John N. Mather

John Norman Mather (June 9, 1942 – January 28, 2017) was an American mathematician. He was known for his work on singularity theory and Hamiltonian mechanics. He worked at Princeton University. He was born in Los Angeles, California. He studied at Princeton and Harvard University.
Mather died on January 28, 2017 in Princeton, New Jersey at the age of 74.