The research work of the group primarily involve the study of contemporary problems in the electronic structure of materials using numerical and analytic techniques. Some of these work are carried out in close collaboration with experimentalists. Research work is devoted to the study of both weakly and strongly correlated materials where the dominant electronic energy is the kinetic energy and the Coulomb repulsion respectively. The study of weakly correlated systems is based on density functional theory (DFT) implemented in variety of basis sets. For strongly correlated systems, the main objective is to develop methods where chemical realism may be introduced in their description by deriving realistic Hubbard and Heisenberg Hamiltonians and solving them using numerical methods (Exact Diagonalization, QMC, DMFT ). In addition, research work is also carried out to develop efficient real space methods based on the recursion technique to study disordered systems, a recent interest has been on the study of superconductivity in disordered alloys.