Nico Van Cleemput

Ghent University

Department of applied mathematics, computer science and statistics

Krijgslaan 281 - S9 - WE02

B-9000 Gent

Belgium

nico.vancleemput@gmail.com

Ghent University

Department of applied mathematics, computer science and statistics

Krijgslaan 281 - S9 - WE02

B-9000 Gent

Belgium

nico.vancleemput@gmail.com

#### Studies

- 2001 - 2006 : Master of Science in Mathematics, Ghent University, Belgium.
- 2007 - 2012 : PhD in Computer Science, Ghent University, Belgium

#### Work

- August 2006 - September 2007 : co-worker of GrInvIn-project at Ghent University
- October 2007 - September 2013: Research assistent at Ghent University
- November 2013 - December 2014: Research Assistant (postdoc) at University of West Bohemia
- September 2014 - September 2020: Post-doctoral assistant at Ghent University

#### Teaching

I teach / have taught the following courses

**Programming (I)**(Java) (exercises for the bachelors computer science, mathematics, physics and geography) (2007 - 2012)**Programming (II)**(Java) (exercises for the bachelors computer science) (2007 - 2013)**Computer science**(VBA and use of MS Office) (exercises for the bachelors biochemistry/biotechnology, chemistry, geology and geography) (2007 - 2011)**Programming**(Python) (exercises for the bachelors biochemistry/biotechnology, chemistry, geology and geography) (2011 - 2013)**Programming (I)**(Java) (exercises for the bachelors computer science, mathematics and physics) (2014 - 2015)**Analysis I**(for the bachelors computer science) (2015 - 2016)**Algorithms and Data-structures 2**(exercises for the bachelors computer science) (2015 - 2020)**Calculus**(for the bachelors computer science) (2017 - 2020)**Structure generation**: a four-part course on structure generation taught at University of West-Bohemia during 2014-2015.

#### Thesis students

Students I supervised or co-supervised.- Pieter Goetschalckx (2014 - 2020)
- Thomas De Praetere, M.S. (2015 - 2016): Drie-dimensionale symmetrische inbedding van grafen
- Karen Hilgert, M.S. (2016 - 2017): Algoritmes voor het testen van printplaten
- Emiel Ergo, M.S. (2016 - 2017): Nanocaps uit fullerenen
- Simon Van den Eynde, M.S. (2017 - 2018): Boundary length of patches with faces of size at most six
- Wouter Van Steenberge, M.S. (2018 - 2019): Restoring Pentagon Clusters in Goldberg Operations
- Seppe Bilcke, M.S. (2019 - 2021)
- Heidi Van den Camp, M.S. (2019 - 2020)
- Thibaut Vermeulen, M.S. (2019 - 2020)
- Lars Lowie (2019 - present)

- Simon Crevals, M.S. (2009 - 2010): Communicatienetwerk voor het GPS III systeem
- Jasper Souffriau, M.S. (2012 - 2013): Hamiltoniaanse cykels in triangulaties
- Annelies Cuvelier, M.S. (2014 - 2015): Grenzen voor het aantal Hamiltoniaanse cykels in triangulaties

#### Research interest

- Generation of structures in chemistry and mathematics
- Combinatorial geometry
- Tilings
- Mathematical conjecturing
- Development of tools for graph theory
- General (graph) generation algorithms
- Graph theory
- Hamiltonicity and related properties
- Plane and embedded graphs

