Rchr
J-GLOBAL ID：200901001505314098
Update date: Feb. 21, 2025
Fujita Yasutsugu
フジタ ヤスツグ | Fujita Yasutsugu
Affiliation and department：
Job title：
Professer
Research field (1)：
Algebra
Research keywords (2)：
rational points on elliptic curves
, Diophantine equations
Research theme for competitive and other funds (3)：
- 2024 - 2027 Study on Diophantine m-tuples and Ramanujan-Nagell type equations
- 2016 - 2020 Explicit solutions to Diophantine equations attached to families of elliptic curves
- 2013 - 2016 Study on rational points and integer points of elliptic curves and the related Diophantine equations
Papers (78)：
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Yasutsugu Fujita, Maohua Le. On the number of solutions to the generalized Ramanujan-Nagell equation $$x^2-D=4p^n. Monatshefte für Mathematik. 2025
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Yasutsugu Fujita, Maohua Le. Contributions to Ma's conjecture concerning abelian difference sets with multiplier -1 (I). Journal of Combinatorial Theory, Series A. 2025
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Yasutsugu Fujita, Ivan Soldo. On the extendibility of certain $$D(-1)$$-pairs in imaginary quadratic rings. Indian Journal of Pure and Applied Mathematics. 2025. 56. 1. 156-162
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Yasutsugu Fujita, Maohua Le. A note on the exponential Diophantine equation (ax - 1) (by - 1) = az2. Annales Mathematicae et Informaticae. 2024. 60. 44-53
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Mihai Cipu, Andrej Dujella, Yasutsugu Fujita. Extensions of a Diophantine triple by adjoining smaller elements II. Periodica Mathematica Hungarica. 2024. 89. 1. 54-60
ｍore...
MISC (9)：
Books (5)：
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Analytic Number Theory and Related Areas RIMS Kôkyûroku
Research Institute for Mathematical Sciences 2018
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計算力をつける微分積分 問題集
内田老鶴圃 2013
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計算力をつける微分方程式
内田老鶴圃 2011
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Basic Mathematics for Calculus
裳華房 2011
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計算力をつける微分積分
2008
Lectures and oral presentations (36)：
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Bounding the size of $D(\pm 1)$-tuples in imaginary quadratic rings
(Diophantine Analysis and Related Fields 2024 2024)
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Simultaneous Pell equations having at most one positive solution
(Number Theory Workshop at Waseda University 2023)
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Conjectures on the generalized Ramanujan-Nagell equation x^2+D^m=k^n
(2022大分熊本整数論研究集会 2022)
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Integral points and generators for the Mordell-Weil groups of elliptic curves
(DARF Seminar 2021)
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Estimate on the number of irregular Diophantine quadruples
(2020大分整数論研究集会 2020)
ｍore...
Education (1)：
- - 2003 Tohoku University graduate school of science department of mathematics
Work history (3)：
- 2016/04 - 現在 日本大学生産工学部教授
- 2011/04 - 2016/03 associate professor, College of Industrial Technology, Nihon University
- 2008/04 - 2011/03 日本大学生産工学部助教
Committee career (2)：
- 2014/07 - 現在 Fundamental Journal of Mathematics and Mathematical Sciences 編集委員
- 2013/04 - 2015/12 Transnational Journal of Mathematical Analysis and Applications 編集委員
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