David Applegate | |
---|---|
Academic background | |
Education | University of Dayton (BS) Carnegie Mellon University (PhD) |
Doctoral advisor | Ravindran Kannan |
Academic work | |
Discipline | Computer science |
Sub-discipline | Convex volume approximation |
Institutions | Rice University AT&T Labs |
David L. Applegate is an American computer scientist known for his research on the traveling salesperson problem.
Applegate graduated from the University of Dayton in 1984, [1] and completed his doctorate in 1991 from Carnegie Mellon University,with a dissertation on convex volume approximation supervised by Ravindran Kannan. [2]
Applegate worked on the faculty at Rice University and at AT&T Labs before joining Google in New York City in 2016. [1] His work on the Concorde TSP Solver,described in a 1998 paper,won the Beale–Orchard-Hays Prize of the Mathematical Optimization Society, [3] [1] [ICM] and his book The traveling salesman problem with the same authors won the Frederick W. Lanchester Prize in 2007. [4] [TSP] He and Edith Cohen won the IEEE Communications Society's William R. Bennett Prize for a 2006 research paper on robust network routing. [5] [ToN] Another of his papers,on arithmetic without carrying,won the 2013 George Pólya Award. [6] [CMJ] In 2013,he was named an AT&T Fellow. [1]
With Guy Jacobsen and Daniel Sleator,Applegate was the first to computerize the analysis of the pencil-and-paper game,Sprouts. [7] [8]
CMU. | Applegate, David; Jacobson, Guy; Sleator, Daniel (1991), Computer analysis of Sprouts, Computer Science Tech. Report CMU-CS-91-144, Carnegie Mellon University [6] [CMJ] |
OJC. | Applegate, David; Cook, William (May 1991), "A computational study of the job-shop scheduling problem" (PDF), ORSA Journal on Computing, 3 (2): 149–156, doi:10.1287/ijoc.3.2.149 |
ICM. | Applegate, David; Bixby, Robert E.; Chvátal, Vašek; Cook, William J. (1998), "On the solution of traveling salesman problems", Proceedings of the International Congress of Mathematicians, Vol. III (Berlin, 1998) (PDF), Documenta Mathematica, pp. 645–656, MR 1648194, archived from the original (PDF) on 2017-07-13, retrieved 2017-08-04 |
TSP. | Applegate, David L.; Bixby, Robert E.; Chvátal, Vašek; Cook, William J. (2006), The traveling salesman problem: A computational study, Princeton Series in Applied Mathematics, Princeton, NJ: Princeton University Press, ISBN 978-0-691-12993-8, MR 2286675 [4] [9] |
ToN. | Applegate, David; Cohen, Edith (December 2006), "Making routing robust to changing traffic demands: Algorithms and evaluation", IEEE/ACM Transactions on Networking , 14 (6): 1193–1206, doi:10.1109/TNET.2006.886296, S2CID 27498169 [5] |
CMJ. | Applegate, David; LeBrun, Marc; Sloane, N. J. A. (2012), "Carryless arithmetic mod 10", The College Mathematics Journal , 43 (1): 43–50, arXiv: 1008.4633 , doi:10.4169/college.math.j.43.1.043, MR 2875555, S2CID 10952221 [6] |
In the theory of computational complexity, the travelling salesman problem (TSP) asks the following question: "Given a list of cities and the distances between each pair of cities, what is the shortest possible route that visits each city exactly once and returns to the origin city?" It is an NP-hard problem in combinatorial optimization, important in theoretical computer science and operations research.
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The Concorde TSP Solver is a program for solving the travelling salesman problem. It was written by David Applegate, Robert E. Bixby, Vašek Chvátal, and William J. Cook, in ANSI C, and is freely available for academic use.
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Edith Cohen is an Israeli and American computer scientist specializing in data mining and algorithms for big data. She is also known for her research on peer-to-peer networks. She works for Google in Mountain View, California, and as a visiting professor at Tel Aviv University in Israel.
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Defeng Sun is a Chinese applied mathematician and operations researcher. He holds the position of Chair Professor of Applied Optimization and Operations Research, and has been serving as the Head of Department of Applied Mathematics in The Hong Kong Polytechnic University (PolyU) since 2019. Sun had been the President of The Hong Kong Mathematical Society in 2020-2024.