#### Publications

- G. Brinkmann, T. Tucker, N. Van Cleemput,
*On the genera of polyhedral embeddings of cubic graphs*, submitted. - P. Brooks, D. Edwards, C.E. Larson, and N. Van Cleemput,
*Conjecturing-Based Computational Discovery of Patterns in Data*, arXiv preprint, submitted. - N. Van Cleemput, C. T. Zamfirescu,
*Hamiltonian cycles and 1-factors in 5-regular graphs*, arXiv preprint, submitted. - O.-H. S. Lo, J. M. Schmidt, N. Van Cleemput, C. T. Zamfirescu,
*Shortness parameters of polyhedral graphs with few distinct vertex degrees*, submitted. - I. Fabrici, M. Timkov, T. Madaras, N. Van Cleemput, C. T. Zamfirescu,
*Non-hamiltonian graphs in which every edge-contracted subgraph is hamiltonian*, submitted. - N. Van Cleemput,
*Generation of Delaney-Dress graphs*, submitted. - N. Bushaw, J. Chen, H. LaFayette, C. E. Larson, N. Van Cleemput, Conjectured Bounds for the Independence Number of a Graph, submitted.
- P. Brooks, D. Edwards, C.E. Larson, and N. Van Cleemput, Automated Conjecturing IV: Scientific Discovery and Classification, submitted.
- N. Bushaw, C.E. Larson, N. Van Cleemput, Automated Conjectures for Graph Hamiltonicity, submitted.
- G. Brinkmann, N. Van Cleemput,
*4-connected polyhedra have at least a linear number of hamiltonian cycles*, to appear in European Journal of Combinatorics. - A. P. Burger, J. P. de Wet, M. Frick, N. Van Cleemput, C. T. Zamfirescu,
*Planar Hypohamiltonian Oriented Graphs*, to appear in Journal of Graph Theory. - K. Coolsaet, P. Goetschalckx, N. Van Cleemput,
*Local Orientation-Preserving Symmetry Preserving Operations on Polyhedra*, Discrete Mathematics, 344(1), 2021 (DOI). - P. Goetschalckx, N. Van Cleemput, K. Coolsaet,
*Generation of Local Symmetry-Preserving Operations on Polyhedra*, Ars Mathematica Contemporanea**18**(2), 2020, pp. 223-239 (link/DOI). - A. Bradford, J. K. Day, L. Hutchinson, B. Kaperick, C. E. Larson, M. Mills, D. Muncy, N. Van Cleemput,
*Automated Conjecturing II: Chomp and Reasoned Game Play*, Journal of Artificial Intelligence Research (JAIR) 68, 2020, pp. 447-461 (DOI). - O.-H. S. Lo, J. M. Schmidt, N. Van Cleemput, C. T. Zamfirescu,
*Shortness Coefficient of Cyclically 4-Edge-Connected Cubic Graphs*, The Electronic Journal of Combinatorics 27, Iss. 1 (2020) Article Number P1.43. - N. Vandersickel, E. Van Nieuwenhuyse, N. Van Cleemput, J. Goedgebeur, M. El Haddad, J. De Neve, A. Demolder, T. Strisciuglio, M. Duytschaever and A.V. Panfilov,
*Directed Networks as a Novel Way to Describe and Analyze Cardiac Excitation: Directed Graph Mapping*, Frontiers in Physiology, 10:1138, 14 pages, 2019 (DOI). - J. Goedgebeur, K. Ozeki, N. Van Cleemput, G. Wiener,
*On the minimum leaf number of cubic graphs*, Discrete Mathematics, 342(11):3000-3005, 2019 (arXiv | DOI). - N. Van Cleemput,
*Hamiltonian-connectedness of triangulations with few separating triangles*, Contributions to Discrete Mathematics, 14 (1), 2019, pp. 71-79 (link | DOI). - G. Brinkmann, K. Ozeki, N. Van Cleemput,
*Types of triangle in plane Hamiltonian triangulations and applications to domination and k-walks*, Ars Mathematica Contemporanea 17(1), 2019, pp. 51-66 (link). - N. Van Cleemput, C. T. Zamfirescu,
*Regular Non-Hamiltonian Polyhedral Graphs*, Applied Mathematics and Computation, 338, 2018, pp. 192-206 (DOI). - K. Ozeki, N. Van Cleemput, C. T. Zamfirescu,
