Tsukuba Journal of Mathematics

Author

Title

Page

Toshiaki Adachi, Sadahiro Maeda and Seiichi Udagawa

Simpleness and closedness of circles in compact Hermitian symmetric spaces

Mark L. Teply and Seog Hoon Rim

On coverings of modules

Nakao Hayashi, Pavel I. Naumkin and Patrick-Nicolas Pipolo

Analytic smoothing effects for some derivative nonlinear Schrodinger equations

Xiaowei Xu and Reiko Sakamoto

Boundary value problems related to differential operators with coefficients of generalized Hermite operators

Tatsuya Arakawa

A note on normally generated line bundles on compact Riemann surfaces II

Katsuro Sakai and Shigenori Uehara

Spaces of upper semi-continuous multi-valued functions on separable metric spaces

Sandra Lucente

Nonlinear wave equation with potential

Tatsuji Tanaka

On the Chow-forms of elliptic normal curves of degree 4

Hiroyuki Kurihara

The type number on real hypersurfaces in a quaternion space form

Li Ma

On the existence of solutions of prescribing scalar curvature problem

Ryosuke Ichida

The injectivity radius and the fundamental group of compact homogeneous Riemannian manifolds of positive curvature

Janusz J. Charatonik and Pavel Pyrih

Atomic mappings can spoil lightness of open mappings

Daigo Hirohashi, Takahiro Kanno and Hiroyuki Tasaki

Area-minimizing of the cone over symmetric R-spaces

Reiko Aiyama and Kazuo Akutagawa

Kenmotsu type representation formula for spacelike surfaces in the de Sitter 3-space

Toshiji Terada

Topological lattices Ck(X) and Cp(X): Embeddings and Isomorphisms

Shin-ichi Kasai

On the microlocal structure of regular simple prehomogeneous vector space (GL(1)^2 \times SL(7), \Lambda_3+\Lambda^*_1)

Author

Title

Page

Vanishing theorem for 2-torsion instanton invariants

Yury Nikolayevsky

Surfaces with simple geodesics

Alejandro Illanes

Zero-dimensional subsets of hyperspaces

Nobuo Nakazawa

On hypoellipticity for a class of pseudo-differential operators

Hyang Sook Kim, Yong-Soo Pyo and Kyoung-Hwa Shin

On the Chern-type problem in an indefinite Kahler geometry

Henryk Michalewski

Homogeneity of K(Q)

Liu Jinlin

Ruscheweyh derivative and strongly starlike functions

Setsuo Nagai

Invariant homogeneous structures on homogeneous real hypersurfaces in a complex projective space and an odd-dimensional sphere

David E. Dobbs

When is an ordered field a metric space?

Wu Bing-Ye

Curvature pinching theorems for minimal surfaces in complex Grassmann manifolds

Hiroshi Mikawa

On exponential sums over primes in arithmetic pro-gressions

Hiroshi Mikawa

On Goldbach numbers in arithmetic progressions

Jorg Brudern and Trevor D. Wooley

On Waring's problem: two cubes and seven biquadrates

Csaba Vincze

On the existence of C-conformal changes of Riemann-Finsler metrics

Noriaki Sato

On Lagrangian H-umbilical surfaces in CP^2(C)

Beatrice Ruini and Fulvia Spaggiari

Corrigendum to "On the structure of Takahashi manifolds"

Author

Title

Page

Bin Zhu

Triangular matrix algebras over quasi-hereditary algebras

George Michael,A.A.

On the smoothing problem

Naohiro Kanesaka

Explicit structures of three-dimensional hypersurface purely elliptic singularities of type (0,1)

Tadashi Tomaru

Pinkham-Demazure construction for two dimensional cyclic quotient singularities

Massimo Cicognani, Luisa Zanghirati

Nonlinear weakly hyperbolic equations with Levi condition in Gevrey classes

Shuan Hong Wang

On the braided structures of bicrossproduct Hopf algebras

Hiroshi Mikawa

On primes in arithmetic progressions

Hong Jae Kang, Hiroyuki Tasaki

Integral geometry of real surfaces in complex projective spaces

Tatsuo Nishitani, Jean Vaillant

Smoothly symmetrizable systems and the reduced dimensions

Yutaka Iwamoto, Kazuo Tomoyasu

Higson compactifications obtained by expanding and contracting the half-open interval

