Participated in 35 international
conferences (14 as invited speaker), obtained grant of Confucius Institute (China), 8 grants of
National Science Foundation of Italy (CNR), 4 grants of National
Science Foundation of Germany (Volkswagen Stiftung, DAAD, DFG,
DFG), 2 grants of National Research Council of USA (via Georgia
State University and University of Illinois), won a Cariplo
Fellowship (Polytechnic Institute of Milan, Italy), 15 research
grants of Troy University (USA), and was invited as a
Visiting Professor at the University of Illinois
(Urbana-Champaign, USA), University of Toronto (Canada),
University of Catania (Italy), University of Delaware (USA), the
Visiting Scientist at McMaster University (Hamilton, Canada),
Wilfrid Laurier University (Waterloo, Canada), and the Visiting
Member at Fields Institute (Toronto, Canada).
In USA, gave talks in Athens (Georgia), Kent (Ohio), San Diego (California), Urbana-Champaign (Illinois), Newark
(Delaware), Boca-Raton (Florida), Atlanta (Georgia), Columbus (Georgia), Dahlonega
(Georgia), Murfreesboro (Tennessee), Huntsville (Alabama), Rutgers
(New Jersey), Dothan (Alabama), Birmingham (Alabama), Auburn
(Alabama), Jacksonville (Alabama), Carrollton (Georgia), and Troy (Alabama).
In Italy, gave talks in Milan, Rome, Naples, Catania, Messina, Montesilvano,
Capomulini, D'Aquila, Costermano, Perugia, Sant'Alessio Siculo.
Also, gave talks in China (Beijing, Linyi), Germany (Duisburg, Dresden, Potsdam, Freiberg,
Aachen), France (Marseille), Malta (La Valetta), Holland
(Enschede), Hungary (Budapest), Poland (Zielona Gora), Romania
(Constantsa), Ukraine (Odessa), Moldova (Kishinev), Russia (Moscow).
Activity in Detail:
April 14-15, 2023. TroyMathFest 2023. Session moderator.
March 4, 2023. AACTM Meeting. Troy University, Troy, AL, USA. Title of presentation: From the history of mixed hypergraph coloring.
April 9, 2022. Invited speaker, TroyMathFest - 2022, undergraduate conference of Troy University.
March 7, 2022. As contributor, participation at 53rd Southeastern International Conference on Combinatorics, Graph Theory & Computing,
Boca Raton, Florida. Presentation title: Colorings of (p, q)-Uniform Complete Circular Mixed Hypergraphs. Presenter: Nicholas Newman.
October 21, 2021. Invited Zoom talk at the Discrete Mathematics seminar of Auburn University.
Title: "Recent results in Mixed Hypergraph Coloring: a survey".
October 29, 2020. Invited Zoom talk at the research seminar of Auburn University.
October 23-25, 2020. CLEP Calculus Committee Zoom meeting.
November 7, 2019. Invited talk at the research seminar of Auburn University.
Title: “Chromatic polynomials of graphs and hypergraphs: a survey, and some open problems.”
February 22, 2018. Invited talk at the research seminar of Auburn University. Title: “Mixed Hypergraph Coloring results obtained in Catania: a survey.”
September 29, 2017. Talk at the seminar of the Department of Mathematics, Troy University. Title: About my participation in HYGRADE, international conference in Italy.
October 8, 2015. Invited talk at the research seminar of Auburn University. Title: Mixed Hypergraph coloring: some open problems and new results.
July 2, 2015. Moldova State University. As a voting member of the Specialized Council of Republic of Moldova in Mathematical Cybernetics, participation in habilitation thesis defence of Dr. S. Cataranciuc (via Skype).
May 21, 2015. Moscow Witte University, International Scientific Conference "Control in Social and Economic Systems". Member of the organizing committee.
May 20, 2015. Talk at the research seminar of the Institute of Mathemativs and Informatics
of Moldavian Academy of Sciences, Chisinau, Republic of Moldova. Title: "Mixed Hypergraph Coloring: from origin in Moldova to the whole world."
