Editing Tomaž Pisanski

{{Short description|Slovenian mathematician (born 1949)}}
{{Infobox scientist
| name = Tomaž Pisanski
| image = Tomaž Pisanski age 70 (cropped).jpg
| image_size = 
| alt = 
| caption = 
| birth_date = {{Birth date and age|1949|05|24|df=y}}
| birth_place = [[Ljubljana]], [[Socialist Federal Republic of Yugoslavia|Yugoslavia]]
| residence = 
| nationality = [[Slovenes|Slovene]]
| fields = [[Topological graph theory]], [[Algebraic graph theory]], [[Discrete mathematics]], [[Configuration (geometry)]].
| workplaces = [[University of Primorska]]
| alma_mater = [[University of Ljubljana]], [[Pennsylvania State University]]
| doctoral_advisor = [[Torrence Parsons]]
| doctoral_students = [[Vladimir Batagelj]]<br />[[Sandi Klavžar]]<br />[[Bojan Mohar]]
| notable_students = 
| website = 
}}
'''Tomaž (Tomo) Pisanski''' (born 24 May 1949 in [[Ljubljana]], [[Yugoslavia]], which is now in [[Slovenia]]) is a [[Slovenia]]n [[mathematician]] working mainly in [[discrete mathematics]] and [[graph theory]]. He is considered by many Slovenian mathematicians to be the "father of Slovenian discrete mathematics."<ref>{{Cite web|url=http://www.gregas.eu/elaboration-on-the-expertise-objectives-and-contributions|title=Elaboration on the expertise, objectives and contributions — Gregas|last=lea|website=www.gregas.eu|language=en|access-date=2019-04-23}}</ref>

==Biography==
As a high school student, Pisanski competed in the 1966 and 1967 [[International Mathematical Olympiad]]s as a member of the [[Socialist Federal Republic of Yugoslavia|Yugoslav]] team, winning a bronze medal in 1967.<ref>{{cite web|url=https://www.imo-official.org/participant_r.aspx?id=10005|title=Tomo Pisanski|work=International Mathematical Olympiad|access-date=2025-01-08}}</ref> 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.<ref>{{Cite web|url=http://stanislavpirnat.si/toma%C5%BE-pisanski|title=Pisanski Tomaž - Biografski koledar slovenskih matematikov, fizikov, astronomov|website=stanislavpirnat.si|access-date=2019-04-25}}</ref>

Currently, Pisanski is a professor of [[discrete mathematics|discrete]] and [[computation|computational mathematics]] and Head of the Department of Information Sciences and Technology at [[University of Primorska]] in [[Koper]].<ref>{{Cite web|url=https://www.famnit.upr.si/sl/o-fakulteti/oddelki|title=Oddelki - UP FAMNIT|website=www.famnit.upr.si|language=sl|access-date=2019-04-25}}</ref> 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|Institute of Mathematics, Physics and Mechanics]] (IMFM) in Ljubljana since 1980, and the leader of several IMFM research projects.<ref>{{Cite web|url=http://www.imfm.si/raziskave-in-projekti/raziskovalne-skupine/group.2007-04-29.7491730860/|title=Oddelek za teoretično računalništvo — IMFM|website=www.imfm.si|access-date=2019-04-25}}</ref> 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]].<ref>{{Cite web|url=http://www.gregas.eu/members/pl/tomaz-pisanski|title=Tomaž Pisanski — Gregas|last=lea|website=www.gregas.eu|language=en|access-date=2019-04-26}}</ref>  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 ==
Pisanski’s research interests span several areas of discrete and computational mathematics, including combinatorial configurations, [[abstract polytope]]s, maps on surfaces, [[chemical graph theory]], and the history of mathematics and science. In 1980 he calculated the [[genus]] of the [[Cartesian product of graphs|Cartesian product]] of any pair of connected, bipartite, ''d''-valent graphs using a method that was later called the ''White–Pisanski method''.<ref>J.L. Gross and [[Thomas W. Tucker|T.W. Tucker]], Topological graph theory, Wiley Interscience, 1987</ref> In 1982 [[Vladimir Batagelj]] and Pisanski proved that the [[Cartesian product of graphs|Cartesian product]] of a [[tree (graph theory)|tree]] and a [[cycle graph|cycle]] is [[Hamiltonian path|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.<ref name="DPP2005">
{{cite journal|last1=Dimakopoulos|first1=Vassilios V.|last2=Palios|first2=Leonidas|last3=Poulakidas|first3=Athanasios S.|year=2005|title=On the Hamiltonicity of the Cartesian product|journal=Inf. Proc. Lett|volume=96|issue=2|pages=49&ndash;53|doi=10.1016/j.ipl.2005.05.016}}</ref> With [[Brigitte Servatius]] he is the co-author of the book ''Configurations from a Graphical Viewpoint'' (2013).<ref name="PS2013">
{{citation|last1=Pisanski|first1=Tomaž|title=Configurations from a Graphical Viewpoint|url=https://books.google.com/books?id=bnh2zkuTZr4C|year=2013|publisher=Springer|isbn=9780817683641|last2=Servatius|first2=Brigitte}}.</ref>