Nicolas Andruskiewitsch, Sonia Natale

Counting arguments for Hopf algebras of low dimension

Sorin Dragomir, Maria Rosaria Enea

Unstable harmonic maps into real hypersurfaces of a complex Hopf manifold

Julian Fernandez Bonder, Julio D. Rossi

Life span for solutions of the heat equation with a nonlinear boundary condition

Author

Title

Page

Vitalij A. Chatyrko and Yasunao Hattori

Estimations of small transfinite dimension in separable metrizable spaces

Michele Mulazzani

On periodic Takahashi manifolds

Makoto Sakaki

Spacelike minimal surfaces in 4-dimensional Lorentzian space forms

A. Miyai

An explicit formula for the square of the Riemann zeta-function on the critical line

Hironobu Honda

Analytic regularity of solutions to the Cauchy problem for degenerate parabolic equations

Hyunjung Song

Some differential-geometric properties of R-spaces

Miguel Ortega and Juan de Dios Perez

Some conditions on the Weingarten endomorphism of real hypersurfaces in quaternionic space forms

Bogdan Suceava

The Chen invariants of warped products of hyperbolic planes and their applications to immersibility problems

Yasuo Yuzawa

Propagation of analyticity of solutions to the Cauchy problem for weakly hyperbolic semi-linear equations

S. Montgomery and H.-J. Schneider

Skew derivations of finite-dimensional algebras and actions of the double of the Taft Hopf algebra

Filip Defever and Radu Rosca

On a class of even-dimensional manifolds structured by a T-parallel connection

Yan-kui Song

Discretely star-Lindelof spaces

Takashi Okaji

A note on the wave packet transforms

Yasushi Ishikawa

A small example of non-local operators having no transmission property

Jan Jaworowski, Nguyen To Nhu, Paul Sisson, Nguyen Nhuy, and Pham Quang Trinh

Rigid spaces and the AR-Property

Tsuyoshi Hiratsuka and Nariyuki Minami

Derivation of Wigner's semi-circle law for a class of matrix ensembles via Brownian motion

Kazuyuki Hasegawa

The index and certain stability of minimal anti invariant submanifolds in Sasakian and Kahler Manifolds

Author

Title

Page

Gladys Chalom and Hector Merklen

Representation type of one point extensions of tilted euclidean algebras

Yasuo Kamata

The algorithm to calculate the period matrix of the curve x^m + yⁿ=1

Yasuyuki Nagatomo

Singular sets of ideal instantons and Poincare duality

Wu Bing-Ye

1-Type minimal surfaces in complex Grassmann manifolds and its Gauss map

Hong Jae Kang

Integral geometry on product of spheres

Satomi Oka

On the common divisor of discriminants of integers

Reiko Sakamoto

Numerical approximation of weak solutions for boundary value problems

Bang-yen Chen and Luc Vrancken

Lagrangian submanifolds of the complex hyperbolic space

Tooru Sasahara

On Chen invariant of CR-submanifolds in a complex hyperbolic space

E. Ballico

Trigonal Gorenstein curves and Weierstrass points

Camillo Costantini and Valentin Gutev

Recognizing special metrics by topological properties of the "metric"-proximal hyperspace

Toshiyuki Ichiyama

The first variation formula for Weyl structures

Adriana Nenciu

The center construction for weak Hopf algebras

Author

Title

Page

Masahiro Kaminaga and Fumihiko Nakano

Spectral properties of quasiperiodic Kronig-Penney model

Aleksander Grytczuk and Jaroslaw Grytczuk

Ljunggren's trinomials and matrix equation Ax+Ay=Az

Yoshitomo Baba and Hiroyuki Miki

On strongly almost hereditary rings

Naoya Ando

A class of real-analytic surfaces in the 3-Euclidean space

Shuan-hong Wang

A construction of braided Hopf algebras

Masanori Kozaki and Sadahiro Maeda

A characterization of extrinsic spheres in a Riemannian manifold

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

Masakazu Takiguchi

An extension of Rauch comparison theorem to glued Riemannian spaces

Norifumi Yamatani

S4-formula and S2-formula for quasi-triangular biFrobenius algebras

Sorin Dragomir and Jun Masamune

Cauchy-Riemann orbifolds

Reiko Sakamoto

Dirichlet-Neumann problem in a domain with piecewise-smooth boundary

Kazunari Sugiyama

b-Functions of regular simple prehomogeneous vector spaces

Author

Title

Page

Massimo Cicognani

The Cauchy Problem for Strictly Hyperbolic Operators with Non-Absolutely Continuous Coefficients

Ryszard Deszcz and Marian Hotlos

On Some Pseudosymmetry Type Curvature Condition

Noriaki Umeda

Blow-up and Large Time Behavior of Solutions of a Weakly Coupled System of Reaction-Diffusion Equations

Byung Keun Sohn and Dae Hyeon Pahk

Analytic Representation of Generalized Tempered Distributions of Exponential Growth by Wavelets

