Fujita Yasutsugu

Department of Liberal Arts and Basic SciencesProfessor

Research Keyword

  • rational points on elliptic curves
  • Diophantine equations

Field Of Study

  • Natural sciences, Algebra, Algebra

Career

  • Apr. 2016 - Present
    日本大学生産工学部教授
  • Apr. 2011 - Mar. 2016
    associate professor, College of Industrial Technology, Nihon University
  • Apr. 2008 - Mar. 2011
    日本大学生産工学部助教

Educational Background

  • 2003
    Tohoku University, graduate school of science, department of mathematics

Member History

  • Jul. 2014 - Present
    編集委員, Fundamental Journal of Mathematics and Mathematical Sciences
  • Apr. 2013 - Dec. 2015
    編集委員, Transnational Journal of Mathematical Analysis and Applications

Paper

  • A NOTE ON THE GOORMAGHTIGH EQUATION CONCERNING DIFFERENCE SETS
    YASUTSUGU FUJITA; MAOHUA LE
    Bulletin of the Australian Mathematical Society, Jun. 2024, Refereed, Not invited
    Lead
  • Diophantine triples with three parameters
    Mihai Cipu; Yasutsugu Fujita; Maurice Mignotte
    Research in Number Theory, Apr. 2024, Refereed
    Corresponding
  • Uniqueness conjecture on simultaneous Pell equations. II
    Yasutsugu Fujita; Maohua Le
    Publicationes Mathematicae Debrecen, Apr. 2024, Refereed
    Lead
  • On the length of $D(\pm 1)$‐tuples in imaginary quadratic rings
    Mihai Cipu; Yasutsugu Fujita
    Bulletin of the London Mathematical Society, Jan. 2024, Refereed
    Corresponding
  • A note on the solution to the generalized Ramanujan–Nagell equation $$x^2+(4c)^y=(c+1)^z$$
    Yasutsugu Fujita; Maohua Le; Nobuhiro Terai
    Indian Journal of Pure and Applied Mathematics, Dec. 2023, Refereed
    Lead
  • The non-existence of D(−1)-quadruples extending certain pairs in imaginary quadratic rings
    Y. Fujita; I. Soldo
    Acta Mathematica Hungarica, Jul. 2023, Refereed, Not invited
    Lead
  • A note on the ternary purely exponential Diophantine equation f^x+(f+g)^y=g^z
    Yasutsugu Fujita; Maohua Le; Nobuhiro Terai
    Tsukuba Journal of Mathematics, Jul. 2023, Refereed
    Lead
  • Uniqueness conjecture on simultaneous Pell equations
    Yasutsugu Fujita; Maohua Le
    Acta Arithmetica, Apr. 2023, Refereed, Not invited
    Lead
  • A NOTE ON THE NUMBER OF SOLUTIONS OF TERNARY PURELY EXPONENTIAL DIOPHANTINE EQUATIONS
    YASUTSUGU FUJITA; MAOHUA LE and NOBUHIRO TERAI
    Bulletin of the Australian Mathematical Society, Feb. 2023, Refereed, Not invited
    Lead
  • A note on the number of solutions of the Pillai type equation |a^x-b^y|=k
    Yasutsugu Fujita and Maohua Le
    Journal of Number Theory, Oct. 2022, Refereed, Not invited
    Lead
  • Some exponential Diophantine equations attached to Pythagorean triples
    Yasutsugu Fujita; Maohua Le and Nobuhiro Terai
    Bulletin Mathematique de la Societe des Sciences Mathematiques de Roumanie, Sep. 2022, Refereed, Not invited
    Lead
  • On exponential Diophantine equations concerning Pythagorean triples
    Nobuhiro Terai and Yasutsugu Fujita
    Publicationes Mathematicae Debrecen, Aug. 2022, Refereed, Not invited
    Last
  • A parametric family of ternary purely exponential Diophantine equation $A^x+B^y=C^z$
    Yasutsugu FUJITA and Maohua LE
    Turkish Journal of Mathematics, Jul. 2022, Refereed
    Lead
  • Extensions of a Diophantine triple by adjoining smaller elements
    Mihai Cipu; Andrej Dujella and Yasutsugu Fujita
    Mediterranean Journal of Mathematics, Jul. 2022, Refereed, Not invited
