**Zbigniew Piotrowski**

**Professor, Department of
Mathematics and Statistics**

**Youngstown**** State University**

**Youngstown****, OH 44555**

**(330) 941 3302**

**(330) 941 3170 FAX**

**E-mail: zpiotr@math.ysu.edu**

**http://people.ysu.edu/~zpiotrowski/**

**Professional Presentations **

May 2011, Department of Mathematics, Pomeranian Academy, Slupsk, Poland “On a property of all real-valued pointwise discontinuous functions”

April 2011, Department of Mathematics, M. Bela University, Banska Bystrica, Slovakia “On Volterra spaces”

April 2011, Institute of Mathematics, Slovak Acad. of Sciences, Bratislava, Slovakia “An extention of Michael-Namioka theorem on PCP and weakly developable spaces”

April 2011, Laboratoire de Mathematique, Universite de Rouen, France “Quasi-continuity and cliquishness”

March 2011, Special Session on Set-Theoretic Topology, Meeting of American Mathematical Society, Statesboro, GA, “Quasi-continuity and cliquishness on product spaces.”

October 2008, Special Session on Set-Theoretic Topology, Fall Meeting of American Mathematical Society, Huntsville, AL, “An extension of the Closed-Graph theorem for separately continuous functions.”

August 2008, Fifth International Conference of Applied Mathematics and Computing, Plovdiv, Bulgaria, “On Banach-Dudley Theorem”

April 2008, Department of Mathematics at the A. Dlugosz Academy, Czestochowa, Poland “Separate and Joint Continuity – New Results and Open Problems”

April 2008, Department of Mathematics at Matej Bela University, Banska Bystrica, Slovakia “Continuity on Product Spaces – New Results”

April 2008, Department of Mathematics at the University of Auckland, New Zealand “Algebra-free Topological Algebra”

March 2008, Mini-Conference on Algebra and Analysis at the Auckland University of Technology, Auckland, New Zealand “Topological Version of the Closed Graph Theorem”.

March 2008 Department of Mathematics at University of Shandong at Jinan, Peoples’ Republic of China “Separate Versus Joint Continuity”.

March 2008, Department of Mathematics at Shenzhen University, Peoples’ Republic of China “Theorem of Sierpinski and the Closed Graph Theorem for Separately Continuous Functions”.

March 2008 Department of Mathematics at the Chinese University of Hong Kong “Continuity on Produce Spaces”.

March 2008, Department of Mathematics at
Shenzhen University, Peoples’ Republic of China

“First Steps in Separate Versus Joint Continuity”

October 2007, Department of Mathematics of Pomeranian Academy in Slupsk, Poland “Introduction to Topological Groups and Banach-Dudley Theorem”

May 2007, Institute of Mathematics, Wroclaw University, Poland “Continuity on Product Spaces”

May 2007, XXI International Conference on Real Functions Theory Niedzica, Poland “A generalization of the Closed-Graph theorem for separately continuous functions.

May 2007, Department of Mathematics, Pomeranian Academy, Slupsk, Poland, "Continuous functions having 'small' preimages of 'small' sets"

April 2007, Cleveland Society of Poles "Polish Contributions to the World Mathematics"

December 2006, Department of Mathematics, Pomeranian Academy, Slupsk, Poland, “Continuous functions having ‘small’ preimages of ‘small’ sets”.

June 2005, Department of Mathematics, Pomeranian Pedagogical Academy, Slupsk, Poland, “On Banach Category Theorem and its generalizations”.

June 2005, Department of Mathematics, Pomeranian Pedagogical Academy, Slupsk, Poland, “On generalized oscillation function and Volterra's theorem”.

May 2005, , International Conference on Real Functions Theory, Rowy, Poland,”On Dudley's theorem on automatic continuity for topological groups”.

May 2005, Institute of Mathematics, Wroclaw University, “Volterra spaces”, a special session in the memory of Prof. Dr. J.J.Charatonik.

