Mathematical Inequalities & Applications · Volume 11, Issue 4 Basic indexes and Aluthge transformation for 2 by 2 matrices 11-51 Pages 615-628 DOI 10.7153/mia-11-51 Downloads Short PDF Full PDF PNG Authors Toshiyuki Takasaki Keywords Aluthge transformation polar decompositions singular decompositions singular values Subject classes 15A60 15A18