    Corresponding
  • Some exponential Diophantine equations II : The equation x^2-Dy^2=k^z for even k
    Yasutsugu Fujita and Maohua Le
    Mathematica Slovaca, Apr. 2022, Refereed, Not invited
    Lead
  • On a conjecture concerning the generalized Ramanujan-Nagell equation
    Yasutsugu Fujita and Maohua Le
    Journal of Combinatorics and Number Theory, Feb. 2022, Refereed
    Lead
  • D(−1)-tuples in the ring Z[√−k] with k > 0
    Yasutsugu Fujita and Ivan Soldo
    Publicationes Mathematicae Debrecen, Jan. 2022, Refereed, Not invited
    Lead
  • A note on the polynomial-exponential Diophantine equation (a^n − 1)(b^n − 1) = x^2
    Yasutsugu Fujita and Maohua Le
    Notes on Number Theory and Discrete Mathematics, Sep. 2021, Refereed, Not invited
  • A note on Je'smanowicz' conjecture concerning non-primitive Pythagorean triples
    Yasutsugu Fujita and Maohua Le
    Bulletin of the Australian Mathematical Society, Aug. 2021, Refereed, Not invited
    Lead
  • Dem’janenko’s Theorem on Jeśmanowicz’ Conjecture Concerning Pythagorean Triples Revisited
    Yasutsugu Fujita and Maohua Le
    Bulletin of the Malaysian Mathematical Sciences Society, Jun. 2021, Refereed, Not invited
    Lead
  • The number of irregular Diophantine quadruples for a fixed Diophantine pair or triple
    Yasutsugu Fujita
    Contemporary Mathematics, May 2021, Refereed, Not invited
    Lead
  • Diophantine triples with largest two elements in common
    Mihai Cipu; Andrej Dujella and Yasutsugu Fujita
    Periodica Mathematica Hungarica, Mar. 2021, Refereed, Not invited
    Corresponding
  • Uniqueness of Solutions to Simultaneous Pell Equations
    Yasutsugu Fujita and Maohua Le
    Bulletin of the Malaysian Mathematical Sciences Society, Jan. 2021, Refereed, Not invited
    Lead
  • On The Generalized Ramanujan–Nagell Equation x^2+(2c−1)^m=c^n
    Yasutsugu Fujita and Nobuhiro Terai
    Acta Mathematica Hungarica, Oct. 2020, Refereed, Not invited
    Lead
  • Diophantine pairs that induce certain Diophantine triples
    Mihai Cipu; Alan Filipin and Yasutsugu Fujita
    Journal of Number Theory, May 2020, Refereed, Not invited
    Corresponding
  • An Infinite Two-Parameter Family of Diophantine Triples
    Mihai Cipu; Alan Filipin and Yasutsugu Fujita
    Bulletin of the Malaysian Mathematical Sciences Society, Jan. 2020, Refereed, Not invited
    Corresponding
  • Generators and integral points on certain quartic curves
    Yasutsugu Fujita and Tadahisa Nara
    Glasnik Matematicki Series III, Dec. 2019, Refereed, Not invited
    Lead
  • There are no Diophantine quadruples of Fibonacci numbers
    Yasutsugu Fujita and Florian Luca
    Acta Arithmetica, Oct. 2018, Refereed, Not invited
    Lead
  • On the number of extensions of a Diophantine triple
    Mihai Cipu; Yasutsugu Fujita; Takafumi Miyazaki
    International Journal of Number Theory, Apr. 2018, Refereed, Not invited
    Corresponding
  • Two-parameter families of uniquely extendable Diophantine triples
    Mihai Cipu; Yasutsugu Fujita; Maurice Mignotte
    Science China Mathematics, Mar. 2018, Refereed, Not invited
    Corresponding
  • The Mordell-Weil bases for the elliptic curve of the form y2 = x3 - m2x + n2
    Yasutsugu Fujita; Tadahisa Nara
    Publicationes Mathematicae, 2018, Refereed, Not invited
    Lead
  • The regularity of diophantine quadruples
    Yasutsugu Fujita; Takafumi Miyazaki
