Dr Ramanan has made significant contribution in differential geometry and algebraic geometry, some in collaboration with Dr M S Narasimhan. In differential geometry, his work with Prof. Narasimhan proving the existence of universal connections has been of relevance in the context of Yang-Mills theory in physics. In algebraic geometry, Prof. Ramanan's work concerns the study of the moduli space of vector bundles on an algebraic curve. The result that the moduli space of vector bundles on an algebraic curve has the same local deformation space as that of the curve, gives an elegant generalization of moduli spaces of vector bundles on a hyper-elliptic curve and on the non-existence of Poincare families for certain moduli varieties of vector bundles on curves has been widely acclaimed.