May 7, 2015. Talk in Moscow Witte University, Moscow, Russia. Title: "Discrete Mathematics: why do we need it?".
April 2-12, 2015. Grant of Confucius Institute of Troy University and support of Beijing Normal University and Linyi University for research trip to China to visit Beijing Normal University and Linyi University.
April 8-10, 2015. Talks at the research seminar in Linyi University, Linyi, China. Title:
Some results and open problems in Mixed Hypergraph Coloring.
April 7, 2015. Talk in Linyi University, Linyi, China. Title: Mathematics: why do we love it?
April 2nd, 2015. Talk in Beijing Normal University, Beijing, China. Title: Coloring theory: history, results and open problems.
February 23, 2015. Invited talk at the research seminar of the Department of Mathematical Sciences, University of Delaware, Newark, DE. Title: 1912-2015: One hundred+ years to chromatic polynomial.
February 10, 2015. Invited talk at the research seminar of Auburn University. Title:
Hypertrees and cycles in hypergraphs.
January 16, 2015. Invited colloquium at the Department of Mathematics, University of West Georgia, Carrolton, GA. Title: Some results and open problems in hypergraph coloring.
October 30, 2014. Invited talk at the research seminar of Auburn University. Title:
Some open problems in hypergraph coloring.
March 29, 2014. Participation in Troy MathFest, undergraduate mathematics conference, Troy University, Montgomery, Alabama.
February 20, 2014. Invited talk at the research seminar of Auburn University. Title:
Coloring mixed hypergraphs: some new results and open problems.
October 29, 2013. Invited talk at research seminar of the Department of Mathematics and Statistics,
Auburn University. Title: "Hypergraph Coloring: a survey".
January 16, 2013. Talk at the seminar of the Department of Mathematics and Geomatics, Troy University.
Title: "1912 - 2012: one hundred years to Chromatic Polynomial".
October 17, 2012. Invited talk at the Colloquium of Columbus State University, Columbus, Georgia.
Title: "Coloring Mixed Hypergraphs: from Combinatorics to Philosophy."
September 26, 2012. Talk at seminar of the Department of Mathematics and Geomatics, Troy University.
Title: "Presentation about my participation in Combinatorics 2012".
August 30, 2012. Invited talk at research seminar of the Department of Mathematics and Statistics, Auburn University. Title: "1912 - 2012: one
hundred years to Chromatic Polynomial".
March 6, 8, 2012. Attending research seminar of the Department of Mathematics and Statistics, Auburn University. Speakers: Mariusz Meszka and Alex Rosa.
February 26-27, 2012. Participation at Atlanta Lecture Series in Combinatorics and Graph Theory V organized jointly by Emory University, Georgia Institute of Technology and Georgia State University, with support from the National Security Agency and the National Science Foundation, and Georgia Tech's program in Algorithms, Combinatorics, and Optimization [ACO].
October 20, 2011. Invited talk at the Department of Mathematics and Statistics, Auburn University, Auburn, AL. Title of the talk: "Stinson hill-climbing algorithm and its application in coloring of BSTS(25)". Joint talk with undergraduate student Christian Randolph.
October 18, 2011. Invited talk at the Department of Mathematics and Statistics, University of South Alabama, Mobile, AL. Title of the talk: "Coloring Theory: history, results and open problems."
March 26, 2011. Participation at TroyMathFest, Troy University undergraduate conference, Dothan campus.
Title of the talk: "Coloring Mixed Hypergraphs: uncolorability."
February 26-27, 2011. Participation at Atlanta Lecture Series in Combinatorics and Graph Theory II
organized jointly by Emory University, Georgia Institute of Technology and Georgia State University,
with support from the National Security Agency and the National Science Foundation,
and Georgia Tech's program in Algorithms, Combinatorics, and Optimization [ACO].
February 15, 2011. Attending research seminar of the Department of Mathematics and Statistics, Auburn University.
