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# Tsukuba Journal of Mathematics

Vol.31, No.1 (2007)
 Author Title Page Naonori Ishii and Katsuaki Yoshida The automorphism group of a cyclic p-gonal curve 1 Hiroaki Niikuni Identification of the absent spectral gaps in a class of generalized Kronig-Penney Hamiltonians 39 Aleksander Grytczuk Upper bound for sum divisors function and the Riemann hypothesis 67 Elisabetta Barletta The Lichnerowicz theorem on CR manifolds 77 Takao Hayami Hochschild cohomology ring of the integral group ring of dihedral groups 99 Teruyuki Yorioka Independent families of destructible gaps 129 Hideo Kubo and Sandra Lucente Note on weighted Strichartz estimates for Klein-Gordon equations with potential 143 Shichang Shu Curvature and rigidity of Willmore submanifolds 175 Mitsuhiro Itoh and Takanari Saotome The Serre duality theorem for holomorphic vector bundles over a strongly pseudo-convex manifold 195 Jiryo Komeda and Akira Ohbuchi On double coverings of a pointed non-singular curve with any Weierstrass semigroup 205