Dr. William Kahan

Professor

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Biography

William M. Kahan is a Professor Emeritus at the University of California, Berkeley, where he has been a faculty member since 1969, focusing on topics in mathematics and its applications in computer science. He retired in 2008, leaving behind a legacy of significant contributions to error analysis and numerical computations, especially in the context of large matrices and computational algorithms. Kahan has been actively involved in the academic community, publishing numerous influential papers that address both theoretical and practical aspects of numerical methods, with a keen interest in applications such as the trajectory problems in mathematical physics. His work has garnered recognition and respect, showcasing his expertise in handling complex mathematical and computational challenges, making him a notable figure in his field.

Research Interests

Requirements for University of California, Berkeley

Doctorate Program
Requirements
GPA Requirement
Required:3
GRE Subject
Overall Score
Required:500
Overall
Required:500
TOEFL
Total
Required:90
IELTS
Overall
Required:7
Prerequisites
Bachelor's degree or recognized equivalent Preparation comparable to undergraduate major at Berkeley in Mathematics or Applied Mathematics 2 full years lower-division work (Calculus, Linear Algebra, Differential Equations, Multivariable Calculus) 8 one-semester upper-division courses (Real Analysis, Complex Analysis, Abstract Algebra, Linear Algebra)
Application Checklist
  • Graduate Application
  • Statement of Purpose
  • Personal History Statement
  • Three Letters of Recommendation
  • Unofficial Transcripts
  • C.V./Resume
  • Course and Textbook List
Specialization Notes

The Mathematics Subject GRE is required for the Fall 2026 admissions cycle. General GRE is optional.