== Selected publications ==

* Pisanski, T. Genus of Cartesian products of regular bipartite graphs, [[Journal of Graph Theory]] 4 (1), 1980, 31-42. [https://onlinelibrary.wiley.com/doi/abs/10.1002/jgt.3190040105 doi:10.1002/jgt.3190040105]
* Graovac, A.,  T. Pisanski. On the Wiener index of a graph, Journal of Mathematical Chemistry 8 (1),1991, 53-62. [https://link.springer.com/article/10.1007/BF01166923 doi:10.1007/BF01166923]
* Boben, M., B. Grunbaum, T. Pisanski, A. Zitnik, Small triangle-free configurations of points and lines, [[Discrete & Computational Geometry]] 35 (3), 2006, 405-427. [https://link.springer.com/article/10.1007/s00454-005-1224-9 doi:10.1007/s00454-005-1224-9]
* Conder, M., I. Hubard, T. Pisanski. Constructions for chiral polytopes, Journal of the London Mathematical Society 77 (1), 2007, 115-129. [https://londmathsoc.onlinelibrary.wiley.com/doi/abs/10.1112/jlms/jdm093 doi:10.1112/jlms/jdm093]
* Pisanski, T. A classification of cubic bicirculants, [[Discrete Mathematics (journal)|Discrete Mathematics]] 307 (3-5), 2007, 567-578. [https://www.sciencedirect.com/science/article/pii/S0012365X0600536X doi:10.1016/j.disc.2005.09.053]

== Professional life ==
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.<ref>{{Cite web|url=https://www.dmfa.si/ODrustvu/CastniClani.aspx|title=DMFA Slovenije|website=www.dmfa.si|access-date=2019-04-25}}</ref> He is a founding member of the [[International Academy of Mathematical Chemistry]], serving as its vice president from 2007 to 2011.<ref>{{Cite web|url=http://www.iamc-online.org/officers/index.htm|title=IAMC|website=www.iamc-online.org|access-date=2019-04-25}}</ref> In 2008, together with [[Dragan Marušič]], he founded ''[[Ars Mathematica Contemporanea]],'' the first international mathematical journal to be published in Slovenia.<ref>{{Cite news|url=http://www.primorske.si/novice/istra/slovenska-revija-med-najboljsimi-matematicnimi-rev|title=Slovenska revija med najboljšimi matematičnimi revijami na svetu|date=16 June 2016|work=primorske novice|access-date=24 April 2019}}</ref> In 2012 he was elected to the [[Academia Europaea]].<ref>[http://www.ae-info.org/ae/User/Pisanski_Tomaž at Academia Europaea], retrieved 2012-10-09.</ref> He was the president of the Slovenian Discrete and Applied Mathematics Society (SDAMS) from its conception until December 12, 2024. SDAMS is 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).<ref>{{Cite web|url=http://sdams.si/sl/novice|title=Novice|website=sdams.si|language=sl|access-date=2019-04-25}}</ref>

