K. R. Parthasarathy is a professor emeritus of graph theory from the Department of Mathematics, Indian Institute of Technology Madras, Chennai. He received his Ph.D. (1966) in graph theory [1] from the Indian Institute of Technology Kharagpur. Parthasarathy is known for his work (with his student G. Ravindra) proving the special case of the strong perfect graph conjecture for claw-free graphs.[2] Parthasarathy guided and refereed Ph.D. students in graph theory, among them S. A. Choudum.[1] Parthasarathy wrote a book on graph theory, Basic Graph Theory (Tata McGraw-Hill, 1994).