Dr. Steven Chaplick

Teaching

Research Interests

My primary area of interest is algorithmic graph theory and my current research focuses on intersection representations of graphs, efficient methods for graph class recognition, and optimization problems on restricted graph classes. 

CV

(see: here for my full CV)

Postdoctoral Work:

  • Since Sept. 2015:
    Postdoc in the Chair of Computer Science I, Universität Würzburg.
  • Jan. 2014 - June 2015:
    Postdoc in the Algorithmic and Discrete Mathematics Group, TU Berlin. *
  • Feb. 2013 - Dec. 2013:
    Postdoc in the Department of Applied Mathematics, Charles University in Prague. *
  • Jan. 2012 - Jan. 2013:
    Visiting Researcher: Wilfrid Laurier University (Waterloo, Canada), Simon Fraser University (Vancouver, Canada), University of Toronto (Toronto, Canada), Haifa University (Haifa, Israel).

* These positions were supported by the EuroCores EUROGIGA project GraDR.

Studies:

  • Feb. 2008 - Jan. 2012:
    PhD in Computer Science at the University of Toronto (Advisor: Derek Corneil).
  • Sept. 2006 - Jan. 2008:
    M.Sc in Computer Science at the University of Toronto (Advisor: Derek Corneil).
  • Sept. 2001 - June 2006:
    B.Math double degree in Combinatorics & Optimization and Computer Science at the University of Waterloo.

 

 

Publications

2017

  • Catanzaro, D., Chaplick, S., Felsner, S., Halldórsson, B.V., Halldórsson, M.M., Hixon, T., Stacho, J.: Max point-tolerance graphs. Discrete Applied Mathematics. 216, 84--97 (2017).
     
  • Chaplick, S., Hell, P., Otachi, Y., Saitoh, T., Uehara, R.: Ferrers dimension of grid intersection graphs. Discrete Applied Mathematics. 216, 130--135 (2017).
     
  • Alam, M.J., Chaplick, S., Fijavz, G., Kaufmann, M., Kobourov, S.G., Pupyrev, S., Toeniskoetter, J.: Threshold-coloring and unit-cube contact representation of planar graphs. Discrete Applied Mathematics. 216, 2--14 (2017).
     

2016

  • Chaplick, S., Fleszar, K., Lipp, F., Ravsky, A., Verbitsky, O., Wolff, A.: Drawing Graphs on Few Lines and Few Planes. In: Hu, Y. and Nöllenburg, M. (eds.) Graph Drawing and Network Visualization - 24th International Symposium, GD 2016, Athens, Greece, September 19-21, 2016, Revised Selected Papers. p. 166--180. Springer (2016).
     
  • Angelini, P., Chaplick, S., Cornelsen, S., Da Lozzo, G., Di Battista, G., Eades, P., Kindermann, P., Kratochv\'il, J., Lipp, F., Rutter, I.: Simultaneous Orthogonal Planarity. In: Hu, Y. and Nöllenburg, M. (eds.) Graph Drawing and Network Visualization - 24th International Symposium, GD 2016, Athens, Greece, September 19-21, 2016, Revised Selected Papers. p. 532--545. Springer (2016).
     
  • Chaplick, S., Lipp, F., Park, J.-W., Wolff, A.: Obstructing Visibilities with One Obstacle. In: Hu, Y. and Nöllenburg, M. (eds.) Graph Drawing and Network Visualization - 24th International Symposium, GD 2016, Athens, Greece, September 19-21, 2016, Revised Selected Papers. p. 295--308. Springer (2016).
     
  • Cameron, K., Chaplick, S., Hoàng, C.\'inh T.: Edge intersection graphs of L-shaped paths in grids. Discrete Applied Mathematics. 210, 185--194 (2016).
     
  • Chaplick, S., Micek, P., Ueckerdt, T., Wiechert, V.: A note on concurrent graph sharing games. Integers. 16, Paper No. G1 (2016).
     
  • Chaplick, S., Guspiel, G., Gutowski, G., Krawczyk, T., Liotta, G.: The Partial Visibility Representation Extension Problem. In: Hu, Y. and Nöllenburg, M. (eds.) Graph Drawing and Network Visualization - 24th International Symposium, GD 2016, Athens, Greece, September 19-21, 2016, Revised Selected Papers. p. 266--279. Springer (2016).
     

