Announcements

  • Quiz 1 today at end of the class. 10 minutes, closed book.

  • HW2 Q1. My mean/median runtime is about 90ms.

  • UCLA IDRE’s JupyterHub webpage: http://jupyter.idre.ucla.edu. Contact Benjamin Winjum bwinjum@ucla.edu for any usage questions.

Last time

  • Memory hierarchy, looping order, avoid array allocation.

  • Triangular systems.

    Ken’s question on eigenvectors of a triangular system.

  • Gaussian elimination and LU decomposition.

Today

  • LU decomposition (cont’d).

  • Cholesky decomposition.