    Transactions of the American Mathematical Society, 2018, Refereed, Not invited
  • ON DIOPHANTINE QUADRUPLES OF FIBONACCI NUMBERS
    Yasutsugu Fujita; Florian Luca
    GLASNIK MATEMATICKI, 2017, Refereed, Not invited
  • Bounds for Diophantine quintuples II
    Mihai Cipu; Alan Filipin; Yasutsugu Fujita
    PUBLICATIONES MATHEMATICAE-DEBRECEN, 2016, Refereed, Not invited
    Corresponding
  • Generators and integral points on twists of the Fermat cubic
    Yasutsugu Fujita; Tadahisa Nara
    ACTA ARITHMETICA, 2015, Refereed, Not invited
    Corresponding
  • BOUNDS FOR DIOPHANTINE QUINTUPLES
    Mihai Cipu; Yasutsugu Fujita
    GLASNIK MATEMATICKI, 2015, Refereed, Not invited
    Corresponding
  • The extendibility of Diophantine pairs II: Examples
    Alan Filipin; Yasutsugu Fujita; Alain Togbe
    JOURNAL OF NUMBER THEORY, Dec. 2014, Refereed, Not invited
    Corresponding
  • On Diophantine quintuples and D(-1)-quadruples
    Christian Elsholtz; Alan Filipin; Yasutsugu Fujita
    MONATSHEFTE FUR MATHEMATIK, Oct. 2014, Refereed, Not invited
  • Jesmanowicz' Conjecture with Congruence Relations. II
    Yasutsugu Fujita; Takafumi Miyazaki
    CANADIAN MATHEMATICAL BULLETIN-BULLETIN CANADIEN DE MATHEMATIQUES, Sep. 2014, Refereed, Not invited
  • Generators for congruent number curves of ranks at least two and three
    Yasutsugu Fujita
    JOURNAL OF THE RAMANUJAN MATHEMATICAL SOCIETY, Sep. 2014, Refereed, Not invited
  • THE EXTENDIBILITY OF DIOPHANTINE PAIRS I: THE GENERAL CASE
    Alan Filipin; Yasutsugu Fujita; Alain Togbe
    GLASNIK MATEMATICKI, 2014, Refereed, Not invited
    Corresponding
  • Generators for the elliptic curve y^2=x^3-nx of rank at least three
    Yasutsugu Fujita
    Journal of Number Theory, May 2013, Refereed, Not invited
    Lead
  • The number of Diophantine quintuples II
    Alan Filipin; Yasutsugu Fujita
    Publicationes Mathematicae Debrecen, Feb. 2013, Refereed, Not invited
    Corresponding
  • Generators and integer points on the elliptic curve y2 = x 3 - nx
    Yasutsugu Fujita; Nobuhiro Terai
    Acta Arithmetica, 2013, Refereed, Not invited
    Lead
  • Jeśmanowicz' conjecture with congruence relations
    Yasutsugu Fujita; Takafumi Miyazaki
    Colloquium Mathematicum, Nov. 2012, Refereed, Not invited
    Lead
  • The extension of the D(-k^2)-pair {k^2,k^2+1}
    Yasutsugu Fujita and Alain Togbe
    Periodica Mathematica Hungarica, Sep. 2012, Refereed, Not invited
    Lead
  • The non-extendibility of some parametric families of D(-1)-triples
    Alan Filipin; Yasutsugu Fujita; Maurice Mignotte
    Quarterly Journal of Mathematics, Sep. 2012, Refereed, Not invited
    Corresponding
  • On the rank of the elliptic curve y^2=x^3-nx
    Yasutsugu Fujita and Nobuhiro Terai
    International Journal of Algebra, Jul. 2012, Refereed, Not invited
    Lead
  • The relative upper bound for the third element in a D(-1)-quadruple
    Alan Filipin and Yasutsugu Fujita
    Mathematical Communications, Jun. 2012, Refereed, Not invited
    Corresponding
  • On the Mordell-Weil group of the elliptic curve y^2=x^3+n
    Yasutsugu Fujita; Tadahisa Nara
    Journal of Number Theory, Mar. 2012, Refereed, Not invited
    Lead
  • Integer points and independent points on the elliptic curve y^2=x^3-p^kx
    Yasutsugu Fujita and Nobuhiro Terai
    Tokyo Journal of Mathematics, Dec. 2011, Refereed, Not invited
    Lead
  • Uniqueness of the extension of the D(4k^2)-triple {k^2-4, k^2, 4k^2-4}
