O. Ravsky

activity

20122015

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Showing 2013Show all

2 papers · 1 filter

math.GR2013

On feebly compact inverse primitive (semi)topological semigroups

Oleg Gutik, Oleksandr Ravsky

We study the structure of inverse primitive feebly compact semitopological and topological semigroups. We find conditions when the maximal subgroup of an inverse primitive feebly c…

math.CO2013

On partitions of G-spaces and G-lattices

Taras Banakh, Oleksandr Ravsky, Sergiy Slobodianiuk

Given a $G$ -space $X$ and a non-trivial $G$ -invariant ideal $I$ of subsets of $X$ , we prove that for every partition $X = A_{1} \cup \dots \cup A_{n}$ of $X$ into $n \geq 2$ pieces there is a…