2015

  • Chaplick, S., Fiala, J.\'i, van 't Hof, P., Paulusma, D., Tesar, M.: Locally constrained homomorphisms on graphs of bounded treewidth and bounded degree. Theor. Comput. Sci. 590, 86--95 (2015).
     

2014

  • Chaplick, S., Dorbec, P., Kratochv\'il, J., Montassier, M., Stacho, J.: Contact Representations of Planar Graphs: Extending a Partial Representation is Hard. In: Kratsch, D. and Todinca, I. (eds.) Graph-Theoretic Concepts in Computer Science - 40th International Workshop, WG 2014, Nouan-le-Fuzelier, France, June 25-27, 2014. Revised Selected Papers. p. 139--151. Springer (2014).
     
  • Chaplick, S., Stacho, J.: The vertex leafage of chordal graphs. Discrete Applied Mathematics. 168, 14--25 (2014).
     
  • Chaplick, S., Hell, P., Otachi, Y., Saitoh, T., Uehara, R.: Intersection Dimension of Bipartite Graphs. In: Gopal, T.V., Agrawal, M., Li, A., and Cooper, S.B. (eds.) Theory and Applications of Models of Computation - 11th Annual Conference, TAMC 2014, Chennai, India, April 11-13, 2014. Proceedings. p. 323--340. Springer (2014).
     

2013

  • Alam, M.J., Chaplick, S., Fijavz, G., Kaufmann, M., Kobourov, S.G., Pupyrev, S.: Threshold-Coloring and Unit-Cube Contact Representation of Graphs. In: Brandstädt, A., Jansen, K., and Reischuk, R. (eds.) Graph-Theoretic Concepts in Computer Science - 39th International Workshop, WG 2013, Lübeck, Germany, June 19-21, 2013, Revised Papers. p. 26--37. Springer (2013).
     
  • Chaplick, S., Kobourov, S.G., Ueckerdt, T.: Equilateral L-Contact Graphs. In: Brandstädt, A., Jansen, K., and Reischuk, R. (eds.) Graph-Theoretic Concepts in Computer Science - 39th International Workshop, WG 2013, Lübeck, Germany, June 19-21, 2013, Revised Papers. p. 139--151. Springer (2013).
     
  • Chaplick, S., Ueckerdt, T.: Planar Graphs as VPG-Graphs. J. Graph Algorithms Appl. 17, 475--494 (2013).
     
  • Chaplick, S., Fulek, R., Klav\'ik, P.: Extending Partial Representations of Circle Graphs. In: Wismath, S.K. and Wolff, A. (eds.) Graph Drawing - 21st International Symposium, GD 2013, Bordeaux, France, September 23-25, 2013, Revised Selected Papers. p. 131--142. Springer (2013).
     
  • Chaplick, S., Cohen, E., Morgenstern, G.: Stabbing Polygonal Chains with Rays is Hard to Approximate. Proceedings of the 25th Canadian Conference on Computational Geometry, CCCG 2013, Waterloo, Ontario, Canada, August 8-10, 2013. Carleton University, Ottawa, Canada (2013).
     
  • Chaplick, S., Fiala, J.\'i, van 't Hof, P., Paulusma, D., Tesar, M.: Locally Constrained Homomorphisms on Graphs of Bounded Treewidth and Bounded Degree. In: Gasieniec, L. and Wolter, F. (eds.) Fundamentals of Computation Theory - 19th International Symposium, FCT 2013, Liverpool, UK, August 19-21, 2013. Proceedings. p. 121--132. Springer (2013).
     
  • Cameron, K., Chaplick, S., Hoàng, C.\'inh T.: Edge Intersection Graphs of L-Shaped Paths in Grids. Electronic Notes in Discrete Mathematics. 44, 363--369 (2013).
     

2012

  • Chaplick, S., Ueckerdt, T.: Planar Graphs as VPG-Graphs. In: Didimo, W. and Patrignani, M. (eds.) Graph Drawing - 20th International Symposium, GD 2012, Redmond, WA, USA, September 19-21, 2012, Revised Selected Papers. p. 174--186. Springer (2012).
     
  • Chaplick, S., Jel\'inek, V.\'it, Kratochv\'il, J., Vyskocil, T.: Bend-Bounded Path Intersection Graphs: Sausages, Noodles, and Waffles on a Grill. In: Golumbic, M.C., Stern, M., Levy, A., and Morgenstern, G. (eds.) Graph-Theoretic Concepts in Computer Science - 38th International Workshop, WG 2012, Jerusalem, Israel, June 26-28, 2012, Revised Selcted Papers. p. 274--285. Springer (2012).
     

