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Last updated: July 6, 2024
藤田 直樹 (Fujita, Naoki)
熊本大学 大学院先端科学研究部
e-mail: fnaoki ``at'' kumamoto-u.ac.jp
査読付き学術雑誌掲載論文:
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N. Fujita and Y. Nishiyama,
Combinatorics of semi-toric degenerations of Schubert varieties in type C,
Math. Z. 307 (2024), article number 69.
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H. Abe, N. Fujita, and H. Zeng,
Fano and weak Fano Hessenberg varieties,
Michigan Math. J. 73 (2023), 511–555.
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N. Fujita,
Newton-Okounkov polytopes of flag varieties and marked chain-order polytopes,
Trans. Amer. Math. Soc. Series B 10 (2023), 452–481.
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N. Fujita,
Schubert calculus from polyhedral parametrizations of Demazure crystals,
Adv. Math. 397 (2022), Paper No. 108201, 42 pages.
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N. Fujita and A. Higashitani,
Newton-Okounkov bodies of flag varieties and combinatorial mutations,
Int. Math. Res. Not. IMRN 2021 (2021), 9567–9607.
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N. Fujita, E. Lee, and D. Y. Suh,
Algebraic and geometric properties of flag Bott-Samelson varieties and applications to representations,
Pacific J. Math. 309 (2020), 145–194.
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H. Abe, N. Fujita, and H. Zeng,
Geometry of regular Hessenberg varieties,
Transform. Groups 25 (2020), 305–333.
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N. Fujita,
Polyhedral realizations of crystal bases and convex-geometric Demazure operators,
Selecta Math. (N.S.) 25 (2019), Paper No. 74, 35 pages.
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N. Fujita,
Newton-Okounkov bodies for Bott-Samelson varieties and string polytopes for generalized Demazure modules,
J. Algebra 515 (2018), 408–447.
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N. Fujita,
Folding procedure for Newton-Okounkov polytopes of Schubert varieties,
Comm. Algebra 46 (2018), 2666–2692.
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N. Fujita and H. Oya,
A comparison of Newton-Okounkov polytopes of Schubert varieties,
J. Lond. Math. Soc. (2) 96 (2017), 201–227.
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N. Fujita and S. Naito,
Newton-Okounkov convex bodies of Schubert varieties and polyhedral realizations of crystal bases,
Math. Z. 285 (2017), 325–352.
プロシーディング(査読有り):
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Y. Cho, N. Fujita, A. Higashitani, and E. Lee,
Newton-Okounkov polytopes of type A flag varieties of small ranks arising from cluster structures,
to appear in Proc. Steklov Inst. Math. (Proceedings of the conference in honor of Victor Buchstaber's 80th birthday), arXiv:2310.06477v1.
論文集(査読有り):
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M. Bernal Guillén, D. Corey, M. Donten-Bury, N. Fujita, and G. Merz,
Khovanskii bases of Cox-Nagata rings and tropical geometry,
in Combinatorial Algebraic Geometry,
Fields Inst. Commun. Vol. 80, Springer, New York, 2017, 159–179.
プレプリント:
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Y. Cho, N. Fujita, and E. Lee,
On combinatorics of string polytopes in types B and C,
preprint 2023, arXiv:2306.11242v1.
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N. Fujita,
Semi-toric degenerations of Richardson varieties arising from cluster structures on flag varieties,
preprint 2021, arXiv:2110.12731v1.
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N. Fujita and H. Oya,
Newton-Okounkov polytopes of Schubert varieties arising from cluster structures,
preprint 2020, arXiv:2002.09912v2.
講究録・報告集など(査読なし):
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歪 mitosis 作用素の組合せ論,
RIMS 講究録 No. 2276 「変換群の幾何とトポロジー」, 85–93 (2024).
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C 型ストリング多面体の組合せ論,
Algebraic Lie Theory and Representation Theory 2023 報告集, 184–192 (2024).
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シューベルト・カルキュラスと凸多面体,
日本数学会2023年度年会・代数学分科会・特別講演アブストラクト, 27–40 (2023).
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既約表現の essential 基底と marked chain-order 多面体,
Algebraic Lie Theory and Representation Theory 2021 報告集, 147–156 (2021).
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表現論的特殊多面体に対する組合せ論的変異,
RIMS 講究録 No. 2183 「組合せ論的表現論の最近の進展」, 176–187 (2021).
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クラスター構造から生じる Newton-Okounkov 凸体と付随するトーリック退化,
日本数学会2021年度年会・トポロジー分科会・特別講演アブストラクト, 49–58 (2021).
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Newton-Okounkov 凸体およびクラスター構造から生じるトーリック退化,
日本数学会2020年度年会・トポロジー分科会・特別講演アブストラクト, 27–36 (2020).
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弱ファノ正則半単純ヘッセンバーグ多様体の分類,
Algebraic Lie Theory and Representation Theory 2019 報告集, 81–89 (2019).
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多面体に対する差分商作用素と結晶基底の多面体表示,
RIMS 講究録 No. 2127 「組合せ論的表現論の諸相」, 130–139 (2019).
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Tensor product representations from Newton-Okounkov bodies,
第15回数学総合若手研究集会 Technical Report 176, 63–70 (2019).
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正則ヘッセンバーグ多様体とその族の幾何学,
Algebraic Lie Theory and Representation Theory 2018 報告集, 117–125 (2018).
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旗 Bott-Samelson 多様体の幾何学的および表現論的側面,
RIMS 講究録 No. 2098 「変換群論における幾何・代数・組み合わせ論」, 111–119 (2018).
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結晶基底の多面体表示と正値性を持つ完全基底,
RIMS 講究録 No. 2075 「表現論と組合せ論」, 35–45 (2018).
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Folding procedure for Newton-Okounkov polytopes of flag varieties,
第14回数学総合若手研究集会 Technical Report 173, 95–103 (2018).
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シューベルト多様体の Newton-Okounkov 多面体と folding method,
Algebraic Lie Theory and Representation Theory 2016 報告集, 9–21 (2016).
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シューベルト多様体の Newton-Okounkov 凸体と結晶基底の多面体表示,
RIMS 講究録 No. 1992 「組合せ論的表現論とその周辺」, 18–32 (2016).
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Bott-Samelson 多様体の Newton-Okounkov 凸体と結晶基底,
Algebraic Lie Theory and Representation Theory 2015 報告集, 59–70 (2015).