*Hamiltonian properties in plane graphs with few 3-cuts - a survey*, Discrete Mathematics 341 (9), 2018, pp. 2646-2660 (DOI). - L. Hutchinson, V. Kamat, C. E. Larson, S. Mehta, D. Muncy, and N. Van Cleemput,
*Automated Conjecturing VI: Domination Number of Benzenoids*, MATCH Commun. Math. Comput. Chem.,**80**(3), 2018, pp. 821-834 (link). - G. Brinkmann, J. Souffriau, N. Van Cleemput,
*On the number of hamiltonian cycles in triangulations with few separating triangles*, Journal of Graph Theory**87**(2), 2018, pp. 164-175 (DOI). - C.E. Larson, N. Van Cleemput,
*Automated Conjecturing I: Fajtlowicz's Dalmatian Heuristic Revisited (Extended Abstract)*, Proceedings of the 2017 International Joint Conference on Artificial Intelligence (IJCAI-17), Melbourne. - C.E. Larson, N. Van Cleemput,
*Automated Conjecturing III: Property-relations conjectures*, Annals of Mathematics and Artificial Intelligence,**81**(3), 2017, pp. 315-327 (DOI). - N. Bašić, G. Brinkmann, P.W. Fowler, T. Pisanski, N. Van Cleemput,
*Sizes of Pentagonal Clusters in Fullerenes*, Journal of Mathematical Chemistry**55**(8), 2017, pp. 1669-1682 (DOI). - G. Brinkmann, J. Souffriau, N. Van Cleemput,
*On the strongest form of a theorem of Whitney for hamiltonian cycles in plane triangulations*, Journal of Graph Theory**83**(1), 2016, pp. 78-91 (DOI). - C.E. Larson, N. Van Cleemput,
*Automated Conjecturing I: Fajtlowicz's Dalmatian Heuristic Revisited*, Artificial Intelligence**231**, 2016, pp. 17-38. - T. Kaiser, M. Saumell, N. Van Cleemput,
*10-Gabriel graphs are Hamiltonian*, Information Processing Letters**115**, 2015, pp. 877-881 (DOI). - G. Brinkmann, C.E. Larson, J. Souffriau, N. Van Cleemput,
*Construction of planar 4-connected triangulations*, Ars Mathematica Contemporanea**9**(2), 2015, pp. 145-159 (link). - I. Althöfer, J.K. Haugland, K. Scherer, F. Schneider, N. Van Cleemput,
*Alternating Plane Graphs*, Ars Mathematica Contemporanea**8**(2), 2015, pp. 337-363 (link). - Y. Akama, N. Van Cleemput,
*Spherical tilings by congruent quadrangles: Forbidden cases and substructures*, Ars Mathematica Contemporanea**8**(2), 2015, pp. 297-318 (link). - G. Brinkmann, J. Goedgebeur, N. Van Cleemput,
*The history of the generation of cubic graphs*, International Journal of Chemical Modeling, 5(2-3), 2013, pp. 67-89. - C.E. Larson, N. Van Cleemput,
*Forcing independence*, Croat. Chem. Acta**86**(4), 2013, pp. 469-475 (DOI), (link) or (direct link) - G. Brinkmann, N. Van Cleemput, T.Pisanski,
*Generation of various classes of trivalent graphs*, Theoretical Computer Science**502**, 2013, pp. 16-29 (DOI). - G. Brinkmann, N. Van Cleemput,
*Classification and Generation of Nanocones*, Discrete Applied Mathematics**159**(15), 2011, pp. 1528-1539. - G. Brinkmann, O. Delgado Friedrichs, S. Lisken, A. Peeters, N. Van Cleemput,
*CaGe - a Virtual Environment for Studying Some Special Classes of Plane Graphs - an Update*, MATCH Commun. Math. Comput. Chem.,**63**(3), 2010, pp. 533-552 (link). - G. Brinkmann, O. Delgado-Friedrichs, E.C. Kirby, N. Van Cleemput,
*A Catalogue of Periodic Fully-Resonant Azulene-Transitive Azulenoid Tilings Analogous to Clar Structures*, Croat. Chem. Acta**82**(4), 2009, pp. 781-789 (link) or (direct link) - A. Peeters, K. Coolsaet, G. Brinkmann, N. Van Cleemput, V. Fack,
*GrInvIn in a Nutshell*, Journal of Mathematical Chemistry**45**, 2009, pp. 471-477 (DOI)

