eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences December 2009 21 3 647 654 jusps-A 1236 article A.R. Meenakshi (arm_meenakshi@yahoo.co.in) 1 S. Krishnamoorthy (drsk_01@yahoo.com 2 B. Vasudevan (vasudevb4u@gmail.com) 3 Dean of Mathematics and Computer Applications, Karpagam University, Coimbatore, Tamil Nadu (INDIA) Department of Methamatics Government Arts College (Autonomous) Kumbakonam -612001 (INDIA) Department of Mathematics Swami Dayananda College of Arts & Science Manjakkudi - 612 610 Tiruvarur Dist - Tamilnadu - INDIA ) <p style="text-align:justify">Necessary and sufficient conditions for the sums of Conjugate k-EP (Con-k-EP) matrices to be Con-k-EP are discussed. As an application it is shown that sum and parallel sum of parallel summable Con-k-EP matrices are Con-k-EP.</p> https://www.ultrascientist.org/paper/1236/ Conjugate k-EP matrix parallel summable matrices