TY - JOUR T1 - On the reduction of a complex matrix to triangular or diagonal by consimilarity AU - T. Jiang & M. Wei JO - Numerical Mathematics, a Journal of Chinese Universities VL - 2 SP - 107 EP - 112 PY - 2006 DA - 2006/05 SN - 15 DO - http://doi.org/ UR - https://global-sci.org/intro/article_detail/nm/8019.html KW - AB - Two $n\times n$ complex matrices $A$ and $B$ are said to be consimilar if ${S^{-1}}A\overline S=B$ for some nonsingular $n\times n$ complex matrix $S$. This paper, by means of real representation of a complex matrix, studies problems of reducing a given $n\times n$ complex matrix $A$ to triangular or diagonal form by consimilarity, not only gives necessary and sufficient conditions for contriangularization and condiagonalization of a complex matrix, but also derives an algebraic technique of reducing a matrix to triangular or diagonal form by consimilarity.