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  1. I'm a computational geometer/topologist/graphophile with more general interests in algorithms, data structures, and lower bounds. I also have a growing interest in computer science education research, especially in understanding how students learn to design algorithms.

    • Research

      Jeff Erickson's Research My main research interests are...

    • Graduate Algorithms

      by Jeff Erickson 🔥1st edition, June 2019 🔥 (Amazon links:...

    • Computational Geometry

      Jeff Erickson (jeffe@illinois.edu) Lectures Wed Fri...

    • Family

      Jeff Erickson's home page. My beautiful wife Kim Whittlesey...

  2. 1st edition, June 2019. This web page contains a free electronic version of my self-published textbook Algorithms, along with other lecture notes I have written for various theoretical computer science classes at the University of Illinois, Urbana-Champaign since 1998.

  3. Articles 1–20. ‪Professor of Computer Science, University of Illinois, Urbana-Champaign‬ - ‪‪Cited by 6,268‬‬ - ‪Algorithms‬ - ‪data structures‬ - ‪computational geometry‬ -...

  4. This textbook grew out of a collection of lecture notes that I wrote for various algorithms classes at the University of Illinois at Urbana-Champaign, which I have been teaching about once a year since January 1999.

    • Education
    • Biography
    • Academic Positions
    • Teaching Statement
    • Research Statement
    • Research Interests
    • Books Authored Or Co-Authored
    • Selected Articles in Journals
    • Articles in Conference Proceedings
    • Conferences Organized Or Chaired
    Ph.D., Computer Science, University of California, Berkeley, July 1996
    M.S., Information and Computer Science, University of California, Irvine, June 1992
    B.A., Computer Science and Mathematical Sciences (double major), Rice University, May 1987

    I have been a faculty member in the Department of Computer Science since 1998 and a full professor since 2010; I was named a Sohaib and Sara Abbasi Professor in 2020. I have published over 100 technical papers in computational geometry, computational topology, graph algorithms, and related topics at the intersection of computer science and mathemat...

    Sohaib and Sara Abbasi Professor, University of Illinois at Urbana-Champaign, 2020-present
    Professor, University of Illinois at Urbana-Champaign, 2010-present
    Associate Professor (tenured), University of Illinois at Urbana-Champaign, 2004-2010
    Assistant Professor, University of Illinois at Urbana-Champaign, 1998-2004

    I primarily teach courses in algorithms. My free algorithms textbook, along with an extensive archive of related course materials, is available at http://jeffe.cs.illinois.edu/teaching/algorithms/. Please send me bug reports!

    For a complete overview of my research activities, please see my publication archive at http://jeffe.cs.illinois.edu/pubs/.

    Algorithms, data structures, and lower bounds
    Computational and discrete geometry and topology
    Computer science education

    Jeff Erickson. Algorithms. 1st edition, xiv+454 pages, June 2019. A self-published open-access textbook.

    Jeff Erickson and Patrick Lin. Planar and toroidal morphing made easier. Journal of Graph Algorithms and Applications27(2):95–118, 2023. special issue of invited papers from the 29th International...
    Jeff Erickson, Gabriel Nivasch, and Junyan Xu, Fusible numbers and Peano arithmetic. Logical Methods in Computer Science18(3:6), 2022, special issue of invited papers from the 36th Annual ACM/IEEE...
    Mikkel Abrahamsen, Jeff Erickson, Irina Kostitsyna, Maarten Löffler, Tillman Miltzow, Jérôme Urhausen, Jordi Vermeulen, and Giovanni Viglietta. Chasing puppies: Mobile beacon routing on closed curv...
    Jeff Erickson and Patrick Lin. A toroidal Maxwell-Cremona-Delaunay correspondence. To appear in Journal of Computational Geometry, 12(2):55–85, 2021, special special issue of invited papers from th...
    Jeff Erickson, Gabriel Nivasch, and Junyan Xu. Fusible numbers and Peano Arithmetic.  Proceedings of the 36th Annual ACM/IEEE Symposium on Logic in Computer Science, 1–13, 2021. Distinguished paper.
    Erin Chambers, Jeff Erickson, Patrick Lin, and Salman Parsa. How to morph graphs on the torus. Proceedings of the 32nd Annual ACM-SIAM Symposium on Discrete Algorithms, 2759–2778, 2021.
    Hsien-Chih Chang, Marcos Cossarini, and Jeff Erickson. Lower bounds for electrical reduction on surfaces. Proceedings of the 35th International Symposium on Computational Geometry, 25:1–25:16, 2019.
    Jeff Erickson, Kyle Fox, and Luvsandondov Lkhamsuren. Holiest minimum-cost paths and flows in surface graphs. Proceedings of the 50th Annual ACM Symposium on Theory of Computing, 1319–1332, 2018
    Program committee, 39th International Symposium on Computational Geometry (SOCG 2023)
    Program committee, 33rd Annual ACM-SIAM Symposium on Discrete Algorithms (SODA 2022)
    Program committee, 2019 Symposium on Simplicity in Algorithms (2019)
    Program committee, 34th International Symposium on Computational Geometry (SOCG 2018) — submission forbidden
  5. I mostly teach graduate and advanced undergraduate courses in algorithms, which is why I thought I was qualified to write an algorithms textbook. All of these links used to work, honest. Spring 2024: CS 225: Data Structures, honors section [tentative] Fall 2023: CS/ECE 374: Algorithms & Models of Computation.

  6. Spurred by changes of our undergraduate theory curriculum, I undertook a major revision of my notes in; this book consists of a subset of my revised notes on the most fundamental course material, mostly reflecting the algorithmic content of our new required junior-level theory course. Prerequisites.