Uri M. Ascher Professor, Computer Science Office: CS/CICSR 223 Phone: 604-822-4907 Fax: 604-822-5485 e-mail: ascher at cs.ubc.ca

Teaching September-December, 2012

• CPSC 520 -- Numerical Methods for Time-Dependent Differential Equations

Recent books

• 

  Uri Ascher and Chen Greif, A First Course in Numerical Methods , SIAM, 2011.

  
  This is an undergraduate or beginning graduate introductory textbook on numerical methods.
  

  Errata
  

  Supplementary material including matlab programs and errata

• 

  Uri Ascher, Numerical Methods for Evolutionary Differential Equations, SIAM, 2008.

  
  This is a graduate textbook on numerical methods for time-dependent PDEs and ODEs.

  
  Solutions/additional examples
  

  Errata
  

• For my other books click Books

Recent publications and preprints

• F. Roosta-Khorasani, K. van den Doel and U. Ascher (2013):
  Data completion and stochastic algorithms for PDE inversion problems with many measurements
• K. van den Doel, U. Ascher and E. Haber (2012):
  The lost honour of l2-based regularization.
• F. Roosta-Khorasani, K. van den Doel and U. Ascher (2012):
  Stochastic algorithms for inverse problems involving PDEs and many measurements
• H. Huang, S. Wu, M. Gong, D. Cohen-Or, U. Ascher and R. Zhang, ACM Trans. Graphics (2013):
  Edge-aware point set resampling
• K. van den Doel and U. Ascher, SIAM J. Scient. Comput. (2012), DOI: 10.1137/110826692:
  Adaptive and stochastic algorithms for EIT and DC resistivity problems with piecewise constant solutions and many measurements.
• K. van den Doel and U. Ascher, J. Scientific Computing (2011), DOI10.1007/s10915-011-9521-3 :
  The chaotic nature of faster gradient descent methods
• K. van den Doel, U. Ascher and D. Pai, Inverse Problems 27 (2011), 025008:
  Source localization in electromyography using the inverse potential problem
• U. Ascher, J. Appl. Numer. Math. (2012), DOI: 10.1016/j.apnum.2012.06.025
  Surprising computations
• H. Huang, D. Li, R. Zhang, U. Ascher and D. Cohen-Or, ACM Trans. Graphics (SIGGRAPH Asia) (2009):
  Consolidation of unorganized point clouds for surface reconstruction
  See also the project home page
• K. van den Doel, U. Ascher and A. Leitao, J. Scient. Comput. 43 (2009), 44-66:
  Multiple level sets for piecewise constant surface reconstruction in highly ill-posed problems
• H. Huang and U. Ascher, Math. Programming to appear (accepted 2010):
  Faster gradient descent and the efficient recovery of images
• U. Ascher, K. van den Doel, H. Huang and B. F. Svaiter, M2AN 43 (2009), 689-708:
  Gradient descent and fast artificial time integration
• K. van den Doel, U. Ascher and D. Pai, Inverse Problems 24 (2008), 065010:
  Computed myography: three dimensional reconstruction of motor functions from surface EMG data
• H. Huang and U. Ascher, SIAM J. Scient. Comput. 31 (2008), 74-93:
  Surface mesh smoothing, regularization and feature detection
• K. van den Doel and U. Ascher, IEEE Trans. Audio, Speech and Language Processing16 (2008), 1163-1172:
  Real-time numerical solution of Webster's equation on a non-uniform grid
• H. Huang and U. Ascher, Inverse Problems 24 (2008), 034003:
  Fast Denoising of Surface Meshes with Intrinsic Texture
• For my other publications click Publications

It's never too late

• Talk on You Tube
• Conference July 15-17, 2011
  Subgroup picture: Ray Spiteri, Hui Huang, Eldad Haber, me, John Stockie, Chen Greif, Dhavide Aruliah, David Moulton, Sebastian Reich, Steve Ruuth, Ping Lin
• SIAM Fellow
• CAIMS Research Prize

• University of British Columbia

• Computer Science Department

• Scientific Computing Laboratory

• Applied Mathematics

Travel photos