February 2, 2011. Talk at the research seminar of the Department of Mathematics,
Physics, Computer Science and Geomatics, Troy University. Title of the talk: "Mixed Hypergraph Colorings: research projects for
students".
January 25, 2011. Invited talk at the research seminar of the Department of Mathematics and Statistics, Auburn University.
Title of the talk: Coloring Mixed Hypergraphs: some results and open problems.
September 1, 2010. Talk at the research seminar of the Department of Mathematics,
Physics, Computer Science and Geomatics, Troy University. Title of the talk: "Introduction to Hypergraphs".
February 6th, 2010. Talk at Troy Mathfest, undergraduate conference of Troy University, Montgomery campus,
Alabama. Title of the talk: "Lucia Gionfriddo and her contribution to mixed hypergraph coloring."
October 21, 2009. Talk at the research seminar of the Department of Biological & Environmental Sciences,
Troy University. Title of the talk: "Bioinformatics as a new discipline for unraveling Genetics".
January - May, 2010. Research Grant (time release) of Troy University: submitting a NSF RUI Grant Proposal.
September 22, 2009. Invited talk at the research seminar of the Department of Mathematics and Statistics, Auburn University.
Title of the talk: presentation of two new textbooks: "Introduction to Graph Theory" and "Introduction to Graph and Hypergraph Theory".
Contents, main ideas, features and methodology.
August 26, 2009. Talk at the research seminar of the Department of Mathematics, Troy University. Title of the talk:
Official presentation of two new textbooks: "Introduction to Graph Theory" and "Introduction to Graph and Hypergraph Theory".
August - December 2009. Research Grant (time release) of Troy University “Graphs, Hypergraphs and Block Designs”.
February 28, 2009. Invited Lewis-Parker lecture at the annual meeting of AACTM, University of Jacksonville, Jacksonville, AL.
Title of the talk: "Graph Coloring: history, results and open problems".
February 20, 2009. Invited colloquium at the Department of Computer Science, Kent State University,
Kent, OH. Title of the talk: "Graph Coloring: history, generalizations, algorithms and open problems".
October 07, 2008. Invited talk at the research seminar of the Department of Mathematics
and Statistics, Auburn University. Title of the talk: "Coloring Theory: history, results
and open problems".
July 1-31, 2008. Summer research grant of Troy
University "Some problems in mixed hypergraph coloring".
June 23-28, 2008. As a main speaker, participation at
Combinatorics 2008,
the International conference on pure and applied combinatorics and its connections with Geometry, Graph Theory and Algebra.
February 26, 2008. Invited talk at the research seminar of the Department of Mathematics
and Statistics, Auburn University. Title of the talk: "Some recent results and open
problems in mixed hypergraph coloring".
January 6-9, 2008 Joint Mathematics Meetings, San Diego, CA. Invited talk at the
SIAM Mini-symposium on Graph Coloring and Partitioning. Title of the talk:
"Recent results and open problems in mixed hypergraph
coloring."
October 8-14, 2007. Research trip to Catania (Italy) for scientific collaboration
supported by the research grant of University of Catania and Ministry of Education of Italy.
July 23-30, 2007. Resarch trip to Veszprem (Hungary) for scientific collaboration supported by Troy University and Department of Computer Science of the University of Pannonia (Hungary).
July 1-31, 2007. Summer research grant of Troy University "Introduction to Graph and
Hypergraph Theory".
February 7, 2007. Talk at the research seminar of the Department
of Mathematics and Physics, Troy University. Title of the talk:
"Open problems in mixed hypergraph coloring".
January- May 2007. Research Grant (course release) of Troy University “Introduction to Graph and Hypergraph Theory”.
September 15, 2006. Talk at the seminar of the Department of Mathematics and Physics, Troy University. Title of the talk: "Why I am writing another book on Graph Theory".
April 18, 2006. Invited talk at the seminar of the Department of Mathematics and Statistics, Auburn University. Title of the talk: "On quasi-triangulated graphs."
