The comb-like representations of cellular ordinal balleans

Autor: Protasov, I. V., Protasova, K. D.

Given two ordinal $\lambda$ and $\gamma$, let $f:[0,\lambda) \rightarrow [0,\gamma)$ be a function such that, for each $\alpha<\gamma$, $\sup\{f(t): t\in[0, \alpha]\}<\gamma.$ We define a mapping $d_{f}: [0,\lambda)\times [0,\lambda) \longrightarrow

Externí odkaz: http://arxiv.org/abs/1603.08713

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Around $P$-small subsets of groups

Autor: Protasov, I. V., Protasova, K. D.

Publikováno v: Carpathian Mathematical Publications; Vol 6, No 2 (2014); 337-341
Карпатские математические публикации; Vol 6, No 2 (2014); 337-341
Карпатські математичні публікації; Vol 6, No 2 (2014); 337-341

A subset $X$ of a group $G$ is called $P$-small (almost $P$-small) if there exists an injective sequence $(g_{n})_{n\in\omega}$ in $G$ such that the subsets $(g_{n}X)_{n\in\omega}$ are pairwise disjoint ($g_{n}X\cap g_{m}X$ is finite for all distinct

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=vasylstefany::576561b36660648a906dcee64df744a8
http://journals.pu.if.ua/index.php/cmp/article/view/268

LATTICES OF COARSE STRUCTURES.

Autor: PROTASOV, I. V., PROTASOVA, K. D.

Publikováno v: Matematychni Studii; 2017, Vol. 48 Issue 2, p115-123, 9p