We prove rigidity results for compact Riemannian manifolds in the spirit of Tachibana. For example, we observe that with divergence free Weyl tensors and $\lfloor \frac{n-1}{2} \rfloor$-nonnegative curvature operators are locally symmetric or conformally equivalent to a quotient sphere. The main focus paper is similar special holonomy. In particular, consider K\"ahler Bochner tensor. quaternion...

Taishi Harada, Yuji Yoshida, Yasuhiko Kitasato, Nobuko Tsuruta, Kentaro Wakamatsu, Takako Hirota, Makoto Tanaka, Naoki Tashiro, Hiroshi Ishii, Motokimi Shiraishi, Masaki Fujita, Nobuhiko Nagata and Kentaro Watanabe Dept of Respiratory Medicine, Fukuoka University School of Medicine, Fukuoka, Japan. Dept of Respiratory Medicine, Kurume Dai-ichi Hospital, Kurume, Japan. Dept of Respiratory Medici...

A Study of Passive Sensitization of Guinea Pigs with Antigen-Antibody Complexes. LEON T. ROSENBER¢~ AND DORA K. TACHIBANA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Specificity of Encephalitogen-Induced Inhibition of Experimental "Allergic" Encephalomyelitis in the Guinea Pig. CHENG-MEI SHAW, ELLSWORTH C. ALvom), JR., WILLSON J. FAHLBERG AND MARIAN W. KIES . . . . . . . ...

In Parkinson's disease, an increase in beta oscillations within the basal ganglia nuclei has been shown to be associated with difficulty in movement initiation. An important role in the generation of these oscillations is thought to be played by the motor cortex and by a network composed of the subthalamic nucleus (STN) and the external segment of globus pallidus (GPe). Several alternative mode...

Most indigenous citrus varieties are assumed to be natural hybrids, but their parentage has so far been determined in only a few cases because of their wide genetic diversity and the low transferability of DNA markers. Here we infer the parentage of indigenous citrus varieties using simple sequence repeat and indel markers developed from various citrus genome sequence resources. Parentage tests...

Our aim in this paper is to study of silver Riemannian structures on manifold and bundle. An integrability condition curvature properties for structure are investigated via the Tachibana operator. Twin metric defined some twin investigated. Examples given tangent cotangent bundles.

Satoru KATO, Eiko YAMASHITA, Satoshi OGASAWARA, Hidetaka NORITOMI, Hiroshi TACHIBANA and Hidetoshi KURAMOCHI Department of Applied Chemistry, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachiohji, Tokyo 192-0397, Japan Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan (Received January 5, 2011; Acce...