    Yasutsugu Fujita; Alain Togbe
    Notes on Number Theory and Discrete Mathematics, Dec. 2011, Refereed, Not invited
    Lead
  • The D(-k^2)-triple {1,k^2+1,k^2+4} with k prime
    Alan Filipin; Yasutsugu Fujita
    Glasnik Matematicki, Dec. 2011, Refereed, Not invited
    Corresponding
  • Generators for the elliptic curve y^2=x^3-nx
    Yasutsugu Fujita; Nobuhiro Terai
    Journal de theorie nombres de Bordeaux, Aug. 2011, Refereed
    Lead
  • The number of D(-1)-quadruples
    Alan Filipin and Yasutsugu Fujita
    Mathematical Communications, Dec. 2010, Refereed, Not invited
    Corresponding
  • Infinitely many insolvable Diophantine equations II
    Yasutsugu Fujita and Noriaki Kimura
    Notes on Number Theory and Discrete Mathematics, Aug. 2010, Refereed, Not invited
    Lead
  • The number of Diophantine quintuples
    Yasutsugu Fujita
    Glasnik Matematicki, Jun. 2010, Refereed, Not invited
    Lead
  • The Hoggatt-Bergum conjecture on the D(-1)-triples {F_{2k+1},F_{2k+3},F_{2k+5 } } and integer points on the attached elliptic curves
    Yasutsugu Fujita
    Rocky Mountain Journal of Mathematics, Dec. 2009, Refereed, Not invited
    Lead
  • Extensions of the D(\mp k^2)-triples {k^2,k^2±1,4k^2±1}
    Yasutsugu Fujita
    Periodica Mathematica Hungarica, Sep. 2009, Refereed, Not invited
    Lead
  • Any polynomial D(4)-quadruple is regular
    Yasutsugu Fujita and Alan Filipin
    Math. Commun., May 2008, Refereed, Not invited
    Lead
  • Any Diophantine quintuple contains a regular Diophantine quadruple
    Yasutsugu Fujita
    Proceedings of Algebra and Computation 2007, May 2008, Refereed, Not invited
    Lead
  • The extensibility of Diophantine pairs {k-1,k+1}
    Yasutsugu Fujita
    Journal of Number Theory, Feb. 2008, Refereed, Not invited
    Lead
  • Diophantine quadruples containing some triples and the number of Diophantine quintuples
    Yasutsugu Fujita
    AIP Conference Proceedings, 2008, Not refereed, Not invited
    Lead
  • Torsion on elliptic curves in isogeny classes
    Yasutsugu Fujita; Nakamura Tetsuo
    Trans.Amer.Math.Soc., Sep. 2007, Refereed, Not invited
    Lead
  • The D(1)-extensions of D(-1)-triples {1,2,c} and integer points on the attached elliptic curves
    Yasutsugu Fujita
    Acta Arithmetica, Jun. 2007, Refereed, Not invited
    Lead
  • The extensibility of D(-1)-triples {1,b,c}
    Yasutsugu Fujita
    Publ. Math. Debrecen, Jan. 2007, Refereed, Not invited
    Lead
  • The non-extensibility of D(4k)-triples {1,4k(k-1),4k^2+1} with |k| prime
    Yasutsugu Fujita
    Glas. Mat. Ser. III, Dec. 2006, Refereed, Not invited
    Lead
  • The unique representation d=4k(k^2-1) in D(4)-quadruples {k-2,k+2,4k,d}
    Yasutsugu Fujita
    Math. Commun., Aug. 2006, Refereed, Not invited
    Lead
  • The 2-primary torsion of elliptic curves in the Z_p-extensions of Q
    Yasutsugu Fujita
    Manuscripta Math., Oct. 2005, Refereed, Not invited
    Lead
  • Torsion subgroups of elliptic curves in elementary abelian 2-extensions of Q
    Yasutsugu Fujita
    Journal of Number Theory, Sep. 2005, Refereed, Not invited
    Lead
  • Torsion subgroups of elliptic curves with non-cyclic torsion over Q in elementary abelian 2-extensions of Q
    Yasutsugu Fujita
    Acta Arithmetica, Oct. 2004, Refereed, Not invited
    Lead
  • Torsion of elliptic curves over number fields
    Yasutsugu Fujita
    Tohoku Math. Publ., Mar. 2003, Refereed, Not invited
    Lead

