An online session of the Algebra and Logic Seminar will be held on **February 18, 2022** (Friday) **at 4:00 pm (UTC+2). **

A talk on:

**The Bulgarian Solitaire and Other Games on Partition**s

**The Bulgarian Solitaire and Other Games on Partition**s

will be delivered by **Vesselin Drensky (IMI – BAS). **

**Abstract. **In 2020 the L.N. Gumilyov Eurasian National University (Nur-Sultan, Kazakhstan) decided to organize International Scientific Conference “Algebra and Logic” dedicated to the 60th anniversary of Professor Ualbai Umirbaev and the 75th anniversary of Professor Leonid Makar-Limanov. The meeting was cancelled because of the Covid-19 pandemic. The present talk is based on the talk I planned to give in Nur-Sultan.

*n*cards is divided into several decks (or “piles”). Each move consists of the removing of one card from each deck and collecting the removed cards to form a new deck. The game ends when the same position occurs twice. It has turned out that when

*n*=

*k*(

*k*+ 1)/2 is a triangular number, the game reaches the same stable configuration with size of the piles 1,2,…,

*k*. In the talk we discuss mathematical problems related with the Bulgarian solitaire. The talk is based on the paper (with additional information collected after its publishing):

http://www.math.bas.bg/smb/

The seminar will be held via Zoom and anyone can join at:

https://us02web.zoom.us/j/85137375021?pwd=RE5QczdFTE1xL1R6MnI2b1lkcGczQT09

Topic: Онлайн семинар на секция “Алгебра и логика”

Time: Feb 11, 2022 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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