People who study Numerical Analysis:

USA:

• Douglas Arnold -- the Director of IMA at Minesota.
• Richard E. Ewing -- Texas A&M University.
• J. Wang -- Colorado school of mines.

Frace

• J.M. Thomas

Italy

• Franco Brezzi

Canada

• Yanping Lin -- U. of Alberta.

Research groups:

• Center for Nonlinear Analysis -- Carnegie Mellon University.