April 2005, , Department of Mathematics, Pomeranian Pedagogical Academy, Slupsk, Poland, “Advanced and unsolved problems in Separate versus joint continuity”.

April 2005, Department of Mathematics, Pomeranian Pedagogical Academy, Slupsk, Poland, ”Elementary proofs in Separate versus Joint continuity”.

March 2005, Institute of Mathematics, Gdansk University, Poland, “Volterra's theorem and other results on Real Analysis”.

March 2005, Institute of Mathematics, Gdansk University, Poland, “Brown's theorem on separate versus joint continuity”.

March 2005, Institute of Mathematics, Gdansk University, Poland, “Semi-topological and paratopological groups”.

March 2005, Institute of Mathematics, Gdansk University, Poland, “First steps in separate versus joint continuity – early history”.

February 2005, Department of Mathematics, Banska Bystrica University, Slovakia, “Separate and joint continuity-an elementary approach”.

October 2004, Department of Mathematics, Auburn University, Auburn, AL, “Generalized oscillation and continuity on product spaces”.

June 2004, XXVIII Summer Symposium in Real Analysis, Slippery Rock University, PA, “Near continuity on product spaces”

April 2004, Department of Mathematics, Komenskeho Univerzita, Bratislava, Slovakia, “Separate continuity revisited”

January 2004, Department of Mathematics, Auckland University, New Zealand, “Quasi-continuity, Baire 1 and separate continuity of functions”

March 2003, Department of Mathematics, University of Pittsburgh, PA, “Topology groups and fragmentability of spaces”

March 2003, Spring Topology and Dynamical Systems Conference, Lubbock, TX, “Topological games, quasi-continuity and groups”

June 2002, Department of Mathematics of the University of Murcia, Spain., “Namioka spaces - new results and open problems”

June 2002, International Conference on Topology in Matsue 2002, Shimane, Japan, “Real-valued functions having ‘small’ preimages of ‘small’ sets”

June 2002, Department of Mathematics, Pomeranian Pedagogical Academy, Słupsk, Poland, “On Sierpiński’s theorem on the unique determination of separately continuous functions from their values on any dense subspace”

May 2002, International Conference on Real Functions, Słupsk, Poland, “On Volterra Spaces”

April 2002, Department of Mathematics of Komenskeho University in Bratislava, Slovakia, “Continuity on Product Spaces – An Update”

April 2002, Slovak Academy of Sciences in Bratislava, Slovakia, “Volterra Spaces”

April 2002, Mathematics Department of M. Bela University in Banska Bystrica, Slovakia, “Special Points of Continuity of Two Real – Valued Functions”

April 2002, Košice Section of the Slovak Academy of Sciences in Košice, Slovakia, “Baire Spaces and Their Generalizations”

March 2002, Department of Mathematics of Silesian University in Katowice, Poland “Separate vs. Joint Continuity: Solution of a Henriksen – Woods Problem”

August 2001, 9th Prague Topological Symposium, Prague, Czech Republic, “A solution of a problem of Henriksen and Woods ”

May 2001 International Conference on Real Functions, Łeba, Poland “Volterra spaces and the solution of a problem on separate versus joint continuity””

May 2001 Workshop on Abstract Analysis, Lubiatowo – Kopalino, Poland “On various functional characterization of Baire spaces”

Nov, 2000 Department of Mathematics, Baldwin Wallace College, Cleveland OH, “ On Stirling’s formula”

Oct, 2000 Department of Mathematics, University of Pittsburgh, PA, “ An answer to the Uniformization Problem in separate vs joint continuity”

May 2000, Topology Seminar, A. Mickiewicz University, Poznan, Poland, “Product Continuity and a Solution of Henriksen – Woods Problem”

April 2000, Košice Chapter, Slovak Academy of Sciences, Slovakia, “Separate and Joint Continuity – Unsolved Problems”

