Rchr
J-GLOBAL ID:200901065388291748   Update date: Aug. 18, 2021

TOYONAGA KENJI

トヨナガ ケンジ | TOYONAGA KENJI
Affiliation and department:
Job title: 准教授
Research field  (2): Applied mathematics and statistics ,  Basic mathematics
Papers (19):
  • 豊永憲治. 数学の遠隔授業の実践と学生の状況について. 日数教高専・大学部会論文誌. 2021. 27
  • Kenji Toyonaga, Charles R. Johnson. The Effect of Perturbation of an Off-diagonal Entry Pair on the Geometric Multiplicity of an Eigenvalue. Linear algebra and its applications. 2021. 615. 112-142
  • Charles R. Johnson, Carlos M. Saiago, Kenji Toyonaga. Change in vertex status after removal of another vertex in the general setting. Linear algebra and its applications. 2021. 612. 128-145
  • Kenji Toyonaga, Charles R. Johnson. Classification of edges in a general graph associated with the change in multiplicity of an eigenvalue. Linear and Multilinear Algebra. 2021. 69. 10. 1803-1812
  • Kenji Toyonaga, Charles. R. Johnson, Carlos M. Saiago. The change in multiplicity of an eigenvalue due to adding or removing edges. Linear Algebra and its Applications. 2019. 560. 86-99
more...
MISC (7):
  • 豊永憲治. 固有値によるグラフの辺と頂点の分類について. 日本数学教育学会誌, 臨時増刊,総会特集号. 2019. 101
  • Classification of edges associated with the change in multiplicity of an eigenvalue of a Hermitian matrix. 2018
  • 豊永憲治. 固有値の多重度とグラフの関連について. 日本数学教育学会誌, 臨時増刊,総会特集号. 2017. 99
  • 豊永憲治. プロジェクタを利用した授業の現状と教材作成. 日本数学教育学会誌, 臨時増刊,総会特集号. 2013. 95
  • 豊永憲治. グラフがtreeとなるHermitian matrixの多重固有値の包み込みについて. 日本応用数理学会年会講演予稿集. 2008. 259-263
more...
Lectures and oral presentations  (25):
  • Classification of edges in a general graph associated with the change in multiplicity of an eigenvalue.
    (2019)
  • 固有値によるグラフの辺と頂点の分類について
    (日本数学教育学会第101回大会 2019)
  • Classification of edges associated with the change in multiplicity of an eigenvalue of a Hermitian matrix
    (2018)
  • The position of classified edges due to the change in multiplicity of an eigenvalue in a tree.
    (The Japanese Conference on Combinatorics and its Applications 2018)
  • 固有値の多重度の変化による辺の分類
    (2018軽井沢グラフと解析研究集会 2018)
more...
Professional career (1):
  • 博士(数理学) (九州大学)
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