Tsukuba Journal of Mathematics

Vol.28, No.2 (2004)
Author  Title  Page  Joujuu Ohmori  Simple components of Q [Sp_{4}(F_{q})]  245  E. Ballico  Holomorphic vector bundles on quadric hypersurfaces of infinitedimensional projective spaces  279  Nobuya Suzuki  Quantifier elimination results for products of ordered Abelian groups  291  Edgar E. Enochs and Overtoun M. G. Jenda  Gorenstein injective modules and Ext  303  Marco Cappiello  Fourier integral operators of infinite order and applications to SGhyperbolic equations  311  Tatsuji Tanaka  On arithmetical bounds of Chowforms  363  Shuanhong Wang  A Maschke Type Theorem for Hopf πComodules  377  Masafumi Yoshino  Diophantine phenomena in commuting vector fields and diffeomorphisms  389  Filip Defever and R.Rosca  Riemannian manifolds structured by a local conformal section  401  Elisabetta Barletta and Sorin Dragomir  On the regularity of weak subelliptic Fharmonic maps  417  Reiko SAKAMOTO  Restricted energy inequalities and numerical approximations  437  T.Banakh, R.Cauty, K.Trushchak, and L.Zdomskyi  On Universality of Finite Products of Polish Spaces  455  

Vol.29, No.1 (2005)
Author  Title  Page   Bifurcation of the Kolmogorov flow with an external friction  1  Nobuya Suzuki  Models of Peano arithematic as modules over initial segments  19  Zejun Hu and Haizhong Li  A rigidity theorem for hypersurfaces with positive Moebius Ricci curvature in S^{n+1}  29  Saburô UCHIYAMA  A Note on the Generalized Josephus Problem  49  Takuma Ogawa  Similarities between the trigonometric function and the lemniscate function from arithmetic view point  65  Takumi Yamada  A Construction of Compact PseudoKähler Solvmanifolds with no Kähler Structures  79  Reiko SAKAMOTO  Energy method for numerical analysis  111  Gabriela Putinar  Finite jet determination for biholomorphisms of realanalytic hypersurfaces in C^{N}  147  Shinichi YASUTOMI  On A New Algorithm for Inhomogeneous Diophantine Approximation  173  Kaori Yamazaki  Extending pointwise bounded equicontinuous collections of functions  197  Reiko SAKAMOTO  A complete sequence of orthogonal subsets in H^{M} (R^{n}) and a numerical approximation for boundary value problems  215  Yun Myung Oh and Joon Hyuk Kang  Lagrangian Humbilical submanifolds in quaternion Euclidean spaces  233  Takahiko FURUYA  On an algebra associated with a circular quiver and its periodic projective bimodule resolution  247  Gastón Andrés García  On Hopf algebras of dimension p^{3}  259  

Vol.29, No.2 (2005)
Author  Title  Page   Scattering for Nonlinear Symmetric Hyperbolic Systems  285  Takaaki Ohkubo and Kunio Sakamoto  CR EinsteinWeyl structures  309  Takao Hayami  On Hochschld cohomology ring of the integral group ring of the quaternion group  363  Alina Iacob  Generalized Tate cohomology  389  Yuki Haraguchi  On Noncommutative extensions of Ga by Gm over an FpAlgebra  405  Yasuhiro Niitsuma  On the extensions of Wn by G over an ZpAlgebra  437  Jinichi Itoh and Fumiko Ohtsuka  Total curvature of noncompact piecewise Riemannian 2Polyhedra  471  Mukut Mani Tripathi, Tooru Sasahara and JeongSik Kim  On invariant submanifolds of contact metric manifolds  495  UHang Ki and Setsuo Nagai  Real hypersurfaces of a nonflat complex space form in terms of the Ricci tensor  511  Aleksander Grytczuk and Barbara Medryk  On a result of FlammenkampLuca concerning noncototient sequence  533  Takashi OKAYASU  A Gap theorem for complete fourdimensional manifolds with dW+ = 0  539  

