Email: sirahul@maths.iitd.ac.in 

    wrahulsingh@gmail.com

Mailing Address: Department of Mathematics, 

 Indian Institute of Technology Delhi, 

 Hauz Khas, New Delhi-110016, India

Office Address:   MZ 193, Main Building,

 Indian Institute of Technology Delhi, 

 Hauz Khas, New Delhi-110016, India