Education:
- PhD in Mathematics, University of Michigan
- BS in Mathematics, Notre Dame
Research interests:
Computational Topology, 3-Manifold AlgorithmsPublications
Show allYajie Yan, David Letscher, and Tao Ju. “Voxel cores: efficient, robust, and provably good approximation of 3D medial axes”. In: ACM Trans. Graph. 37.4 (2018), 44:1–44:13. doi: 10.1145/3197517.3201396. url: http://doi.acm.org/10.1145/3197517.3201396. |
Hsien-Chih Chang, Jeff Erickson, David Letscher, Arnaud de Mesmay, Saul Schleimer, Eric Sedgwick, Dylan Thurston, and Stephan Tillmann. “Tightening Curves on Surfaces via Local Moves”. In: Proceedings of the Twenty-Ninth Annual ACM-SIAM Symposium on Discrete Algorithms, SODA 2018, New Orleans, LA, USA, January 7-10, 2018. 2018, pp. 121–135. doi: 10.1137/1.9781611975031.8. url: https://doi.org/10.1137/1.9781611975031.8. |
Yajie Yan, Kyle Sykes, Erin W. Chambers, David Letscher, and Tao Ju. “Erosion thickness on medial axes of 3D shapes”. In: ACM Trans. Graph. 35.4 (2016), 38:1–38:12. doi: 10.1145/2897824.2925938. url: http://doi.acm.org/10.1145/2897824.2925938. |
David Letscher and Kyle Sykes. “On the Stability of Medial Axis of a Union of Balls in the Plane”. In: Proceedings of the 28th Canadian Conference on Computational Geometry, CCCG 2016, August 3-5, 2016, Simon Fraser University, Vancouver, British Columbia, Canada. 2016, pp. 29–33. |
Yajie Yan, Tao Ju, David Letscher, and Erin W. Chambers. “Burning the medial axis”. In: Special Interest Group on Computer Graphics and Interactive Techniques Conference, SIGGRAPH ’15, Los Angeles, CA, USA, August 9-13, 2015, Posters Proceedings. 2015, 62:1. doi: 10.1145/2787626.2792658. url: http://doi.acm.org/10.1145/2787626.2792658. |
Erin Wolf Chambers and David Letscher. “Persistent Homology Over Directed Acyclic Graphs”. In: CoRR abs/1407.2523 (2014). arXiv: 1407.2523. url: http://arxiv.org/abs/1407.2523. |
Erin W. Chambers, Tao Ju, and David Letscher. “Medial Residues of Piecewise Linear Manifolds”. In: Proceedings of the 25th Canadian Conference on Computational Geometry, CCCG 2013, Waterloo, Ontario, Canada, August 8-10, 2013. 2013. url: http://cccg.ca/proceedings/2013/papers/paper%5C_13.pdf. |
David Letscher. “On persistent homotopy, knotted complexes and the Alexander module”. In: Innovations in Theoretical Computer Science 2012, Cambridge, MA, USA, January 8-10, 2012. 2012, pp. 428–441. doi: 10.1145/2090236.2090270. url: http://doi.acm.org/10.1145/2090236.2090270. |
Lu Liu, Erin W. Chambers, David Letscher, and Tao Ju. “Extended grassfire transform on medial axes of 2D shapes”. In: Computer-Aided Design 43.11 (2011), pp. 1496–1505. doi: 10.1016/j.cad.2011.09.002. url: https://doi.org/10.1016/j.cad.2011.09.002. |
Erin W. Chambers, David Letscher, Tao Ju, and Lu Liu. “Isotopic Fr?chet Distance”. In: Proceedings of the 23rd Annual Canadian Conference on Computational Geometry, Toronto, Ontario, Canada, August 10-12, 2011. 2011. url: http://www.cccg.ca/proceedings/2011/papers/paper88.pdf. |
L. Liu, Erin W. Chambers, David Letscher, and Tao Ju. “A simple and robust thinning algorithm on cell complexes”. In: Comput. Graph. Forum 29.7 (2010), pp. 2253–2260. doi: 10.1111/j.1467-8659.2010.01814.x. url: https://doi.org/10.1111/j.1467-8659.2010.01814.x. |
