Thereafter he worked at NASA in Langley Field , the Courant Institute of Mathematical Sciences of NYU , Lawrence Livermore National Laboratory and the Princeton Plasma Physics Laboratory .
In 1953 he earned a PhD from New York University , under the supervision of Fritz John .
Thereafter he worked at NASA in Langley Field , the Courant Institute of Mathematical Sciences of New York University , Lawrence Livermore National Laboratory and the Princeton Plasma Physics Laboratory .
In 1953 he earned a PhD from New York University , under the supervision of Fritz John .