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On the $t$-equivalence of generalized ordered sets
N. N. Trofimenko, T. E. Khmyleva Tomsk State University
Abstract:
We consider the generalized ordered spaces $X$ and $Y$ such that the tightness $t(X)$ coincides with the tightness $t(Y)$ but $T(X)=\{x\in X : t(x, X)=t(X)\}$ and $T(Y)=\{y\in Y : t(y, Y)=t(Y)\}$ have different cardinalities. Some sufficient conditions are found under which such spaces $X$ and $Y$ are not $t$-equivalent.
Keywords:
ordered topological spaces, cofinal subsets, regular ordinals, tightness, functional tightness, Hewitt completion, homeomorphism, topology of pointwise convergence.
Received: 08.06.2022 Revised: 22.08.2022 Accepted: 10.10.2022
Citation:
N. N. Trofimenko, T. E. Khmyleva, “On the $t$-equivalence of generalized ordered sets”, Sibirsk. Mat. Zh., 64:2 (2023), 441–448; Siberian Math. J., 64:2 (2023), 424–430
Linking options:
https://www.mathnet.ru/eng/smj7771 https://www.mathnet.ru/eng/smj/v64/i2/p441
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Abstract page: | 81 | Full-text PDF : | 15 | References: | 20 | First page: | 7 |
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