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Complex multiangular line systems and sphere packings

Research Project

Project/Area Number 24K06829
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 InstitutionShimane University

Principal Investigator

SZOLLOSI FERENC  島根大学, 学術研究院理工学系, 講師 (50895985)

Project Period (FY) 2024-04-01 – 2029-03-31
Project Status Granted (Fiscal Year 2024)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2028: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2027: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2026: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2025: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2024: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords複素アダマール行列 / 距離集合 / Multiangular lines / Sphere packings / Computation
Outline of Research at the Start

This project aims to study dense packings of congruent objects in the Euclidean space. The most important objects of interest are hyperspheres, whose packings give rise to error-correcting communication protocols which are widely employed today. Since different packings might lead to protocols differing in efficiency, reliability, and fitness for a given purpose, our aim is to find, in some sense, the best possible packings. The main tools we use is a family of highly symmetrical complex unit vectors.

Outline of Annual Research Achievements

6次の複素アダマール行列の構造特性を研究し、論文を書きました。島根大学で「Sets, Designs, and Graphs」といいう国際研究集会を開催しました(7月20-21日)。早稲田大学で「早稲田離散数理」といいう研究集会で距離集合に関する発表をしました(3月16日)。今後の研究に向けた準備を始めました。つまり、研究はおおむね順調に進展しています。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

研究についての論文が採用されました。

Strategy for Future Research Activity

研究計画に沿って進めていく予定です。近い将来、6次の複素アダマール行列と距離集合について研究する予定です。2つの研究論文を準備中であり、セビリアで開催される国際研究集会で発表する予定です。

Report

(1 results)
  • 2024 Research-status Report
  • Research Products

    (4 results)

All 2025 2024 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results) (of which Invited: 1 results) Funded Workshop (1 results)

  • [Int'l Joint Research] HUN-REN Alfred Renyi Inst. of Math.(ハンガリー)

    • Related Report
      2024 Research-status Report
  • [Journal Article] A characterization of complex Hadamard matrices appearing in families of MUB triplets2024

    • Author(s)
      Matszangosz Akos K.、Szollosi Ferenc
    • Journal Title

      Designs, Codes and Cryptography

      Volume: 92 Issue: 12 Pages: 4313-4333

    • DOI

      10.1007/s10623-024-01503-w

    • Related Report
      2024 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Some new results on maximum few-distance sets2025

    • Author(s)
      Szollosi Ferenc
    • Organizer
      2025 早稲田離散数理研究集会
    • Related Report
      2024 Research-status Report
    • Invited
  • [Funded Workshop] Sets, Designs, and Graphs2024

    • Related Report
      2024 Research-status Report

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Published: 2024-04-05   Modified: 2025-12-26  

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