March 17, 2006. Alabama Academy of Sciences, session at Troy University. Title of the talk "The history of the most famous error in Graph Theory".
March 4, 2006, Troy MathFest, Troy, Alabama. Title of the talk
"Splitting-contraction as a generalization of connection-contraction."
September 02, 2005. Seminar of the Department of Mathematics and
Physics, Troy University. Title of the talk: "Modeling with Mixed
Hypergraphs".
July 29, 2005. Participation in Faculty/Staff Troy University Gala Convocation.
June 1 - 30, 2005: Summer Research Grant of Troy University.
May 12-14, 2005, Huntsville, Alabama. Participation at 18th Cumberland Conference on Combinatorics, Graph Theory, and Computing with talk "On Quasi-Triangulated Graphs".
April 18, 2005. 2004-2005 Distinguished Scholar Award by the Honor Society of
Phi Kappa Phi Troy University Chapter 129.
April 12, 2005. Seminar of the Department of Mathematics and Physics, Troy University. Title of the talk: "Introduction to Coloring Theory".
September 27, 2004, Troy, Alabama. Talk at the research seminar of the Department of Math and Physics (TSU): "About my participation at the International Conference Combinatorics 2004 which took place September 12-18, 2004 in Italy".
September 12-18, 2004, Catania - Capomulini, Italy (Sicily). Invited speaker and scientific committee member, International Conference Combinatorics 04,
Catania - Capomulini, Italy.
August 31, 2004, Troy, Alabama. Talk at the research seminar of the Department of Math and Physics (TSU): “Uncolorable Mixed Hypergraphs: Why the Concept of Natural Number is Contradictory.”
June, 2004: Summer research Grant of Troy University.
May 20-22, 2004, Middle Tennessee State University, Murfreesboro, Tennessee.
Participation at 17th Cumberland Conference on Combinatorics, Graph Theory, and Computing with talk "Coloring Mixed Hypergraphs: results and open problems".
March 04, 2004: Talk at
Math Fest, Troy State University: "List colorings without ... lists."
February 10, 2004. Talk "Chordal graphs and chromatic polynomials", research seminar of the Department of Mathematics, Troy State University.
November 13, 2003, invited talk at the research seminar of the Department of Discrete and Statistical Sciences, Auburn University.
September 30 - October 4, 2003, invited speaker, ISGDA2003, International Symposium on Graphs, Designs and Applications, Messina, Italy.
August 26, September 2, 2003, talk at the research seminar, Department of Mathematics and Physics, Troy State University: Introduction to Mixed Hypergraph Coloring.
September 2002 - August 2003, visiting the Department of Mathematical Sciences,
University of Delaware.
January-May 2002, Visiting Professor, Department of Mathematics,
University of Illinois at Urbana-Champaign.
October 2001, Visiting Professor, University of Catania, Italy.
September 10-15, 2001,
23rd session of Odessa research seminar on Discrete Mathematics (organized by A.Zykov),
Odessa, Ukraine, with talk.
July 2-6, 2001, Third Discrete Mathematics and Theoretical Computer Science
conference (DMTCS'01), Constanta, Romania, invited speaker.
May - June 2001, Visiting Scientist, Department of Physics and Computing,
Wilfrid Laurier University, Waterloo, Ontario, Canada.
October - November 2000, Visiting Professor,
University of Catania.
January - March 2000, Visiting Member, Fields Institute, University of
Toronto (The Special Year in Graph Theory and Combinatorial Optimization).
February 2000, Visiting Scientist,
the Department of Mathematics,
McMaster University (Hamilton).
January 2000, Visiting Professor,
Department of Mathematics, University of Toronto.
March 1-2, 2000, Workshop
on Block Designs, Fields Institute (with talk).
February 14-19, 2000, Workshop
on Probabilistic Graph Theory, Fields Institute.
January 17-22, 2000, Workshop on Graph
Minors and Topological Graph Theory, Fields Institute.
