Maeda Takashi

写真a

Title

Professor

Researcher Number(JSPS Kakenhi)

30229306
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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Faculty of Science   Mathematical Sciences   Professor  

  • Concurrently   University of the Ryukyus   Graduate School of Engineering and Science   Mathematical Sciences   Professor  

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Academic degree 【 display / non-display 】

  • Hiroshima University -  Doctor of Science

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External Career 【 display / non-display 】

  • 1990.04
    　
    　

    University of the Ryukyus, Faculty of Science, Department of Mathematical Sciences, Professor  

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Research Interests 【 display / non-display 】

  • 代数幾何学

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Published Papers 【 display / non-display 】

  • On expected waiting time until given words appear in random sequence

    Takashi Maeda, Yuya Unten

    Statistics and Probability Letters   197   2023.02 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    We provide a formula for the expected waiting time more than one words appear among given words in a random sequence, and show that distributions of random variables of waiting times and their reversals are the same.

  • Correspondence between orbital varieties and sets of subspaces stable under nilpotent endomorphism

    Takashi Maeda

    JP Journal of Algebra, Number Theory and Applications ( Pushpa Publishing House )  45 ( 2 ) 157 - 186   2020.02 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    From the bijective correspondence between standard tableaux T of shape \lambda and left LR words L of weight \lambda^*, we show that generic points of orbital variety V_T and set X(T_L) of subspaces stable under a nilpotent linear endomorphism describe each other. As a resuclt, ordering defined by inclusions of closures correspond.

  • The bundaries of the sets of subspaces stable under a nilpotent linear transformation

    Takashi Maeda

    JP Journal of Algenara, Number Theory and Applications ( Pushpa Publishing House )  40 ( 4 ) 515 - 556   2018 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    Let f: V\to V be the nilpotent endomorophism of Jordan type \la and T be an LR tableau of shape \la/\mu and weight \nu. We investigate boundaries of X(T) in Grasmannain G(V,n) consistsing of f-stable subspaces W of dimension n in V with Jordan type of V/W and W equal to \mu and \nu, respectively.

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  • A decomposition of the set of subspaces stable under a nilpotent transformation

    Takashi Maeda

    Communications of Algebara   42   3980 - 4001   2014.04

    Type of publication: Research paper (scientific journal)

  • LR-fillings and partial ordering of LR-tableaux

    Takashi Maed

    JP journal of Algebra, Number Theory and Applications   33 ( 1 ) 35 - 64   2014.04

    Type of publication: Research paper (scientific journal)

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