Vol.27, No.2 (2003)
Author  Title  Page  Fumihiko HIROSAWA and Hideo NAKAZAWA  Rapid decay of the total energy for dissipative wave equations  217  Atsuko Fujisawa  The classification of 3dimensional hypersurface purely elliptic singularities of (0,1)type  233  Seiji Hiraba  Asymptotic estimates for densities of multidimensional stable distributions  261  Tetsuya Hosaka  A splitting theorem for CAT (0) spaces with the geodesic extension property  289  Mohamed Tahar Kadaoui ABBASSI and Maati SARIH  Killing vector fields on tangent bundles with CheegerGromoll metric  295  Koji Tsushima  On a decomposition of Bruhat type for a certain finite group  307  Saburo UCHIYAMA  On the generalized Josephus problem  319  J. Hancl and S. Sobkova  A general criterion for linearly unrelated sequences  341  Satoru Kikuchi  Bound for the Weierstrass weights of points on a smooth plane algebraic curve  359  Takaaki Tanaka  Algebraic independence of Fibonacci reciprocal sums associated with Newton's method  375  Tatsuo Nishitani and Jean Vaillant  Smoothly symmetrizable systems and the reduced dimensions II  389  Yoshio Tanaka and Yuuko Shimizu  Products of kspaces, and special countable spaces  405  Yuki Kurokawa and Hiroyuki Takamura  A weighted pointwise estimate for two dimensional wave equations and its application to nonlinear systems  417  

Vol.28, No.1 (2004)
Author  Title  Page   Analytic smoothing effects for a class of dispersive equations  1  Masakazu Takamura  On the Estimate of the Arithmetic Genus for Normal TwoDimensional Singularities on Double Coverings  35  Takashi SADAMATSU  On a necessary condition for the wellposedness of the Cauchy problem for some degenerate parabolic equations  75  Shou Lin and Li Yan  A note on spaces with σcompactfinite weak base  85  Mitsuaki Yato  On the Verschiebung morphism for g(λ)  93  Nobutaka Boumuki  Isotropic immersions and parallel immersions of space forms into space forms  117  Tomonori Noda  Reduciton of locally conformal symplectic manifolds with examples of nonKähler Manifolds  127  Alessandro Morando  Hypoellipticity and local solvability of pseudolocal continuous linear operators in Gevrey classes  137  H. Murat Tuncali and Vesko Valov  On Finitedimensional maps  155  Alessandro Languasco  On the exceptional set of HardyLittlewood's numbers in short intervals  169  Piotr Dacko  On almost paracosymplectic manifolds  193  Yanhua Wang and Pu Zhang  Construct biFrobenius algebras via quivers  215  Naoya Ando  Parallel curved surfaces  223  

Vol.26, No.1 (2002)
Author  Title  Page  Gladys Chalom and Hector Merklen  Representation type of one point extensions of tilted euclidean algebras  1  Yasuo Kamata  The algorithm to calculate the period matrix of the curve x^{m} + y^{n}=1  15  Yasuyuki Nagatomo  Singular sets of ideal instantons and Poincare duality  39  Wu BingYe  1Type minimal surfaces in complex Grassmann manifolds and its Gauss map  49  Hong Jae Kang  Integral geometry on product of spheres  61  Satomi Oka  On the common divisor of discriminants of integers  69  Reiko Sakamoto  Numerical approximation of weak solutions for boundary value problems  79  Bangyen Chen and Luc Vrancken  Lagrangian submanifolds of the complex hyperbolic space  95  Tooru Sasahara  On Chen invariant of CRsubmanifolds in a complex hyperbolic space  119  E. Ballico  Trigonal Gorenstein curves and Weierstrass points  133  Camillo Costantini and Valentin Gutev  Recognizing special metrics by topological properties of the "metric"proximal hyperspace  145  Toshiyuki Ichiyama  The first variation formula for Weyl structures  171  Adriana Nenciu  The center construction for weak Hopf algebras  189  

Vol.26, No.2 (2002)
Author  Title  Page  Masahiro Kaminaga and Fumihiko Nakano  Spectral properties of quasiperiodic KronigPenney model  205  Aleksander Grytczuk and Jaroslaw Grytczuk  Ljunggren's trinomials and matrix equation Ax+Ay=Az  229  Yoshitomo Baba and Hiroyuki Miki  On strongly almost hereditary rings  237  Naoya Ando  A class of realanalytic surfaces in the 3Euclidean space  251  Shuanhong Wang  A construction of braided Hopf algebras  269  Masanori Kozaki and Sadahiro Maeda  A characterization of extrinsic spheres in a Riemannian manifold  291  J.N. Alonso Alvarez, J.M. Fernandez Vilaboa and R. Gonzalez Rodriguez  The Hopf algebra structure of a crossed product in a braided monoidal category  299  Masakazu Takiguchi  An extension of Rauch comparison theorem to glued Riemannian spaces  313  Norifumi Yamatani  S4formula and S2formula for quasitriangular biFrobenius algebras  339  Sorin Dragomir and Jun Masamune  CauchyRiemann orbifolds  351  Reiko Sakamoto  DirichletNeumann problem in a domain with piecewisesmooth boundary  387  Kazunari Sugiyama  bFunctions of regular simple prehomogeneous vector spaces  407  

