# Tomaž Pisanski

Tomaž Pisanski | |
---|---|

Born | |

Nationality | Slovene |

Alma mater | University of Ljubljana, Pennsylvania State University |

Scientific career | |

Fields | Topological graph theory, Algebraic graph theory, Discrete mathematics, Configuration (geometry). |

Institutions | University of Primorska |

Doctoral advisor | Torrence Parsons |

**Tomaž (Tomo) Pisanski** (born May 24, 1949 in Ljubljana, Slovenia) is a Slovenian mathematician working mainly in discrete mathematics and graph theory. He is considered by many Slovenian mathematicians to be the "father of Slovenian discrete mathematics."^{[1]}

## Contents

## Biography[edit]

As a high school student, Pisanski competed in the 1966 and 1967 International Mathematical Olympiads as a member of the Yugoslav team, winning a bronze medal in 1967,^{[2]} he studied at the University of Ljubljana where he obtained a B.Sc, M.Sc and PhD in mathematics, his 1981 PhD thesis in topological graph theory was written under the guidance of Torrence Parsons. He also obtained an M.Sc. in computer science from Pennsylvania State University in 1979.^{[3]}

Currently, Pisanski is a professor of discrete and computational mathematics and Head of the Department of Information Sciences and Technology at University of Primorska in Koper.^{[4]} In addition, he is a Professor at the University of Ljubljana Faculty of Mathematics and Physics (FMF), he has been a member of the Institute of Mathematics, Physics and Mechanics (IMFM) in Ljubljana since 1980, and the leader of several IMFM research projects.^{[5]} In 1991 he established the Department of Theoretical Computer Science at IMFM, of which he has served as both head and deputy head.

He has taught undergraduate and graduate courses in mathematics and computer science at the University of Ljubljana, University of Zagreb, University of Udine, University of Leoben, California State University, Chico, Simon Fraser University, University of Auckland and Colgate University.^{[6]} Pisanski has been an adviser for M.Sc and PhD students in both mathematics and computer science. Notable students include John Shawe-Taylor (B.Sc in Ljubljana), Vladimir Batagelj, Bojan Mohar, Sandi Klavžar, and Sandra Sattolo (M.Sc in Udine).

## Research[edit]

Pisanski’s research interests span several areas of discrete and computational mathematics, including combinatorial configurations, abstract polytopes, maps on surfaces, chemical graph theory, and the history of mathematics and science. In 1980 he calculated the genus of the Cartesian product of any pair of connected, bipartite, *d*-valent graphs using a method that was later called the *White–Pisanski method*.^{[7]} In 1982 Vladimir Batagelj and Pisanski proved that the Cartesian product of a tree and a cycle is Hamiltonian if and only if no degree of the tree exceeds the length of the cycle, they also proposed a conjecture concerning *cyclic Hamiltonicity* of graphs. Their conjecture was proved in 2005.^{[8]} With Brigitte Servatius he is the co-author of the book *Configurations from a Graphical Viewpoint* (2013).^{[9]}

## Professional life[edit]

From 1998-1999, Pisanski was chairman of the Society of Mathematicians, Physicists and Astronomers of Slovenia (DMFA Slovenije); he was appointed an honorary member in 2015,^{[10]} he is a founding member of the International Academy of Mathematical Chemistry, serving as its Vice President from 2007-2011.^{[11]} In 2008, together with Dragan Marušič, he founded *Ars Mathematica Contemporanea,* the first international mathematical journal to be published in Slovenia.^{[12]} In 2012 he was elected to the Academia Europaea,^{[13]} he is currently president of the Slovenian Discrete and Applied Mathematics Society (SDAMS), the first Eastern European mathematical society not wholly devoted to theoretical mathematics to be accepted as a full member of the European Mathematical Society (EMS).^{[14]}

## Awards and honors[edit]

In 2005, Pisanski was decorated with the **Order of Merit (Slovenia)**^{[15]}, and in 2015 he received the Zois award for exceptional contributions to discrete mathematics and its applications.^{[16]} In 2016, he received the Donald Michie and Alan Turing Prize for lifetime achievements in Information Science in Slovenia.^{[17]}

## References[edit]

**^**lea. "Elaboration on the expertise, objectives and contributions — Gregas".*www.gregas.eu*. Retrieved 2019-04-23.**^**[1]**^**"Pisanski Tomaž - Biografski koledar slovenskih matematikov, fizikov, astronomov".*stanislavpirnat.si*. Retrieved 2019-04-25.**^**"Oddelki - UP FAMNIT".*www.famnit.upr.si*(in Slovenian). Retrieved 2019-04-25.**^**"Oddelek za teoretično računalništvo — IMFM".*www.imfm.si*. Retrieved 2019-04-25.**^**lea. "Tomaž Pisanski — Gregas".*www.gregas.eu*. Retrieved 2019-04-26.**^**J.L. Gross and T.W. Tucker, Topological graph theory, Wiley Interscience, 1987**^**Dimakopoulos, Vassilios V.; Palios, Leonidas; Poulakidas, Athanasios S. (2005). "On the Hamiltonicity of the Cartesian product".*Inf. Proc. Lett*.**96**(2): 49–53. doi:10.1016/j.ipl.2005.05.016.**^**Pisanski, Tomaž; Servatius, Brigitte (2013),*Configurations from a Graphical Viewpoint*, Springer, ISBN 9780817683641.**^**"DMFA Slovenije".*www.dmfa.si*. Retrieved 2019-04-25.**^**"IAMC".*www.iamc-online.org*. Retrieved 2019-04-25.**^**"Slovenska revija med najboljšimi matematičnimi revijami na svetu".*primorske novice*. 16 June 2016. Retrieved 24 April 2019.**^**at Academia Europaea, retrieved 2012-10-09.**^**"Novice".*sdams.si*(in Slovenian). Retrieved 2019-04-25.**^**"Order of Merit (Red za zasluge)".**^**"2015 | Ministrstvo za izobraževanje, znanost in šport".*www.mizs.gov.si*. Retrieved 2019-04-23.**^**"IS AWARDS".*IS2019*. Retrieved 2019-04-25.

## External links[edit]

- Pisanski's CV
- "prof. dr. Tomaz Pisanski".
- Tomaž Pisanski at the Mathematics Genealogy Project
- International Academy of Mathematical Chemistry - List of Members
- Slovenian Academy of Engineering - List of Members
- Images of Knowledge: Tomaž Pisanski - RTV radio interview
- 8th European Congress of Mathematics website
- Maps ∩ Configurations ∩ Polytopes ∩ Molecules ⊆ Graphs: The mathematics of Tomaž Pisanski on the occasion of his 70th birthday
- Ars Mathematica Contemporanea website
- Slovenian Society for Discrete and Applied Mathematics (SDAMS) website

- 1949 births
- 20th-century mathematicians
- 21st-century mathematicians
- Graph theorists
- Living people
- Pennsylvania State University alumni
- Slovenian mathematicians
- Slovenian computer scientists
- People from Ljubljana
- Mathematical chemistry
- University of Ljubljana alumni
- Members of Academia Europaea
- University of Ljubljana faculty
- University of Primorska faculty
- University of Zagreb faculty
- Montanuniversität Leoben faculty
- California State University, Chico faculty
- Simon Fraser University faculty
- University of Auckland faculty
- Colgate University faculty
- International Mathematical Olympiad participants
- Computational chemists