I. Protasov

most citedThe comb-like representations of cellular ordinal balleans

2 citations · 2 across the 3 of their papers we have counts for

collaborators

3 papers

math.GN2016★ 2 cited

The comb-like representations of cellular ordinal balleans

I. V. Protasov, K. D. Protasova

Given two ordinal $λ$ and $γ$ , let $f : [0, λ) \to [0, γ)$ be a function such that, for each $α < γ$ , $sup {f (t) : t \in [0, α]} < γ .$ We define a mapping $d_{f}: [0,λ)\times [0,λ)…

math.GN2013

Ultrafilters on metric Spaces

I. V. Protasov

Let $X$ be an unbounded metric space, $B (x, r) = {y \in X : d (x, y) ⩽ r}$ for all $x \in X$ and $r ⩾ 0$ . We endow $X$ with the discrete topology and identify the Stone-…

math.CO2013

Thin subsets of groups

I. V. Protasov, S. Slobodianiuk

For a group $G$ and a natural number $m$ , a subset $A$ of $G$ is called $m$ -thin if, for each finite subset $F$ of $G$ , there exists a finite subset $K$ of $G$ such that $|Fg\cap A…