Madabusi Santanam Raghunathan, Indian mathematician (Anantapur, Andhra Pradesh State 11 August 1941 –

One of the world’s leading researchers in algebraic groups and their discrete subgroups

Authored the Book Discrete Subgroups of Lie Groups (1972) a standard reference work in the area  

Solved Selberg conjecture for non-uniform lattices

Invited Lecturer, International Congress of Mathematicians (1970)

EPONYMY 

Raghunathan vanishing theorem

Raghunathan conjectures

Raghunathan criterion

Lubotzky-Mozes-Raghunathan theorem

Prasad-Raghunathan theorem

Raghunathan lemma