April 2000, 29th Spring Conference Union Bulg., Lovetch, Bulgaria, “Separate Versus Joint Continuity – an Update”

April 2000, Department of Mathematics, M. Bela University in Banska-Bystrica, Slovakia, “Product Continuity – An Introduction”

March 2000, Department of Mathematics, Victoria University, Wellington, New Zealand, “Product Continuity and Its Application to Topological Algebra”

March 2000, Department of Mathematics, Waikato University in Hamilton, New Zealand, “Quasi-continuity and Fragmentable Spaces”

February 2000, Davonport Topology Conference, Davonport, New Zealand, “Open Problems in Separate Versus Joint Continuity”

February 2000, Department of Mathematics and Statistics, Auckland University, Auckland, New Zealand, “Contiuity on Product Spaces”

October 1999, Real Analysis Seminar, A.Mickiewicz University, Poznan, Poland, “On Sierpinski’s Theorem on the Uniqueness of Determination of Separately Continuous Functions from their Dense Subspaces”

September 1999, Conference devoted to the 100th anniv. R.Baire, Chernivtsi, Ukraine, “Separate and Joint Continuity”

September 1999, Symposium on Classical Analysis, Kazimierz Dolny, Poland, “On Contractions and Expansions in Totally Bounded Spaces”

Oct. 1998 Department of Mathematics, West Virginia University, Morgantown, WV, “On problems in Descriptive Set Theory, General Topology and Topological Algebra which arise in Separate versus Joint Continuity”

Mar. 1998 AMS Southeastern Sectional Meeting, Special Session on Real Analysis, University of Louisville, KY, “On separately open sets and linearly continuous functions”

Oct. 1997 Department of Mathematics, University of Pittsburgh, PA, “Generalized Baire spaces and continuity along algebraic curves”

Oct. 1997 925th Meeting of the Southeastern Section of the American Mathematical Society, Atlanta, GA, “On a theorem of S.G. Slobodnik”

May 1997 Department of Mathematics, Oxford University, England, “Generalized oscillation function and continuity on product spaces”

May 1997 Department of Pure Mathematics and Mathematical Statistics, University of Cambridge, England, “On continuity on product spaces”

Mar. 1997 Department of Mathematics, Cleveland State University, Cleveland, OH, “Separate and joint continuity”

Sept. 1996 Tenth Summer School on Real Function Theory, Liptovsky Jan, Slovakia, “Separate and joint continuity in Baire groups”

June 1996 Twentieth Summer Symposium in Real Analysis, Windsor, Canada, “On three problems on separate and joint continuity”

Mar. 1996 Mini-Conference on Abstract Analysis, Department of Mathematics & Statistics, YSU, “On the determination of separately continuous functions”

April 1995 Department of Mathematics, University of Pittsburgh, PA, “Separate and joint continuity - new results and open problems”

Mar. 1995 Symposium on Abstract Analysis, Department of Mathematics, YSU, “Ideal Banach Category theorems and functions”

April 1994 Department of Mathematics, Kent State University, OH , “Continuity of separately continuous functions”

Mar. 1994 Mini-Conference on Topology and Related Areas, Department of Mathematics, YSU, “Topological groups: When is a Baire Semitopological Group Paratopological?”

Mar. 1994 Analytical Topology and Topological Algebra Symposium at the University of Pittsburgh, PA, “Mibu’s Theorem”

Mar. 1994 Spring Topology Conference, Auburn, AL, “Around Ellis’ Theorem”

Feb. 1994 Department of Mathematics, University of Pittsburgh, PA, “Continuity of separately continuous functions”

Sept. 1993 7th Symposium on Classical Analysis, Kazimierz Dolny, Poland, “Mibu-type theorems”

Mar. 1993 Spring Topology Conference, Columbia, SC, “On the theorems of Y. Mibu and G. Debs on separate continuity”