November 8-10, 1999, invited speaker at
International Messina Workshop on Graphs and Combinatorics.
October - December, 1999, Dipartimento di Matematica,
Politecnico di Milano, Cariplo Fellow.
July 4-11, 1999, Conference "Paul Erdös and his
Mathematics", held in the memory of Paul Erdös, Budapest,
Hungary (supported by the Organizing Committee).
March 25, 1999, invited talk, Discrete
Mathematics Seminar in TU Zielona Gora, Poland.
February 18, 1999, Dresden Workshop on Graph
Theory (with talk).
January - April, 1999, visited TU-Dresden, Germany, supported
by DFG Grant on Colorings of Circular Mixed Hypergraphs.
October - November, 1998, Visiting Professor, Catania University.
October 1998, 4th Catania Workshop on Graphs and Combinatorics, invited speaker.
August 2-7, 1998, invited lecturer,
DIMACS Research and Educational Institute, Rutgers, The
State University of New Jersey.
August 3-5, 1998, visited RUTCOR, The State University of New
Jersey, invited by Professor Peter Hammer.
July 12-15, 1998, 9th SIAM Conference on
Discrete Mathematics, University of Toronto, Canada.
March - August, 1998, supported by Long-Term COBASE research
grant on Colorings of Mixed Hypergraphs, NSF and University of
Illinois at Urbana-Champaign.
March 20-21, 1998, 931st AMS Meeting at the
University of Louisville (section Combinatorics and Graph
Theory).
March 9-13, 1998, 29th
Southeastern International Conference on Combinatorics, Graph
Theory, and Computing, Florida Atlantic University, Boca Raton,
Florida, USA (with talk).
October - November 1997, Visiting
Professor, University of Catania.
September 24-28, 1997, invited speaker, Malta
International Workshop on Graphs and Combinatorics.
September 18--20, 1997, invited fellow,
International Conference Graph Drawing'97, Rome, Italy
May 25 - July 25, 1997, supported by DAAD, TU-Dresden, Germany
(with talks at research seminars in the Institut fur Algebra,
TU-Dresden, and in the Institut fur Theoretische Mathematik, TU
Bergakademie Freiberg).
May 18-20, 1997, 5th Twente
Workshop on Graph Theory and Combinatorial Optimization, Twente
University, The Netherlands (withn talk).
October - November 1996, Visiting
Professor, University of Catania.
In March - April, 1996, supported by short term COBASE
research grant and visited Georgia State University
and Auburn University (with talks).
September 3-8, 1995, 5th International Conference on Graphs and Combinatorics
Marseille-Luminy, France (with talk).
September - November 1995, Visiting
Professor, University of Catania; research seminars at the universities of
Catania, Messina, Neaples, Rome and the Polytechnic Institute of
Milano.
During 1994 - 1995, Scientific Research
Program "Volkswagen-Stiftung Project No.I/69041", University of
Duisburg, Germany. March 1995, March 1994, talks at
research seminar, University of Duisburg.
September - October 1995, Visiting
Professor, University of Catania
June 19-23, 1995, Workshop Graph
Concepts in Theoretical Computer Science, Aachen, Germany.
June 7-9, 1995, 4th Twente Workshop on Graphs and Combinatorial Optimization,
University of Twente, Enschede, The Netherlands (with talk).
March 19-24, 1995, International Conference "Carolus Magnus Colloquium" at Aachen,
Germany (with talk).
September - October 1994, Visiting
Professor, University of Catania
September 22-23, 1994, invited speaker, Catania Workshop on Combinatorics.
September 10-16, 1994, invited
lecturer, International Conference COMBINATORICS'94
(Roma-Montesilvano (PE), Italy).
May 30 - June 3, 1994, International
Conference on Discrete and Computational Geometry (Budapest,
Hungary).
September - November 1993, Visiting
Professor, University of Catania
September 26 - October 2, 1993, International Conference on Discrete Mathematics, University of Potsdam, Germany (with talk).