MISC

  • The unique extensions of two parametric families of Diophantine triples
    Mihai Cipu; Yasutsugu Fujita and Maurice Mignotte
    RIMS Kokyuroku, Nov. 2021, Not refereed, Not invited
    Corresponding
  • Recent Progress on Diophantine m-tuples
    Yasutsugu Fujita
    日本大学生産工学部研究報告A, Jun. 2017, Refereed, Not invited
    Lead
  • Extendabilities of a Diophantine triple to quadruples
    Yasutsugu Fujita; Takafumi Miyazaki
    RIMS Kôkyûroku, Jan. 2017, Not refereed, Not invited
    Lead
  • Generators for the elliptic curve y(2)=x(3)-nx II
    Yasutsugu Fujita; Nobuhiro Terai
    DIOPHANTINE ANALYSIS AND RELATED FIELDS 2011 (DARF 2011), 2011, Not refereed, Not invited
  • Generators for the elliptic curve y^2=x^3-nx
    Yasutsugu Fujita; Nobuhiro Terai
    AIP Conference Proceedings, Aug. 2010, Not refereed, Not invited
    Lead
  • Generators for the elliptic curve E:y^2=x^3-nx
    Nobuhiro Terai
    Proceedings of Algebra and Computation 2009, Jul. 2010, Not refereed
    Lead
  • The extensibility of Diophantine pairs {k-1,k+1}
    Yasutsugu Fujita
    京都大学数理解析研究所講究録, Oct. 2006, Not refereed, Not invited
    Lead
  • Diophantine m-tuples and simultaneous Pell equations
    藤田育嗣
    仙台数論及び組合せ論小研究集会 2004 報告集, Mar. 2005, Not refereed, Not invited
    Lead
  • Torsion subgroups of elliptic curves in elementary abelian 2-extensions of Q
    Yasutsugu Fujita
    京都大学数理解析研究所講究録, May 2004, Not refereed, Not invited
    Lead

Books and other publications

  • Analytic Number Theory and Related Areas RIMS Kôkyûroku
    Editor, editing, Shin-ya Kadota; etc
    Research Institute for Mathematical Sciences, Nov. 2018
  • 計算力をつける微分積分 問題集
    神永正博; 藤田育嗣, Joint work, 神永正博
    内田老鶴圃, Apr. 2013, Not refereed
  • 計算力をつける微分方程式
    藤田育嗣; 間田潤, Joint work, 間田潤
    内田老鶴圃, Dec. 2011, Not refereed
  • Basic Mathematics for Calculus
    永井敦; 藤田育嗣; 武村一雄, Joint work, 永井敦,武村一雄
    裳華房, Mar. 2011, Not refereed
  • 計算力をつける微分積分
    神永正博; 藤田育嗣, Joint work, 神永正博
    内田老鶴圃, Mar. 2008, Not refereed

Lectures, oral presentations, etc.

