherical means and a function in BMO or Lipschitz space.抄録全体を表示PDF形式でダウンロード (438K) -
HISATOSHI IKAI1998 年50 巻3 号 p. 365-388
発行日: 1998/09/01
公開日: 2009/05/22
ジャーナル フリーUsing the notion of Jordan pairs, we give an axiomatic construction of some linear representation of an algebraic group over an arbitrary commutative ring. This representation is prehomogeneous in the sense that all the geometric fibers are prehomogeneous vector spaces modulo scalar multiplications. We also determine one generic stabilizer.抄録全体を表示PDF形式でダウンロード (909K) -
SHUN SHIMOMURA1998 年50 巻3 号 p. 389-406
発行日: 1998/09/01
公開日: 2009/05/22
ジャーナル フリーA generalized Bessel function of two variables satisfies a system of partial differential equations. Two of the singular loci of the system are of irregular type. Near one of them we study the asymptotic behavior of suitably chosen linearly independent solutions. In our calculation coalescing saddle points are treated.抄録全体を表示PDF形式でダウンロード (598K) -
MARIE-HÉLÈNE RIGAL1998 年50 巻3 号 p. 407-418
発行日: 1998/09/01
公開日: 2009/05/22
ジャーナル フリーThis article is devoted to the study of foliations for which the notion of transverse direction has a global and intrinsic meaning. These foliations are said to be transversally conformally parallelizable (TCP). This work is a part of the analysis of bihamiltonian systems defined on odd dimensional manifolds. The dynamics of such a system is linked to the dynamics of a TCP foliation naturally associated with the bihamiltonian system.
Firstly it will be proved that a connection is canonically attached to a TCP tbhation. Thus the situation can be locally linearized. However, this connection is geodesically non-complete. Our study allows this difficulty to be overcome and a precise description of TCP foliations is obtained on closed manifolds in every dimension and codimension greater than 1. In particular, this leads to a classification of the TCP flows.抄録全体を表示PDF形式でダウンロード (643K) -
KEIJI OGUISO, DE-QI ZHANG1998 年50 巻3 号 p. 419-436
発行日: 1998/09/01
公開日: 2009/05/22
ジャーナル フリーWe shall show that there is only one (resp. two) rational log Enriques surface(s) of Dynkin type D-eighteen (resp. A-eighteen).抄録全体を表示PDF形式でダウンロード (840K) -
JOSEF DORFMEISTER, GUIDO HAAK1998 年50 巻3 号 p. 437-454
発行日: 1998/09/01
公開日: 2009/05/22
ジャーナル フリーWe start the investigation of immersions of a simply connected domain into three dimensional Euclidean space which have constant mean curvature (CMC-immersions), and allow for a group of automorphisms of the domain which leave the image invariant. This leads to a detailed description of symmetric CMC-surfaces and the associated symmetry groups.抄録全体を表示PDF形式でダウンロード (781K)
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