==Awards and honors==

In 2005, Pisanski was [[civil decoration|decorated]] with the '''Order of Merit (Slovenia)''',<ref name="order">{{Cite web|url=http://www.up-rs.si/up-rs/uprs.nsf/objave/Vrste-odlikovanj?OpenDocument|title=Predsednik Republike Slovenije &#124; Vrste odlikovanj|website=www.up-rs.si}}</ref> and in 2015 he received the Zois award for exceptional contributions to discrete mathematics and its applications.<ref>{{Cite web|url=http://www.mizs.gov.si/si/delovna_podrocja/direktorat_za_znanost/sektor_za_znanost/dejavnost/nagrade_in_priznanja_za_izjemne_dosezke_v_znanstveno_raziskovalni_in_razvojni_dejavnosti/2015/|title=2015 {{!}} Ministrstvo za izobraževanje, znanost in šport|website=www.mizs.gov.si|access-date=2019-04-23}}</ref> In 2016, he received the [[Donald Michie]] and [[Alan Turing]] Prize for lifetime achievements in [[Information science|Information Science]] in Slovenia.<ref>{{Cite web|url=https://is.ijs.si/?page_id=42|title=IS AWARDS|website=IS2019|language=en-US|access-date=2019-04-25}}</ref>

==References==
 <references />

==External links==
*[https://web.archive.org/web/20041130062818/http://www.ijp.si/ Pisanski's CV]
* {{cite web
|title=prof. dr. Tomaz Pisanski
|url=https://www.famnit.upr.si//en/about-faculty/staff/pisanski/
}}
*{{MathGenealogy|id=20387}}
*[http://www.iamc-online.org/members/index.htm International Academy of Mathematical Chemistry - List of Members]
*[http://en.ias.si/membership/regular-and-associate-members/ Slovenian Academy of Engineering - List of Members]
*[https://4d.rtvslo.si/arhiv/podobe-znanja/15701197 Images of Knowledge: Tomaž Pisanski - RTV radio interview]
*[https://www.8ecm.si/ 8th European Congress of Mathematics website]
*[https://conferences.matheo.si/event/29/ Maps ∩ Configurations ∩ Polytopes ∩ Molecules ⊆ Graphs: The mathematics of Tomaž Pisanski on the occasion of his 70th birthday]
*[https://amc-journal.eu/index.php/amc Ars Mathematica Contemporanea website]
*[http://sdams.si/sl/o-sdams Slovenian Society for Discrete and Applied Mathematics (SDAMS) website]

{{Authority control}}

{{DEFAULTSORT:Pisanski, Tomaz}}
[[Category:1949 births]]
[[Category:20th-century Slovenian mathematicians]]
[[Category:21st-century Slovenian mathematicians]]
[[Category:Graph theorists]]
[[Category:Living people]]
[[Category:Pennsylvania State University alumni]]
[[Category:Slovenian computer scientists]]
[[Category:Scientists from Ljubljana]]
[[Category:Mathematical chemistry]]
[[Category:University of Ljubljana alumni]]
[[Category:Members of Academia Europaea]]
[[Category:Academic staff of the University of Ljubljana]]
[[Category:Academic staff of the University of Primorska]]
[[Category:Academic staff of the University of Zagreb]]
[[Category:Academic staff of Montanuniversität Leoben]]
[[Category:California State University, Chico faculty]]
[[Category:Academic staff of Simon Fraser University]]
[[Category:Academic staff of the University of Auckland]]
[[Category:Colgate University faculty]]
[[Category:International Mathematical Olympiad participants]]
[[Category:Computational chemists]]
[[Category:Yugoslav mathematicians]]