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Tropical mathematics and combinatorics on Young tableaux

Research Project

Project/Area Number 19K03605
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12030:Basic mathematics-related
Research InstitutionKeio University (2022-2024)
Tokai University (2019-2021)

Principal Investigator

IWAO Shinsuke  慶應義塾大学, 商学部(日吉), 准教授 (70634989)

Project Period (FY) 2019-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywordsトロピカル数学 / ヤング図形 / 非可換作用素 / 対称関数 / ヤング盤 / 組み合わせ論 / 対称多項式 / ボゾン・フェルミオン対応 / 旗多様体のK理論 / シンプレクティック旗多様体 / Kピーターソン同型 / Young盤 / 可積分系 / 非可換シューア関数 / グロタンディーク多項式 / ボゾンフェルミオン対応 / 超離散可積分系
Outline of Research at the Start

トロピカル数学とは,通常の数学における「掛け算と足し算」を,「足し算とmax演算」に置き換えて作られる数学のことである.21世紀に入って,トロピカル数学の考え方を利用することで,これまでとは全く違う方法によって,数学応用上興味深い問題を証明できることが明らかになってきた.本研究では,この新しいトロピカル数学を,「可積分系」と呼ばれる古くから研究されている微分方程式の理論と組み合わせることで,「ヤング盤の組み合わせ論」という数学上の問題の解決に取り組む.

Outline of Final Research Achievements

This study develops a new framework that bridges classical integrable systems, a class of differential equations, with the modern geometric technique of “quantum K-theory.” Quantum K-theory extends the cohomology theory of geometry into an algebraic toolkit for computing the structure of shapes (topology). Focusing on the flag variety, a geometric object of key importance in mathematical physics, we investigate its quantum K-theory. As a result, we identify that the classical integrable system corresponding to the quantum K-theory of the flag variety is the relativistic Toda equation.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、「量子K理論」と「古典可積分系」という2つの分野にわたり、その基礎基盤を与えるものである。これらの分野は、数学および理論物理学における「量子化」研究の一部である。量子の数学は、「とてつもなく困難な計算」と「非常に美しい構造」という相反する2つの面を持ち、それゆえに、高速計算手法や暗号など、未来の数理技術の基礎となることが期待される。また、学術的には幾何学・確率論・組合せ論の連携を促し、新たな数理構造解明の礎となる。

Report

(7 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (21 results)

All 2024 2023 2022 2021 2020 2019 Other

All Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (10 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Remarks (2 results)

  • [Journal Article] Tetrahedron equation and Schur functions2024

    • Author(s)
      Iwao Shinsuke、Motegi Kohei、Ohkawa Ryo
    • Journal Title

      Journal of Physics A: Mathematical and Theoretical

      Volume: 58 Issue: 1 Pages: 015201-015201

    • DOI

      10.1088/1751-8121/ad9675

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Free fermions and canonical Grothendieck polynomials2024

    • Author(s)
      Iwao Shinsuke、Motegi Kohei、Scrimshaw Travis
    • Journal Title

      Algebraic Combinatorics

      Volume: 7 Issue: 1 Pages: 245-274

    • DOI

      10.5802/alco.332

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Closed k-Schur Katalan functions as K-homology Schubert representatives of the affine Grassmannian2024

    • Author(s)
      Ikeda Takeshi、Iwao Shinsuke、Naito Satoshi
    • Journal Title

      Transactions of the American Mathematical Society, Series B

      Volume: 11 Issue: 20 Pages: 667-702

    • DOI

      10.1090/btran/184

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Free fermions and Schur expansions of multi-Schur functions2023

    • Author(s)
      Iwao Shinsuke
    • Journal Title

      Journal of Combinatorial Theory, Series A

      Volume: 198 Pages: 105767-105767

    • DOI

      10.1016/j.jcta.2023.105767

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Free fermions and Schur expansions of multi-Schur functions2023

    • Author(s)
      Shinsuke Iwao
    • Journal Title

      Journal of Combinatorial Theory, Series A

      Volume: -

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Free-fermions and skew stable Grothendieck polynomials2022

    • Author(s)
      Shinsuke Iwao
    • Journal Title

      Journal of Algebraic Combinatorics

      Volume: 56 Issue: 2 Pages: 493-526

    • DOI

      10.1007/s10801-022-01121-6

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Neutral-fermionic presentation of the K-theoretic Q-function2022

    • Author(s)
      Shinsuke Iwao
    • Journal Title

      Journal of Algebraic Combinatorics

      Volume: 55 Issue: 2 Pages: 629-662

    • DOI

      10.1007/s10801-021-01064-4

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Grothendieck polynomials and?the?boson-fermion correspondence2020

    • Author(s)
      Iwao Shinsuke
    • Journal Title

      Algebraic Combinatorics

      Volume: 3 Issue: 5 Pages: 1023-1040

    • DOI

      10.5802/alco.116

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Grothendieck polynomials and the Boson-Fermion correspondence2020

    • Author(s)
      Shinsuke Iwao
    • Journal Title

      Algebraic Combinatorics

      Volume: 掲載決定

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Fermionic description of K-theoretic symmetric functions of type A and C2023

    • Author(s)
      Shinsuke Iwao
    • Organizer
      SIDE 14.2
    • Related Report
      2023 Research-status Report 2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Pushing/blocking TASEPと非可換シューア作用素2023

    • Author(s)
      岩尾慎介
    • Organizer
      非線形波動から可積分系へ2023
    • Related Report
      2023 Research-status Report
  • [Presentation] K-theoretic symmetric polynomials and noncommutative Schur functions2022

    • Author(s)
      岩尾慎介
    • Organizer
      トロピカル数学とYoung盤の組み合わせ論の研究
    • Related Report
      2022 Research-status Report
  • [Presentation] K-理論版特殊多項式の組み合わせ論、自由フェルミオン表示と可積分系2021

    • Author(s)
      岩尾慎介
    • Organizer
      離散数理モデリングセミナー
    • Related Report
      2021 Research-status Report
  • [Presentation] GQ関数のボゾン・フェルミオン構成2021

    • Author(s)
      岩尾慎介
    • Organizer
      K理論的シューベルト・カルキュラスにおける最近の発展
    • Related Report
      2021 Research-status Report
  • [Presentation] Free-fermionic presentation of stable Grothendieck polynomials2021

    • Author(s)
      岩尾慎介
    • Organizer
      日本数学会2021年度年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 超離散可積分系と Young 盤の組み合わせ論 (Shape Change Theorem)1・2・32019

    • Author(s)
      岩尾慎介
    • Organizer
      2019年度函数方程式論サマーセミナー
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Tropical KP and Young tableaux2019

    • Author(s)
      Shinsuke Iwao
    • Organizer
      The XXVIth International Conference on Integrable Systems and Quantum symmetries
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 可積分系と代数曲線とヤング図形の組み合わせ論2019

    • Author(s)
      岩尾慎介
    • Organizer
      紀尾井町数理セミナー
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Tropical KP equation and Young tableaux2019

    • Author(s)
      岩尾慎介
    • Organizer
      Workshop on Hamiltonian systems and Lie groups
    • Related Report
      2019 Research-status Report
  • [Remarks] 慶應義塾研究者情報データベース

    • URL

      https://www.k-ris.keio.ac.jp/html/100016148_ja.html?k=%E5%B2%A9%E5%B0%BE

    • Related Report
      2024 Annual Research Report
  • [Remarks] 慶應義塾研究者情報データベース

    • URL

      https://k-ris.keio.ac.jp/html/100016148_ja.html

    • Related Report
      2023 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2026-01-16  

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