  • Bounding the size of $D(\pm 1)$-tuples in imaginary quadratic rings
    Yasutsugu Fujita
    Diophantine Analysis and Related Fields 2024, Mar. 2024, Not invited
  • Simultaneous Pell equations having at most one positive solution
    Yasutsugu Fujita
    Number Theory Workshop at Waseda University, Mar. 2023, 早稲田大学数理科学研究所, Not invited
  • Conjectures on the generalized Ramanujan-Nagell equation x^2+D^m=k^n
    藤田育嗣
    2022大分熊本整数論研究集会, Sep. 2022, 寺井伸浩(大分大学),日比野剛士(崇城大学), Not invited
  • Integral points and generators for the Mordell-Weil groups of elliptic curves
    Yasutsugu Fujita
    DARF Seminar, May 2021, 秋山 茂樹 (筑波大学),天羽 雅昭 (群馬大学),平田 典子 (日本大学理工学部),桂田 昌紀 (慶應義塾大学経済学部),田中 孝明 (慶應義塾大学理工学部),安福 悠 (日本大学理工学部),金子 元 (筑波大学), Not invited
  • Estimate on the number of irregular Diophantine quadruples
    Yasutsugu Fujita
    2020大分整数論研究集会, Oct. 2020, 大分大学 理工学部 共創理工学科 数理科学コース 寺井伸浩, Not invited
  • The regularity of extensions of Diophantine triples or pairs
    Yasutsugu Fujita
    Representation Theory XVI, Jun. 2019, Andrej Dujella, Invited
  • Non-existence of Diophantine quadruples consisting of Fibonacci numbers
    Yasutsugu Fujita
    Diophantine Analysis and Related Fields 2019, Mar. 2019, Shigeki Akiyama, etc, Not invited
  • Simultaneous Diophantine triples and quadruples
    Yasutsugu Fujita
    Conference on Diophantine m-tuples and Related Problems II, Oct. 2018, Alain Togbe, Invited
  • Bounds for irregular Diophantine quadruples
    Yasutsugu Fujita
    Diophantine Analysis and Related Fields 2017, Jan. 2017, 秋山 茂樹 (筑波大学) 天羽 雅昭 (群馬大学) 岡崎 龍太郎 (東京大学非常勤講師) 桂田 昌紀 (慶應義塾大学) 平田 典子 (日本大学理工学部) 村田 玲音 (明治学院大学) 安福 悠 (日本大学理工学部), Not invited
  • The unique extensions of two parametric families of Diophantine triples
    Yasutsugu Fujita
    Problems and prospects in Analytic Number Theory, Oct. 2016, Hideaki Ishikawa (Shimane University) Yasutsugu Fujita(Nihon University), Not invited
  • The unique extensions of two parametric families of Diophantinetriples
    Yasutsugu Fujita
    Problems and prospects in Analytic Number Theory, Oct. 2016, Hideaki Ishikawa (Shimane University)Yasutsugu Fujita(Nihon University), Not invited
  • Extendabilities of a Diophantine triple to quadruples
    Yasutsugu Fujita
    Analytic Number Theory and Related Areas, Nov. 2015, Yuichi Kamiya, Hideaki Ishikawa, Not invited
  • Bounds for Diophantine quintuples
    Yasutsugu Fujita
    Diophantine Analysis and Related Fields 2015, Mar. 2015, Masaaki Amou, Not invited
  • Diophantine quintuples: Bounds on the elements and the number
    Yasutsugu Fujita
    Conference on Diophantine m-tuples and related problems, Nov. 2014, Alain Togbe, Invited
  • Generators for twists of Fermat's cubic and congruent number curves
    Yasutsugu Fujita; Tadahisa Nara
    Diophantine analysis and related fields 2014, Mar. 2014, Not invited
  • Properties of Diophantine quintuples
    成蹊大セミナー, Mar. 2013, Not invited
  • Recent progress on Diophantine tuples
    電通大数論セミナー, Jan. 2013, Not invited
  • Generators and integer points on the elliptic curve y^2=x^3-nx