Vol.27, No.1 (2003)
Author  Title  Page  Massimo Cicognani  The Cauchy Problem for Strictly Hyperbolic Operators with NonAbsolutely Continuous Coefficients  1  Ryszard Deszcz and Marian Hotlos  On Some Pseudosymmetry Type Curvature Condition  13  Noriaki Umeda  Blowup and Large Time Behavior of Solutions of a Weakly Coupled System of ReactionDiffusion Equations  31  Byung Keun Sohn and Dae Hyeon Pahk  Analytic Representation of Generalized Tempered Distributions of Exponential Growth by Wavelets  47  Zhou Jianwei  Irreducible Clifford Modules  57  Zhou Jianwei  Spinors, Calibrations and Grassmannians  77  Antonio J. Di Scala  Autoparallel distributions and splitting theorems  99  Charles B. Ragozzine, Jr  Hopf Algebras Generated by a Coalgebra  103  Osamu SHUKUZAWA  Diagonalization of elements of Freudenthal Rvector space and split Freudenthal Rvector space  113  Kuniko SAKAMOTO  ThreeDistance Sequences with Three Symbols  129  Katsuro Sakai and Masato Yaguchi  Characterizing Manifolds Modeled on Certain Dense Subspaces of NonSeparable Hilbert Spaces  143  Takao Komatsu  Simple Continued Fraction Expansions of Some Values of Certain Hypergeometric Functions  161  Kazuya Hayashida  Unique continuation for fast diffusion  175  Daniele Del Santo and Martino Prizzi  A remark on wellposedness for hyperbolic equations with singular coefficients  189  Toshikazu Miyashita  Fixed points subgroups by two involutive automorphisms σ, γ of compact exceptional Lie groups F_{4}, E_{6} and E_{7}  199  

Vol.24, No.2 (2000)
Author  Title  Page   Vanishing theorem for 2torsion instanton invariants  221  Yury Nikolayevsky  Surfaces with simple geodesics  233  Alejandro Illanes  Zerodimensional subsets of hyperspaces  249  Nobuo Nakazawa  On hypoellipticity for a class of pseudodifferential operators  257  Hyang Sook Kim, YongSoo Pyo and KyoungHwa Shin  On the Cherntype problem in an indefinite Kahler geometry  279  Henryk Michalewski  Homogeneity of K(Q)  297  Liu Jinlin  Ruscheweyh derivative and strongly starlike functions  303  Setsuo Nagai  Invariant homogeneous structures on homogeneous real hypersurfaces in a complex projective space and an odddimensional sphere  311  David E. Dobbs  When is an ordered field a metric space?  325  Wu BingYe  Curvature pinching theorems for minimal surfaces in complex Grassmann manifolds  337  Hiroshi Mikawa  On exponential sums over primes in arithmetic progressions  351  Hiroshi Mikawa  On Goldbach numbers in arithmetic progressions  361  Jorg Brudern and Trevor D. Wooley  On Waring's problem: two cubes and seven biquadrates  387  Csaba Vincze  On the existence of Cconformal changes of RiemannFinsler metrics  419  Noriaki Sato  On Lagrangian Humbilical surfaces in CP^2(C)  427  Beatrice Ruini and Fulvia Spaggiari  Corrigendum to "On the structure of Takahashi manifolds"  433  

Vol.25, No.1 (2001)
Author  Title  Page  Bin Zhu  Triangular matrix algebras over quasihereditary algebras  1  George Michael,A.A.  On the smoothing problem  13  Naohiro Kanesaka  Explicit structures of threedimensional hypersurface purely elliptic singularities of type (0,1)  47  Tadashi Tomaru  PinkhamDemazure construction for two dimensional cyclic quotient singularities  75  Massimo Cicognani, Luisa Zanghirati  Nonlinear weakly hyperbolic equations with Levi condition in Gevrey classes  85  Shuan Hong Wang  On the braided structures of bicrossproduct Hopf algebras  103  Hiroshi Mikawa  On primes in arithmetic progressions  121  Hong Jae Kang, Hiroyuki Tasaki  Integral geometry of real surfaces in complex projective spaces  155  Tatsuo Nishitani, Jean Vaillant  Smoothly symmetrizable systems and the reduced dimensions  165  Yutaka Iwamoto, Kazuo Tomoyasu  Higson compactifications obtained by expanding and contracting the halfopen interval  179  Nicolas Andruskiewitsch, Sonia Natale  Counting arguments for Hopf algebras of low dimension  187  Sorin Dragomir, Maria Rosaria Enea  Unstable harmonic maps into real hypersurfaces of a complex Hopf manifold  203  Julian Fernandez Bonder, Julio D. Rossi  Life span for solutions of the heat equation with a nonlinear boundary condition  215  