#### PhD dissertation

On 21 September 2012 I defended my PhD with the title "Generation of structures in chemistry and mathematics". You can find the dissertation on the website of Ghent University at this link.#### Talks

- Educational innovation day of Ghent University (Ghent, Belgium, 10/05/2007) (Dutch): Abstract/Slides
- 6th Cologne-Twente Workshop on Graphs and Combinatorial Optimization (Enschede, Netherlands, 29-31/05/2007): Plenary talk with Gunnar Brinkmann: Abstract/Slides
- MATH / CHEM / COMP (Verbania, Italy, 10-13/06/2008): Toroidal Azulenoids: Abstract/Slides
- (Informal) Workshop on Structural and Computational Graph Theory (Ghent, Belgium, 20/06/2008): Toroidal Azulenoids: Abstract/Slides
- Colloquium on Combinatorics (Magdeburg, Germany, 13-14/11/2008): Toroidal Azulenoids: Abstract/Slides
- 8th Cologne-Twente Workshop on Graphs and Combinatorial Optimization (Paris, France, 02-04/06/2009): Nanocones: A classification result in chemistry: Abstract/Slides
- MATH / CHEM / COMP (Dubrovnik, Croatia, 08-13/06/2009): Nanocones: A classification result in chemistry: Abstract/Slides
- Colloquium on Combinatorics (Magdeburg, Germany, 13-14/11/2009): Nanocones: A classification result in chemistry: Abstract/Slides
- MATH / CHEM / COMP (Dubrovnik, Croatia, 07-12/06/2010): CaGe: A virtual environment for studying some special classes of plane graphs: Abstract/Slides
- 8th French Combinatorial Conference (Orsay, France, 28/06/2010 - 02/07/2010): Generation of generalized 3-regular graphs: Abstract/Slides
- Computers in Scientific Discovery 5 (Sheffield, UK, 20-23/07/2010): Generation of generalized 3-regular graphs: Abstract/Slides
- Colloquium on Combinatorics (Saarbrücken, Germany, 11-13/11/2010): Generation of generalized 3-regular graphs: Abstract/Slides
- CanaDAM (Victoria, Canada, 31/05/2011-03/06/2011): CaGe: A virtual environment for studying some special classes of plane graphs: Abstract/Slides
- Informal mini-workshop (Ghent, Belgium, 08/09/2011): Generation of Delaney-Dress symbols: Slides
- Colloquium on Combinatorics (Magdeburg, Germany, 11-12/11/2011): Generation of Delaney-Dress symbols: Abstract/Slides
- ICCAM 2012 - International Congress on Computational and Applied Mathematics (Ghent, Belgium, 09-13/07/2012): Nanocones: A classification result in chemistry: Abstract/Slides
- Computers in Scientific Discovery 6 (Portoroz, Slovenia, 21-25/08/2012): Generation of Delaney-Dress symbols: Abstract/Slides
- Informal workshop (Ghent, Belgium, 30-31/08/2012): Spherical tilings by congruent quadrangles (black board presentation)
- PhD defense (Ghent, Belgium, 21/09/2012): Slides
- Colloquium on Combinatorics (Berlin, Germany, 16-17/11/2012): Spherical tilings by congruent quadrangles: Abstract/Slides
- CanaDAM (St.-John's, Canada, 10/06/2013-13/06/2013): Spherical tilings by congruent quadrangles: Abstract/Slides
- GraphDay@ULB (Brussels, Belgium, 02/10/2013): Hamiltonian cycles in triangulations: Abstract/Slides
- Graph theory seminar (Pilsen, Czech Republic, 19/11/2013): Hamiltonian cycles in triangulations: Slides
- Graph theory seminar (Pilsen, Czech Republic, 25/02/2014): Structure generation: Slides
- ICGT 2014 (Grenoble, France, 30/06/2014 - 04/07/2014): On the strongest form of a theorem of Whitney for hamiltonian cycles in plane triangulations: Slides
- VCU Discrete Mathematics Seminar (Richmond, USA, 02/09/2014): On the strongest form of a theorem of Whitney for hamiltonian cycles in plane triangulations: Abstract/Slides/Handouts
- VCU Discrete Mathematics Seminar (Richmond, USA, 09/09/2014): Structure generation - a case study: Abstract/Slides/Handouts
- CAAGT seminar (Ghent, Belgium, 08/12/2014): Conway's Thrackle Conjecture (black board talk)
- CAAGT seminar (Ghent, Belgium, 27/03/2015, 03/04/2015, 17/04/2015): Generation of Delaney-Dress symbols (black board talk in three parts)
- Computers in Scientific Discovery 7 (Richmond, USA, 19-23/07/2015): Classification and generation of nanocones (invited talk): Slides
- Cycles and Colourings 2015 (Novy Smokovec, Slovakia, 07-11/09/2015): On the number of hamiltonian cycles in triangulations with few separating triangles: Slides
- Colloquium on Combinatorics (Ilmenau, Germany, 6-7/11/2015): On the strongest form of a theorem of Whitney for hamiltonian cycles in plane triangulations: Abstract/Slides/Handouts
- VCU Discrete Mathematics Seminar (Richmond, USA, 05/04/2016): On the number of hamiltonian cycles in triangulations with few separating triangles: Abstract/Slides/Handouts
- Ghent Graph Theory Workshop on Longest Paths and Longest Cycles (Ghent, Belgium, 1-2/08/2016): Connections between decomposition trees of 3-connected plane triangulations and hamiltonian properties (invited talk): Slides/Handouts
- Colloquium on Combinatorics (Paderborn, Germany, 4-5/11/2016): On the number of hamiltonian cycles in triangulations with few separating triangles: Abstract/Slides/Handouts
- CAAGT seminar (Ghent, Belgium, 28/04/2017): Type-0 triangles: Slides/Handouts
- Computers in Scientific Discovery 8 (Mons, Belgium, 23-25/08/2017): Non-hamiltonian and non-traceable regular 3-connected planar graphs: Abstract/Slides/Handouts
- Colloquium on Combinatorics (Paderborn, Germany, 24-25/11/2017): Non-hamiltonian and non-traceable regular 3-connected planar graphs: Abstract/Slides/Handouts
- Bucharest Graph Theory Workshop 2018 (Bucharest, Roumania, 15-17/08/2018): Non-hamiltonian and non-traceable regular 3-connected planar graphs (invited talk): Abstract/Slides/Handouts
- Colloquium on Combinatorics (Paderborn, Germany, 23-24/11/2018): Shortness coefficient of cyclically 4-edge-connected cubic graphs: Abstract/Slides/Handouts
- 10th Workshop on the Matthews-Sumner Conjecture and related Problems (Pilsen, Czech Republic, 14-19/04/2019): Shortness coefficient of cyclically 4-edge-connected cubic graphs: Abstract/Slides/Handouts
- Colloquium on Combinatorics (Paderborn, Germany, 20-21/11/2019): 4-connected polyhedra have at least a linear number of hamiltonian cycles: Abstract/Slides/Handouts
- CAAGT seminar (Ghent, Belgium, 28/10/2019): Hamiltonian cycles and 1-factors in 5-regular graphs (black board talk)
- CAAGT seminar (Ghent, Belgium, 17/01/2020): 10-Gabriel graphs are hamiltonian (black board talk)