Michael H. Goldwasser and David Letscher. “A graphics package for the first day and beyond”. In: Proceedings of the 40th SIGCSE Technical Symposium on Computer Science Education, SIGCSE 2009, Chattanooga, TN, USA, March 4-7, 2009. 2009, pp. 206–210. doi: 10.1145/1508865.1508945. url: http://doi.acm.org/10.1145/1508865.1508945. |
Erin W. Chambers and David Letscher. “On the Height of a Homotopy”. In: Proceedings of the 21st Annual Canadian Conference on Computational Geometry, Vancouver, British Columbia, Canada, August 17-19, 2009. 2009, pp. 103–106. url: http://cccg.ca/proceedings/2009/cccg09%5C_27.pdf. |
Michael H. Goldwasser and David Letscher. “A python graphics package for the first day and beyond”. In: Proceedings of the 13th Annual SIGCSE Conference on Innovation and Technology in Computer Science Education, ITiCSE 2008, Madrid, Spain, June 30 - July 2, 2008. 2008, p. 326. doi: 10.1145/1384271.1384369. url: http://doi.acm.org/10.1145/1384271.1384369. |
Michael H. Goldwasser and David Letscher. “Teaching an object-oriented CS1 -: with Python”. In: Proceedings of the 13th Annual SIGCSE Conference on Innovation and Technology in Computer Science Education, ITiCSE 2008, Madrid, Spain, June 30 - July 2, 2008. 2008, pp. 42–46. doi: 10.1145/1384271.1384285. url: http://doi.acm.org/10.1145/1384271.1384285. |
Bryan Clair and David Letscher. “Optimal Strategies for Sports Betting Pools”. In: Operations Research 55.6 (2007), pp. 1163–1177. doi: 10.1287/opre.1070.0448. url: https://doi.org/10.1287/opre.1070.0448. |
Michael H. Goldwasser and David Letscher. “Teaching strategies for reinforcing structural recursion with lists”. In: Companion to the 22nd Annual ACM SIGPLAN Conference on Object-Oriented Programming, Systems, Languages, and Applications, OOPSLA 2007, October 21-25, 2007, Montreal, Quebec, Canada. 2007, pp. 889–896. doi: 10.1145/1297846.1297940. url: http://doi.acm.org/10.1145/1297846.1297940. |
Brandon Dybala, Brian Jennings, and David Letscher. “Detecting filtered cloning in digital images”. In: Proceedings of the 9th workshop on Multimedia & Security, MM&Sec 2007, Dallas, Texas, USA, September 20-21, 2007. 2007, pp. 43–50. doi: 10.1145/1288869.1288877. url: http://doi.acm.org/10.1145/1288869.1288877. |
Michael H. Goldwasser and David Letscher. “Teaching object-oriented programming in python”. In: Proceedings of the 12th Annual SIGCSE Conference on Innovation and Technology in Computer Science Education, ITiCSE 2007, Dundee, Scotland, UK, June 25-27, 2007. 2007, pp. 365–366. doi: 10.1145/1268784.1268937. url: http://doi.acm.org/10.1145/1268784.1268937. |
Michael H. Goldwasser and David Letscher. “Introducing network programming into a CS1 course”. In: Proceedings of the 12th Annual SIGCSE Conference on Innovation and Technology in Computer Science Education, ITiCSE 2007, Dundee, Scotland, UK, June 25-27, 2007. 2007, pp. 19–22. doi: 10.1145/1268784.1268793. url: http://doi.acm.org/10.1145/1268784.1268793. |
David Letscher. “Vector Weighted Anisotropic Voronoi Diagrams and Delaunay Traingulations”. In: Proceedings of the 19th Annual Canadian Conference on Computational Geometry, CCCG 2007, August 20-22, 2007, Carleton University, Ottawa, Canada. 2007, pp. 165–168. url: http://cccg.ca/proceedings/2007/07b2.pdf. |
