HIRATA Koichi

J-GLOBAL         Last updated: Jul 10, 2019 at 13:42
 
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Name
HIRATA Koichi
Affiliation
Ehime University
Section
Faculty of Education
Job title
Professor
Degree
Doctor (Science)(Kyoto University)

Research Areas

 
 

Education

 
 
 - 
1984
Graduate School, Division of Natural Science, Kyoto University
 
 
 - 
1978
Faculty of Science, Tokyo Institute of Technology
 

Published Papers

 
On Generalizations of Ikeda's Theorem and the Role of the Centroid
HIRATA Koichi
25(1) 9-20   Mar 2019   [Refereed]
An Extension of Ikeda's Theorem
HIRATA Koichi, SHINOMIYA Masashi
65 137-142   Dec 2018
A study on cones with curved surface bottom which has the same volume formula as the pyramid and solids that can roll smoothly without changing the height of the center of gravity
HIRATA Koichi
Japan Society of Mathematical Education, Division for Colleges and Universities   24(1) 1-14   Mar 2018   [Refereed]
Inversion invariant expressions of Hodoji type and non-Hodoji type
TABEI Katsuine, HIRATA Koichi, MATSUMOTO Toshio
Wasan Journal   2 66-72   Mar 2018
The Problems of Minbenosuke Tanaka and Eitaro Wada in their Sangaku Tablets
HIRATA Koichi
23(1) 77-90   Mar 2017   [Refereed]
The game of m-times nim and generalization of Fibonacci numbers
HIRATA Koichi
23(1) 25-38   Mar 2017   [Refereed]
On the Half-Lengths Theorem for Folding Polygons to Polyhedra
HIRATA Koichi
22(1) 27-38   Feb 2016   [Refereed]
The Problems of Sahei Oonishi and Matabei Kojima in their Sangaku Tablets
HIRATA Koichi, KAWAMURA Yasuyuki
22(1) 15-26   Feb 2016   [Refereed]
The Problems of Kiemon Yamazaki and Sataro Kuribayashi in their Sangaku Tablets
HIRATA Koichi, KAWAMURA Yasuyuki
21(1) 1-14   Jan 2015   [Refereed]
Academic Ability of the Mathematicians in the middle of the 19th centurey seen in the Sangaku of Isaniwa Shrine
HIRATA Koichi
60 195-206   Oct 2013
Theory of Tait's 8 Coin Puzzle and its Extended Puzzle
HIRATA Koichi
19(1) 25-34   Dec 2012   [Refereed]
Relations between Rokushajutsu and Ptolemy's Theorem
HIRATA Koichi
18(1) 1-12   Dec 2011   [Refereed]
ElsevierComputational Geometry   34 2-10   2006   [Refereed]
On Convex Developments of a Doubly-Covered Square
Springer-VerlagCombinatorial Geometry and Graph Theory (IJCCGGT 2003), Springer-Verlag LNCS   3330 1-13   2005   [Refereed]
Flat 2-foldings of Convex Polygons
Springer-VerlagCombinatorial Geometry and Graph Theory (IJCCGGT 2003), Springer-Verlag LNCS   3330 14-24   2005   [Refereed]
Space of polynomials without 3-fold reaf roots(jointly worked)
Journal of Mathematics of Kyoto University   42(3) 509-516   2002   [Refereed]
Alternate Proofs of Art Gallery Theorems(共著)
Bull. Fac. Educ. Ehime Univ. , Nat. Sci.   19(2) 17-22   1999
Characterization of Eight Points in the Plane Containing no Convex Pentagons (共著)
Bull. Fac. Educ. Ehime Univ. , Nat. Sci.   19(1) 1-4   1998
Multiplicity of L(k) for the Stable Decomposition of B((]G0342[)/p)n.
Mem. Fac. Educ. Ehime Univ. , Nat. Sci.   14(1) 31-34   1993
On the Multipliplicity of Indecomposable Stable Summands for the Classifying Spaces of Elementary Abelian p-Groups
Mem. Fac. Educ. Ehime Univ. , Nat. sci.   (11) 1-11   1991
On the Splitting of K-Cohomology of Lens Space Ln(pd)
Mem. Fac. Educ. Ehime Univ. , Nat. sci.   (9) 1-5   1989
A Note on the KFq-Cohomology of Lens Space L^n^_0_(ld)
Mem. Fac. Educ. Ehime Univ. , Nat. sci.   (7) 1-5   1987
A Note on the Structure of K-Ring of Lens Spaces
Mem. Fac. Educ. Ehime Univ. , Nat. sci.   (5) 1-6   1985
Publ. Res. Inst. Math. Sci. Kyoto Univ.   (20) 1083-1089   1984
On the Cohomology of Algebraic K-Spectra over Finte Fields
Publ. Res. Inst. Math. Sci. Kyoto Univ.   (19) 743-752   1983
On the Bott Cannibalistc Classes(共著)
Publ. Res. Inst. Math. Sci. Kyoto Univ.   (18) 1187-1191   1982

Conference Activities & Talks

 
Polygons which are foldable to a Regular Tetrahedron
J. Akiyama, K. Hirata, M. Kobayashi and G. Nakamura
Japan Conference on Discrete and Computational Geometry 2004   8 Oct 2004   

Research Grants & Projects

 
Study on Stable Splitting of Classifying Spaces
Grant-in-Aid for Scientific Research
Project Year: 1976   
Study on discrete geometry
Project Year: 1994