Zhou Jianwei

Irreducible Clifford Modules

Zhou Jianwei

Spinors, Calibrations and Grassmannians

Antonio J. Di Scala

Autoparallel distributions and splitting theorems

Charles B. Ragozzine, Jr

Hopf Algebras Generated by a Coalgebra

Osamu SHUKUZAWA

Diagonalization of elements of Freudenthal R-vector space and split Freudenthal R-vector space

Kuniko SAKAMOTO

Three-Distance Sequences with Three Symbols

Katsuro Sakai and Masato Yaguchi

Characterizing Manifolds Modeled on Certain Dense Subspaces of Non-Separable Hilbert Spaces

Takao Komatsu

Simple Continued Fraction Expansions of Some Values of Certain Hypergeometric Functions

Kazuya Hayashida

Unique continuation for fast diffusion

Daniele Del Santo and Martino Prizzi

A remark on well-posedness for hyperbolic equations with singular coefficients

Toshikazu Miyashita

Fixed points subgroups by two involutive automorphisms σ, γ of compact exceptional Lie groups F₄, E₆ and E₇

Author

Title

Page

Fumihiko HIROSAWA and Hideo NAKAZAWA

Rapid decay of the total energy for dissipative wave equations

Atsuko Fujisawa

The classification of 3-dimensional hypersurface purely elliptic singularities of (0,1)-type

Seiji Hiraba

Asymptotic estimates for densities of multi-dimensional stable distributions

Tetsuya Hosaka

A splitting theorem for CAT (0) spaces with the geodesic extension property

Mohamed Tahar Kadaoui ABBASSI and Maati SARIH

Killing vector fields on tangent bundles with Cheeger-Gromoll metric

Koji Tsushima

On a decomposition of Bruhat type for a certain finite group

Saburo UCHIYAMA

On the generalized Josephus problem

J. Hancl and S. Sobkova

A general criterion for linearly unrelated sequences

Satoru Kikuchi

Bound for the Weierstrass weights of points on a smooth plane algebraic curve

Taka-aki Tanaka

Algebraic independence of Fibonacci reciprocal sums associated with Newton's method

Tatsuo Nishitani and Jean Vaillant

Smoothly symmetrizable systems and the reduced dimensions II

Yoshio Tanaka and Yuuko Shimizu

Products of k-spaces, and special countable spaces

Yuki Kurokawa and Hiroyuki Takamura

A weighted pointwise estimate for two dimensional wave equations and its application to nonlinear systems

Author

Title

Page

Analytic smoothing effects for a class of dispersive equations

Masakazu Takamura

On the Estimate of the Arithmetic Genus for Normal Two-Dimensional Singularities on Double Coverings

Takashi SADAMATSU

On a necessary condition for the wellposedness of the Cauchy problem for some degenerate parabolic equations

Shou Lin and Li Yan

A note on spaces with σ-compact-finite weak base

Mitsuaki Yato

On the Verschiebung morphism for g(λ)

Nobutaka Boumuki

Isotropic immersions and parallel immersions of space forms into space forms

Tomonori Noda

Reduciton of locally conformal symplectic manifolds with examples of non-Kähler Manifolds

Alessandro Morando

Hypoellipticity and local solvability of pseudolocal continuous linear operators in Gevrey classes

H. Murat Tuncali and Vesko Valov

On Finite-dimensional maps

Alessandro Languasco

On the exceptional set of Hardy-Littlewood's numbers in short intervals

Piotr Dacko

On almost para-cosymplectic manifolds

Yanhua Wang and Pu Zhang

Construct bi-Frobenius algebras via quivers

Naoya Ando

Parallel curved surfaces

Author

Title

Page

Joujuu Ohmori

Simple components of Q [Sp₄(F_q)]

E. Ballico

Holomorphic vector bundles on quadric hypersurfaces of infinite-dimensional projective spaces

Nobuya Suzuki

Quantifier elimination results for products of ordered Abelian groups

Edgar E. Enochs and Overtoun M. G. Jenda

Gorenstein injective modules and Ext

Marco Cappiello

Fourier integral operators of infinite order and applications to SG-hyperbolic equations

Tatsuji Tanaka

On arithmetical bounds of Chow-forms

Shuan-hong Wang

A Maschke Type Theorem for Hopf π-Comodules

Masafumi Yoshino

Diophantine phenomena in commuting vector fields and diffeomorphisms

Filip Defever and R.Rosca

Riemannian manifolds structured by a local conformal section

Elisabetta Barletta and Sorin Dragomir

On the regularity of weak subelliptic F-harmonic maps

Reiko SAKAMOTO

Restricted energy inequalities and numerical approximations

T.Banakh, R.Cauty, K.Trushchak, and L.Zdomskyi

On Universality of Finite Products of Polish Spaces