#### Posters

#### Attended conferences

Only the conferences where I did not give a presentation- JavaPolis 2007 (Antwerp, Belgium, 12-14/12/2007)
- Devoxx 2008 (Antwerp, Belgium, 10-12/12/2008)
- FOSDEM 2009 (Brussels, Belgium, 7-8/02/2009)
- 5th meeting of the IAMC (Dubrovnik, Croatia, 13-16/06/2009)
- Devoxx 2009 (Antwerp, Belgium, 18-20/11/2009)
- FOSDEM 2010 (Brussels, Belgium, 6-7/02/2010)
- 6th meeting of the IAMC (Dubrovnik, Croatia, 5-6/06/2010)
- FOSDEM 2011 (Brussels, Belgium, 5-6/02/2011)
- FOSDEM 2012 (Brussels, Belgium, 4-5/02/2012)
- FOSDEM 2013 (Brussels, Belgium, 2-3/02/2013)
- GraphDay@Mons (Mons, Belgium, 5/03/2013)
- Winter school on Algorithm Design (Beroun, Czech Republic, 12/12/2013 - 15/12/2013)
- Mathematics in Chemistry meeting (Leipzig, Germany, 26/10/2016 - 28/10/2016)
- 9th Workshop on the Matthews-Sumner Conjecture and related Problems (Pilsen, Czech Republic, 09/04/2017 - 14/04/2017)

#### Organised conferences

- Ghent Graph Theory Workshop on Structure and Algorithms 2017 (together with Jan Goedgebeur and Carol T. Zamfirescu) (Ghent, Belgium, 16/08/2017 - 18/08/2017)
- Ghent Graph Theory Workshop on Structure and Algorithms 2019 (together with Jan Goedgebeur and Carol T. Zamfirescu) (Ghent, Belgium, 12/08/2019 - 14/08/2019)

#### Research visits

- visit to VCU to work with Craig Larson (Richmond, VA, United States, 22/08/2014 - 15/09/2014)
- visit to UCLA to work with Stan Schein (Los Angeles, CA, United States, 23/01/2016 - 05/02/2016)
- visit to VCU to work with Craig Larson (Richmond, VA, United States, 25/03/2016 - 15/03/2016)
- visit to UCLA to work with Stan Schein (Los Angeles, CA, United States, 19/01/2017 - 27/01/2017)
- visit to VCU to work with Craig Larson (Richmond, VA, United States, 03/09/2017 - 14/09/2017)
- visit to UCLA to work with Stan Schein (Los Angeles, CA, United States, 05/04/2018 - 18/04/2018)
- Salt Rock workshop to work on planar hypohamiltonian oriented graphs (Salt Rock, South-Africa, 26/01/2019 - 05/02/2019)
- visit to GERAD to work with Gilles Caporossi and Eglantine Camby (Montréal, Canada, 19/08/2019 - 25/08/2019)