eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences December 2009 21 3 795 798 jusps-A 1260 article On k - Normal matrices C. INDUMATHI 1 Department of Mathematics, Ramanujan Research, Centre Government Arts College (Autonomous) , Kumbakonam - 612 001 Tamil Nadu (INDIA) <p>The concept of k-normal matrices is introduced. Charac-terizations of k-normal matrices are discussed.</p> <p>&nbsp;</p> https://www.ultrascientist.org/paper/1260/ Normal k-normal Moore penrose inverse.