A note on the equality of rank and trace for an idempotent matrix
作者：
Highlights：
•
摘要
The equality of rank and trace for an idempotent matrix is established by means of elementary matrix factorizations. The proof is substantially simpler than most found in the literature.
论文关键词：Oblique projector,Matrix factorization
论文评审过程：Available online 5 February 2011.
论文官网地址：https://doi.org/10.1016/j.amc.2011.02.001
