Course number: | MATH-GA 2830.002, CSCI-GA 2930.001 |
Semester: | Fall 2015 |
Time & Location: | Mon, 1:25pm - 3:15pm in WWH 512 |
Instructor: | Mike O'Neil (oneil@cims.nyu.edu) |
Office hours: | By appointment |
This course will be an introduction to several numerical methods known as "fast analysis-based algorithms," including fast multipole methods, butterfly algorithms, hierarchical matrix compression and fast direct solvers. These algorithms can be used to solve many of the PDEs governing classical mathematical physics, namely electromagnetics, acoustics, heat diffusion, and fluid dynamics. There are additional applications in signal processing and data analysis. Methods from potential theory, applied analysis, functional analysis, numerical linear algebra, complex analysis, and asymptotic analysis are central to the construction of almost all such algorithms.
There is no one textbook for this course. Instead, there will be continually updated lectures notes available here. These lecture notes will contain many useful references for each of the topics and algorithms covered in class. As they become relevant, original journal articles and textbooks will be listed below in the table of lecture topics.
Relevant code examples will be posted on gitlab.com/oneilm/fastalgorithms.
The grades in the course will be determined by a final project and presentation.
Important information for the course will appear below as necessary.
Below is an updated list of lecture topics along with any documents that were distributed, or relevant code.
Date | Topics | Materials |
---|---|---|
September 14 | Introduction & overview: The need for fast algorithms | |
September 21 | Tree codes and multipole expansions |
Jackson, Classical Electrodynamics Appel, 1985 Barnes & Hut, 1986 |
September 28 | Error estimation, multipole translations |
Wallace, Math. Anal. of Physical
Problems Greengard, 1987 Epton & Dembart, 1995 Sarin, et. al., 1998 |
October 5 | Local expansions, the fast multipole method |
Greengard, 1987 Lecture 4 written notes |
October 13 (Tues!!!) | Accelerating multipole translations |
Greengard & Rokhlin, 1997 Yarvin & Rokhlin, 1998 Gimbutas & Greengard, 2009 Lecture 5 written notes |
October 19 | The Helmholtz FMM |
Greengard, et. al., 1998 Darve, 2000 Cheng, et. al., 2006 Lecture 6 written notes |
October 26 | The Fast Fourier Transform | Briggs & Henson, The DFT |
November 2 | Non-Uniform Fast Fourier Transforms | Dutt & Rokhlin, 1993 Greengard & Lee, 2004 |
November 9 | Randomized linear algebra | Liberty, et. al., 2007 Halko, et. al., 2011 Martinsson lectures, 2014 Lecture 9 written notes |
November 16 | Kernel independent methods |
Gimbutas & Rokhlin, 2002 Ying, Biros, & Zorin, 2004 Fong & Darve, 2009 |
November 23 | Recursive skeletonization |
Martinsson & Rokhlin, 2007 Ho & Greengard, 2012 |
November 30 | Butterfly algorithms |
Michielssen & Boag, 1996 Candès, et. al., 2009 O'Neil, et. al., 2010 |
December 7 | Fast direct solvers |
George, 1973 Greengard, et. al., 2009 Martinsson School, 2014 |
December 14 | Project presentations |