The next meeting of the Algebra and Logic Seminar will be held on **May 5, 2023** (Friday) **at 1:00 pm (UTC+3)** online in Zoom.

**Prof. Jörg Koppitz **will deliver his inaugural lecture on:

**Algebraic Properties of Transformation Semigroups**

**Abstract. **Each semigroup is isomorphic to a semigroup of transformations on a suitable set (Cayley Theorem for semigroups). If we know generating sets of minimal size (rank) of a finitely generating semigroup then we have important information about the algebraic structure of the semigroup itself. For not finitely generated semigroups, we consider relative generating sets of minimal size modulo a given subset of the semigroup (relative rank). We determine the (relative) rank of several semigroups of transformations. These semigroups were already considered by other authors.

The seminar will be held online. Join the Zoom link:

https://us02web.zoom.us/j/

Topic: Онлайн семинар на секция “Алгебра и логика”

Time: May 05, 2023 01:00 PM Sofia

Meeting ID: 851 3737 5021

Passcode: 035647

Algebra and Logic Department, IMI – BAS

http://www.math.bas.bg/algebra/seminarAiL/

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