David Letscher. “Reconstructing Submanifolds of Euclidean Space”. In: Proceedings of the 19th Annual Canadian Conference on Computational Geometry, CCCG 2007, August 20-22, 2007, Carleton University, Ottawa, Canada. 2007, pp. 65–68. url: http://cccg.ca/proceedings/2007/03b1.pdf. |
David Letscher and Jason Fritts. “Image Segmentation Using Topological Persistence”. In: Computer Analysis of Images and Patterns, 12th International Conference, CAIP 2007, Vienna, Austria, August 27-29, 2007, Proceedings. 2007, pp. 587–595. doi: 10.1007/978-3-540-74272-2“?73. url: https://doi.org/10.1007/978-3-540-74272-2%5C_73. |
Michael H. Goldwasser and David Letscher. “Providing students universal access to a centralized, graphical computing environment”. In: Proceedings of the 10th Annual SIGCSE Conference on Innovation and Technology in Computer Science Education, ITiCSE 2005, Caparica, Portugal, June 27-29, 2005. 2005, pp. 79–83. doi: 10.1145/1067445.1067470. url: http://doi.acm.org/10.1145/1067445.1067470. |
Herbert Edelsbrunner, David Letscher, and Afra Zomorodian. “Topological Persistence and Simplification”. In: Discrete & Computational Geometry 28.4 (2002), pp. 511–533. doi: 10.1007/s00454-002-2885-2. url: https://doi.org/10.1007/s00454-002-2885-2. |
Herbert Edelsbrunner, David Letscher, and Afra Zomorodian. “Topological Persistence and Simplification”. In: 41st Annual Symposium on Foundations of Computer Science, FOCS 2000, 12-14 November 2000, Redondo Beach, California, USA. 2000, pp. 454–463. doi: 10.1109/SFCS.2000.892133. url: https://doi.org/10.1109/SFCS.2000.892133. |
Greg Leibon and David Letscher. “Delaunay triangulations and Voronoi diagrams for Riemannian manifolds”. In: Proceedings of the Sixteenth Annual Symposium on Computational Geometry, Clear Water Bay, Hong Kong, China, June 12-14, 2000. 2000, pp. 341–349. doi: 10.1145/336154.336221. url: http://doi.acm.org/10.1145/336154.336221. |
Marshall W. Bern, David Eppstein, Pankaj K. Agarwal, Nina Amenta, L. Paul Chew, Tamal K. Dey, David P. Dobkin, Herbert Edelsbrunner, Cindy Grimm, Leonidas J. Guibas, John Harer, Joel Hass, Andrew Hicks, Carroll K. Johnson, Gilad Lerman, David Letscher, Paul E. Plassmann, Eric Sedgwick, Jack Snoeyink, Jeff Weeks, Chee-Keng Yap, and Denis Zorin. “Emerging Challenges in Computational Topology”. In: CoRR cs.CG/9909001 (1999). url: http://arxiv.org/abs/cs.CG/9909001. |
Courses
Show all| Fall 2020 | CSCI 3760 Artificial Intelligence | TR 12:45pm-2:00pm | ||||||||||
| Fall 2020 | CSCI 5740 Introduction to Artificial Intelligence | TR 12:45pm-2:00pm | ||||||||||
| Spring 2020 | CSCI 3760 Artificial Intelligence | TR 11:00am-12:15pm | ||||||||||
| Spring 2020 | CSCI 5740 Introduction to Artificial Intelligence | TR 11:00am-12:15pm | ||||||||||
| Spring 2019 | CSCI 1300 Introduction to Object-Oriented Programming | MTWF 10:00am-10:50am | ||||||||||
| Spring 2019 | CSCI 2050 / PHIL 3410 Computer Ethics | TR 11:00am-12:15pm | ||||||||||
| Fall 2018 | CSCI 3760 Artificial Intelligence | TR 12:45pm-2:00pm | ||||||||||
| Fall 2018 | CSCI 5050 Computing and Society | TR 11:00am-12:15pm | ||||||||||
| Fall 2018 | CSCI 5930 Artificial Intelligence | TR 12:45pm-2:00pm | ||||||||||
| Spring 2018 | CSCI 2050 / PHIL 3410 Computer Ethics | TR 11:00am-12:15pm | ||||||||||
| Fall 2017 | CSCI 3760 Artificial Intelligence | MWF 9:00am-9:50am | ||||||||||
