1990 KARMESHU (b. 1949) PhD, Former Professor, School of Computer & System Sciences, J.N. University, New Delhi – 110067; Res. A-150, Deepali, Road No. 42, Pitampura, Delhi – 110034; Tel: (011) 667676 Ext. 396(O), 7273793(R); Email: ; Sp. Mathematical Modelling.