Eigenschemes and the Jordan canonical form

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• 作者：Hirotachi Abo^a ; ^{abo@uidaho.edu" class="auth_mail" title="E-mail the corresponding author} ; David Eklund^b ; ^{daek@kth.se" class="auth_mail" title="E-mail the corresponding author} ; Thomas Kahle^c ; ^{thomas.kahle@ovgu.de" class="auth_mail" title="E-mail the corresponding author} ; Chris Peterson^d ; ^{peterson@math.colostate.edu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：primary ; 15A18 ; secondary ; 13C40 ; 13P10 ; 14M12 ; 15A21 ; 15A22
• 刊名：Linear Algebra and its Applications
• 出版年：2016
• 出版时间：1 May 2016
• 年：2016
• 卷：496
• 期：Complete
• 页码：121-151
• 全文大小：550 K

文摘

We study the eigenscheme of a matrix which encodes information about the eigenvectors and generalized eigenvectors of a square matrix. The two main results in this paper are a decomposition of the eigenscheme of a matrix into primary components and the fact that this decomposition encodes the numeric data of the Jordan canonical form of the matrix. We also describe how the eigenscheme can be interpreted as the zero locus of a global section of the tangent bundle on projective space. This interpretation allows one to see eigenvectors and generalized eigenvectors of matrices from an alternative viewpoint.