Jan. 1993 Winter Meeting of AMS, San Antonio, TX, “On pre-images of Baire spaces”

May 1992 University of Hawaii, Honolulu, HI “Applications of Separate and Joint Continuity to Topological Algebra”

May 1992 University of Hawaii, Honolulu, HI “Separate and Joint Continuity”

May 1992 Annual Meeting of the New Zealand Math. Society, Wellington, “Separate Continuity, Namioka and Sierpi.ski Spaces”

Mar. 1992 University of Auckland, New Zealand, “Continuity on Product Spaces”

Feb. 1992 Duksung University, Korea, “Introduction to Separate and Joint Continuity Theory”

Feb. 1992 Kyunghee University, Korea, “On Blumberg Theorem”

Feb. 1992 Conference on Geometric Topology, Seoul, Korea, “Continuity on Product Spaces”

Feb. 1992 University of Tsukuba, Ibaraki, Japan, “Some Applications of Separate and Joint Continuity”

Feb. 1992 University of Tsukuba, Ibaraki, Japan, “Continuity on Product Spaces”

Nov. 1991 Loránd University, Budapest, Hungary “Generalized Oscillation Function and Continuity on Product Spaces”

Nov. 1991 Université de Franche-Comté, Besan¹on, France, “Topological Games and Generalized Oscillation Function”

Oct. 1991 Technological University, Košice, Czechoslovakia, “Separate and Joint Continuity”

Oct. 1991 Comenianum University, Bratislava, Czechoslovakia, “Continuity on Product Spaces”

Oct. 1991 University of Łódź, Poland, “On Generalized Oscillation Function”

Oct. 1991 Bydgoszcz Section of the Polish Math Society, “Topological Games and Generalized Oscillation Function”

Oct. 1991 Gdańsk University, Poland, “Continuity on the products of topological spaces”

Jan. 1989 Winter Meeting of AMS, Phoenix, AZ

Oct. 1988 845th Meeting of AMS, Special Session: Real Analysis, “Recent results on separate and joint continuity”

Oct. 1988 Department of Mathematics, University of Pittsburgh, “On irresolvable spaces”

Mar. 1988 Department of Mathematics, Lycoming College, Williamsport, PA, “On matrix games”

Jan. 1988 Winter Meeting of AMS, Atlanta, GA

Nov. 1987 Department of Mathematics, The University of Mississippi, “Separate and joint continuity”

Mar. 1986 Spring Topology Conference, Birmingham, AL

Feb. 1986 Topology Gathering, Slippery Rock State University, “Separating functions and game-defined spaces”

Jan. 1986 Winter Meeting of AMS, San Antonio, TX

Nov. 1985 NSF Mini-conference in Harmonic Analysis and Related Areas, Auburn, AL, “Closed Graph Theorem”

June 1985 Ninth Summer Symposium on Real Analysis, University of Louisville, KY, “Separate and joint continuity”

May 1985 Department of Mathematics, Slippery Rock State University, “On Blumberg-type theorems”

Mar. 1985 Spring Topology Conference, Tallahassee, FL

Jan. 1984 Winter Meeting of AMS, Cincinnati, OH

Mar. 1983 Spring Topology Conference, Houston, TX

Mar. 1982 Spring Topology Conference, Annapolis, MD, “On Joint Continuity Triples”

May 1981 Department of Mathematics, Cleveland State University, Colloquium: “On completeness properties in topology”

Mar. 1981 Spring Topology Conference, Blacksburg, VA

May 1979 Katowice branch of the Polish Mathematical Society, “Separate and joint continuity in topological spaces”

Mar. 1979 Słupsk branch of the Polish Mathematical Society, “Blumberg theorem and some other results concerning real functions”

Aug. 1978 Colloquia Mathematica Soc. J. Bolyai, Budapest, Hungary, “Separate almost continuity and joint continuity”

July 1978 International Conference on Geometric Topology, Warsaw “Quasi continuity and product spaces”