Rikuo Yamakawa
Shibaura Institute of Technology
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Publication
Featured researches published by Rikuo Yamakawa.
Applied Mathematics and Computation | 2007
Shigeyoshi Owa; Tadayuki Sekine; Rikuo Yamakawa
Abstract Two subclasses S ( α , t ) and T ( α , t ) are introduced concerning with Sakaguchi functions in the open unit disk U . Further, by using the coefficient inequalities for the classes S ( α , t ) and T ( α , t ) , two subclasses S 0 ( α , t ) and T 0 ( α , t ) are defined. The object of the present paper is to discuss some properties of functions belonging to the classes S 0 ( α , t ) and T 0 ( α , t ) .
International Journal of Mathematics and Mathematical Sciences | 2007
Mamoru Nunokawa; Shigeyoshi Owa; Tadayuki Sekine; Rikuo Yamakawa; Hitoshi Saitoh; Junichi Nishiwaki
Let a#x1D4AE;*(p,α) be the class of functions f(z) which are analytic and p-valently starlike of order α in the open unit disk E. The object of the present paper is to derive an interesting condition for f(z) to be in the class a#x1D4AE;*(p,α).
Applied Mathematics Letters | 1992
Hitoshi Saitoh; Shigeyoshi Owa; Tadayuki Sekine; Mamoru Nunokawa; Rikuo Yamakawa
Abstract The object of the present paper is to show an application of a certain integral operator for analytic functions in the unit disk.
Computers & Mathematics With Applications | 2004
Shigeyoshi Owa; Hitoshi Saitoh; H. M. Srivastava; Rikuo Yamakawa
Archive | 2005
Shigeyoshi Owa; Tadayuki Sekine; Rikuo Yamakawa
Applied Mathematics Letters | 1992
Hitoshi Saitoh; Shigeyoshi Owa; Tadayuki Sekine; Mamoru Nunokawa; Rikuo Yamakawa
Archive | 2007
Mamoru Nunokawa; Shigeyoshi Owa; Tadayuki Sekine; Rikuo Yamakawa; Hitoshi Saitoh; Junichi Nishiwaki
Archive | 2007
Tadayuki Sekine; Shigeyoshi Owa; Rikuo Yamakawa
Archive | 2006
Shigeyoshi Owa; Tadayuki Sekine; Rikuo Yamakawa
Archive | 2005
Shigeyoshi Owa; Tadayuki Sekine; Rikuo Yamakawa
