title: Chen Greif
text: # Chen Greif
  
  Chen Greif is a professor and former department head of computer science at the University of British Columbia. In March 2022 he was elected a fellow of the Society for Industrial and Applied Mathematics for "contributions to scientific computing, especially in numerical linear algebra and its applications."
  
  ## Education
  
  Greif attended Tel Aviv University, earning a bachelor's degree 1991 and a master's degree in 1994 in mathematics. He continued his education at the University of British Columbia, where he was awarded a PhD in Applied Mathematics in 1998. He was also a postdoctoral fellow at Stanford University from 1998 to 2000.
  
  ## Research
  
  His research is primarily concerning scientific computing and more specifically:
  
  * Matrix theory and analysis
  * Iterative solvers and preconditioning techniques for sparse linear systems
  * Saddle-point linear systems
  * Numerical solution of elliptic partial differential equations
  * Linear algebra aspects of constrained optimization problems
  
  ## Selected publication
  
  ### Books
  
  * Ascher UM, Greif C, editors. A first course in numerical methods. Society for Industrial and Applied Mathematics; 2011 June 22. Cited 166 times in Google Scholar
  
  ### Articles
  
  * Golub GH, Greif C. On solving block-structured indefinite linear systems. SIAM Journal on Scientific Computing. 2003;24(6):2076-92. Cited 181 times in Google Scholar
  * Avron H, Sharf A, Greif C, Cohen-Or D. ℓ1-sparse reconstruction of sharp point set surfaces. ACM Transactions on Graphics (TOG). 2010 Nov 5;29(5):1-2. Cited 145 times in Google Scholar
  * Golub GH, Greif C. An Arnoldi-type algorithm for computing page rank. BIT Numerical Mathematics. 2006 Dec 1;46(4):759-71. Cited 121 times in Google Scholar
  * Greif C, Schötzau D. Preconditioners for the discretized time‐harmonic Maxwell equations in mixed form. Numerical Linear Algebra with Applications. 2007 May;14(4):281-97.Cited 114 times in Google Scholar
  