| Fall 2017 | CSCI 5930 Artificial Intelligence | MWF 9:00am-9:50am | ||||||||||
| Fall 2017 | BCB 5300 Algorithms in Computational Biology | MWF 1:10pm-2:00pm | ||||||||||
| Spring 2017 | CSCI 2050 / PHIL 3410 Computer Ethics | TR 11:00am-12:15pm | ||||||||||
| Spring 2017 | CSCI 4930 Mobile Computing | TR 9:30am-10:45am | ||||||||||
| Fall 2016 | CSCI 1020 Introduction to Computer Science: Bioinformatics | MWF 2:10pm-3:00pm | ||||||||||
| Fall 2016 | BCB 5300 Algorithms in Computational Biology | MWF 12:00pm-12:50pm | ||||||||||
| Spring 2016 | CSCI 1020 Introduction to Computer Science: Bioinformatics | TR 9:30am-10:45am | ||||||||||
| Spring 2016 | CSCI 2050 / PHIL 3410 Computer Ethics | TR 11:00am-12:15pm | ||||||||||
| Fall 2015 | CSCI 1040 Introduction to Computer Science: Mobile Computing | MWF 12:00pm-12:50pm | ||||||||||
| Fall 2014 | CSCI 210 Data Structures | MWRF 10:00am-10:50am | ||||||||||
| Fall 2014 | CSCI 324 Operating Systems | MWF 1:10pm-2:00pm | ||||||||||
| Summer 2014 | CSCI 180 Data Structures | tba | ||||||||||
| Spring 2014 | CSCI 145 Scientific Programming | MWF 9:00am-9:50am | ||||||||||
| Spring 2014 | CSCI 408 High-Performance Computing | TR 2:15pm-3:30pm | ||||||||||
| Fall 2013 | CSCI 493 Special Topics--Mobile Comput | MWF 10:00am-10:50am | ||||||||||
| Spring 2013 | CSCI 180 Data Structures | MTWF 10:00am-10:50am | ||||||||||
| Fall 2012 | CSCI 324 Operating Systems | TR 9:30am-10:45am | ||||||||||
| Spring 2012 | CSCI 281 / PHIL 3410 Computer Ethics | TR 9:30am-10:45am | ||||||||||
| Spring 2012 | CSCI 493 High Performance Computing | TR 11:00am-12:15pm | ||||||||||
| Fall 2011 | CSCI 324 Operating Systems | TR 9:30am-10:45am | ||||||||||
| Fall 2011 | CSCI 462 Artificial Intelligence | MWF 9:00am-9:50am | ||||||||||
| Spring 2011 | CSCI 314 Algorithms | MWF 1:10pm-2:00pm | ||||||||||
| Fall 2010 | CSCI 290 Object-Oriented Software Design | TR 3:45pm-5:00pm | ||||||||||
| Fall 2010 | CSCI 293 Special Topics: Comp Ethics | TR 11:00am-12:15pm Course webpage | ||||||||||
| Spring 2010 | CSCI 145 Scientific Programming | MWF 1:10pm-2:00pm | ||||||||||
| Spring 2010 | CSCI 180 Data Structures | MTWF 10:00am-10:50am | ||||||||||
| Fall 2009 | CSCI 145 Scientific Programming | MWF 12:00pm-12:50pm Course webpage | ||||||||||
| Fall 2009 | CSCI 324 Operating Systems | TR 11:00am-12:10pm | ||||||||||
| Spring 2009 | CSCI 493 SpcTopics: Parallel Processing | MWF 12:00pm-12:50pm | ||||||||||
| Spring 2008 | CSCI 150 Intro Obj Orient Program | MTWF 9:00am-9:50am | ||||||||||
| Spring 2008 | CSCI 180 Data Structures | MTWF 2:10pm-3:00pm | ||||||||||
| Fall 2007 | CSCI 150 Intro Obj Orient Program | MTWF 9:00am-9:50am | ||||||||||
| Fall 2007 | CSCI 324 Operating Systems | TR 11:00am-12:10pm | ||||||||||
| Spring 2007 | CSCI 344 Programming Languages | TR 12:45pm-2:00pm | ||||||||||
| Fall 2006 | CSCI 493 Computer Security | TR 11:00am-12:15pm | ||||||||||
| Spring 2006 | CSCI 293 Linux System Administration | W 3:10pm-4:00pm | ||||||||||
| Spring 2006 | CSCI 425 Advanced Operating Systems | MWF 2:10pm-3:00pm | ||||||||||
| Fall 2005 | CSCI 150 Intro Obj Orient Program | MTWF 3:10pm-4:00pm Course webpage | ||||||||||
| Fall 2005 | CSCI 324 Operating Systems | TR 12:45pm-2:00pm | ||||||||||