2011

  • Chaplick, S., Cohen, E., Stacho, J.: Recognizing Some Subclasses of Vertex Intersection Graphs of 0-Bend Paths in a Grid. In: Kolman, P. and Kratochv\'il, J. (eds.) Graph-Theoretic Concepts in Computer Science - 37th International Workshop, WG 2011, Teplá Monastery, Czech Republic, June 21-24, 2011. Revised Papers. p. 319--330. Springer (2011).
     

2010

  • Chaplick, S., Gutierrez, M., Lévêque, B., Tondato, S.B.: From Path Graphs to Directed Path Graphs. In: Thilikos, D.M. (ed.) Graph Theoretic Concepts in Computer Science - 36th International Workshop, WG 2010, Zarós, Crete, Greece, June 28-30, 2010 Revised Papers. p. 256--265 (2010).
     

Preprints / Tech Reports

2016

  • Chaplick, S., Toepfer, M., Voborn\'ik, J., Zeman, P.: On H-Topological Intersection Graphs. CoRR. abs/1608.02389, (2016).
     
  • Chaplick, S., Fleszar, K., Lipp, F., Ravsky, A., Verbitsky, O., Wolff, A.: The Complexity of Drawing Graphs on Few Lines and Few Planes. CoRR. abs/1607.06444, (2016).
     
  • Chaplick, S., Lipp, F., Park, J.-W., Wolff, A.: Obstructing Visibilities with One Obstacle. CoRR. abs/1607.00278, (2016).
     
  • Chaplick, S., De, M., Ravsky, A., Spoerhase, J.: Approximation Schemes for Geometric Coverage Problems. CoRR. abs/1607.06665, (2016).
     
  • Chaplick, S., Fleszar, K., Lipp, F., Ravsky, A., Verbitsky, O., Wolff, A.: Drawing Graphs on Few Lines and Few Planes. CoRR. abs/1607.01196, (2016).
     
  • Angelini, P., Chaplick, S., Cornelsen, S., Da Lozzo, G., Di Battista, G., Eades, P., Kindermann, P., Kratochv\'il, J., Lipp, F., Rutter, I.: Simultaneous Orthogonal Planarity. CoRR. abs/1608.08427, (2016).
     

2015

  • Cameron, K., Chaplick, S., Hoàng, C.\'inh T.: On the structure of (pan, even hole)-free graphs. CoRR. abs/1508.03062, (2015).
     
  • Catanzaro, D., Chaplick, S., Felsner, S., Halldórsson, B.V., Halldórsson, M.M., Hixon, T., Stacho, J.: Max Point-Tolerance Graphs. CoRR. abs/1508.03810, (2015).
     
  • Chaplick, S., Felsner, S., Hoffmann, U., Wiechert, V.: Grid Intersection Graphs and Order Dimension. (2015).
     
  • Chaplick, S., Guspiel, G., Gutowski, G., Krawczyk, T., Liotta, G.: The Partial Visibility Representation Extension Problem. CoRR. abs/1512.00174, (2015).
     

2014

  • Chaplick, S., Fiala, J.\'i, van 't Hof, P., Paulusma, D., Tesar, M.: Locally Constrained Homomorphisms on Graphs of Bounded Treewidth and Bounded Degree. CoRR. abs/1408.6676, (2014).
     
  • Chaplick, S., Micek, P., Ueckerdt, T., Wiechert, V.: A note on concurrent graph sharing games. (2014).
     

2013

  • Chaplick, S., Kobourov, S.G., Ueckerdt, T.: Equilateral L-Contact Graphs. CoRR. abs/1303.1279, (2013).
     
  • Chaplick, S., Fulek, R., Klav\'ik, P.: Extending Partial Representations of Circle Graphs. CoRR. abs/1309.2399, (2013).
     

2012

  • Chaplick, S., Jel\'inek, V.\'it, Kratochv\'il, J., Vyskocil, T.: Bend-Bounded Path Intersection Graphs: Sausages, Noodles, and Waffles on a Grill. CoRR. abs/1206.5159, (2012).
     
  • Cameron, K., Chaplick, S., Hoàng, C.\'inh T.: Edge Intersection Graphs of L-Shaped Paths in Grids. CoRR. abs/1204.5702, (2012).
     

2011

  • Chaplick, S., Stacho, J.: The vertex leafage of chordal graphs. CoRR. abs/1104.2524, (2011).