Janusz Konieczny, professor of mathematics, gave a talk, *Maximal Commutative Subsemigroups of a Finite Semigroup*, at the AMS Special Session on Recent Trends in Semigroup Theory, at the Joint Mathematics Meetings, Denver Colorado, January 2020. The talks at the special session were by invitation only. Konieczny’s talk contained the research done during the sabbatical leave in the fall of 2017.

## Konieczny Presents at Joint Mathematics Meetings

## Konieczny Publishes in Journal of Algebra

Janusz Konieczny, professor of mathematics, co-authored a research article, *Conjugacy in inverse semigroups*, published in the Journal of Algebra. The journal’s website reads:

“The *Journal of Algebra* is a leading international journal and publishes papers that demonstrate high quality research results in **algebra** and related computational aspects. Only the very best and most interesting papers are to be considered for publication in the journal. With this in mind, it is important that the contribution offer a substantial result that will have a lasting effect upon the field.”

## Konieczny Publishes in Algebra Colloquium

Janusz Konieczny, professor of mathematics, published a research article, *The semigroup of surjective transformations on an infinite set,* in the journal Algebra Colloquium. This research has been supported by a 2015–16 University of Mary Washington Faculty Research Grant.

## Konieczny Publishes in Asian-European Journal of Mathematics

Janusz Konieczny, professor of mathematics, published a research article, *Second centralizers in the semigroup of injective transformations*, in the Asian-European Journal of Mathematics. This research has been supported by a a 2017–18 University of Mary Washington Faculty Research Grant.

## Konieczny Publishes in Theoretical Computer Science

Janusz Konieczny, professor of mathematics, co-authored a research article, “Decidability and independence of conjugacy problems in finitely presented monoids,” published in the journal Theoretical Computer Science.

## Konieczny Research Appears in Edinburgh Math Journal

Janusz Konieczny, professor of mathematics, co-authored a research article, “Four notions of conjugacy for abstract semigroups,” published in Proceedings of the Royal Society of Edinburgh. This research was supported by the 2011–12 University of Mary Washington Faculty Research Grant.

## Konieczny Publishes in Semigroup Forum

Janusz Konieczny, professor of mathematics, published a research article, *Centralizers in full injective transformations in the symmetric inverse semigroup, *in the journal Semigroup Forum. This research was supported by a 2014–15 University of Mary Washington Faculty research grant.

## Konieczny Presents at American Mathematical Society Meeting

Janusz Konieczny, professor of mathematics, gave a talk, *A new definition of conjugacy for semigroups*, in the Special Session on Recent Trends in Semigroup Theory at the meeting of the American Mathematical Society, University of Denver, Denver, Colorado, Oct. 8-9, 2016.