    Nobuhiro Terai
    Diophantine analysis and related fields 2012, Jan. 2012, Not invited
  • On the Mordell-Weil group of the elliptic curve y^2=x^3+n
    Tadahisa Nara
    日本数学会秋季総合分科会, Sep. 2011, Not invited
  • Generators for the elliptic curve y^2=x^3-nx II
    Diophantine analysis and related fields 2011, Mar. 2011, Not invited
  • Diophantine m-tuples -Solutions to simultaneous Pell equations-
    日本大学生産工学部第 43 回学術講演会, Dec. 2010, Not invited
  • Generators for the elliptic curve y^2=x^3-nx
    Diophantine Analysis and Related Fields 2010, Mar. 2010, Not invited
  • Generators for the elliptic curve E:y^2=x^3-nx
    Nobuhiro Terai
    8-th Symposium on Algebra and Computation (AC2009), Dec. 2009, Ken Nakamula (Tokyo Metropolitan Univ.) Katsushi Waki (Yamagata Univ.) Hirofumi Tsumura (Tokyo Metropolitan Univ.) Shigenori Uchiyama (Tokyo Metropolitan Univ.), Not invited
  • Diophantine quadruples containing some triples and the number of Diophantine quintuples
    Diophantine Analysis and Related Fields 2008, Mar. 2008, Not invited
  • Diophantin m-tuples
    藤田育嗣
    東北数論研究集会 ---中村哲男先生退職記念---, Jan. 2008, Not invited
  • Any Diophantine quintuple contains a regular Diophantine quadruple
    Yasutsugu Fujita
    7th Symposium on Algebra and Computation, Dec. 2007, Not invited
  • Any Diophantine quintuple contains a regular Diophantine quadruple
    藤田育嗣
    日本数学会 2007年度秋季総合分科会, Sep. 2007, Not invited
  • Diophantine m-tuples
    藤田育嗣
    第14回整数論サマースクール, Aug. 2006, Not invited
  • The extensibility of Diophantine pairs {k-1,k+1}
    藤田育嗣
    Algebraic Number theory and Related Topics, Dec. 2005, Not invited
  • The extensibility of Diophantine pairs {k-1,k+1}
    Yasutsugu Fujita
    Number Theory and Beyond 国際研究集会, Oct. 2005, Not invited
  • The extensibility of Diophantine pairs {k-1,k+1}
    藤田育嗣
    首都大整数論セミナー, Jun. 2005, Not invited
  • Diophantine m-tuples and simultaneous Pell equations
    藤田育嗣
    仙台数論及び組合せ論小研究集会 2004, Jan. 2005, Not invited
  • 楕円曲線の初等アーベル 2 拡大における torsion 群
    藤田育嗣
    東北大学数学教室談話会, Jul. 2004, Not invited
  • Torsion subgroups of elliptic curves in elementary abelian 2-extensions of Q
    藤田育嗣
    Algebraic Number Theory and Related Topics, Dec. 2003, Not invited
  • Torsion on elliptic curves in isogeny classes
    藤田育嗣/中村哲男
    日本数学会 2003年度秋季総合分科会, Sep. 2003, Not invited
  • Torsion subgroups of elliptic curves in elementary abelian 2-extensions of Q
    藤田育嗣
    早稲田大学整数論研究集会, Mar. 2003, Not invited

Research Themes

  • Explicit solutions to Diophantine equations attached to families of elliptic curves
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Apr. 2016 - Mar. 2020
    Yasutsutu Fujita
  • Study on rational points and integer points of elliptic curves and the related Diophantine equations
    Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Apr. 2013 - Mar. 2016
    FUJITA Yasutsugu; TERAI Nobuhiro; NARA Tadahisa

Others

  • Intensive ...
    Jan. 2009 - Jan. 2009
  • Intensive Course
    Jan. 2009 - Jan. 2009