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2. Ideal version of Ramsey's theorem
- Creator:
- Filipów, Rafał, Mrożek, Nikodem, Recław, Ireneusz , and Szuca, Piotr
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- ideal of subsets of natural numbers, Bolzano-Weierstrass theorem, Bolzano-Weierstrass property, ideal convergence, statistical density, statistical convergence, subsequence, monotone sequence, and Ramsey's theorem
- Language:
- English
- Description:
- We consider various forms of Ramsey's theorem, the monotone subsequence theorem and the Bolzano-Weierstrass theorem which are connected with ideals of subsets of natural numbers. We characterize ideals with properties considered. We show that, in a sense, Ramsey's theorem, the monotone subsequence theorem and the Bolzano-Weierstrass theorem characterize the same class of ideals. We use our results to show some versions of density Ramsey's theorem (these are similar to generalizations shown in [P. Frankl, R. L. Graham, and V. Rödl: Iterated combinatorial density theorems. J. Combin. Theory Ser. A 54 (1990), 95–111].
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3. Lacunary weak statistical convergence
- Creator:
- Nuray, Fatih
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- weak convergence, statistical convergence, lacunary sequence, and lacunary statistical convergence
- Language:
- English
- Description:
- The aim of this work is to generalize lacunary statistical convergence to weak lacunary statistical convergence and I-convergence to weak I-convergence. We start by defining weak lacunary statistically convergent and weak lacunary Cauchy sequence. We find a connection between weak lacunary statistical convergence and weak statistical convergence.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
4. Remarks on statistical and I-convergence of series
- Creator:
- Červeňanský, J., Šalát, T., and Toma, V.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- statistical convergence, I-convergence, and I-convergent serie
- Language:
- English
- Description:
- In this paper we investigate the relationship between the statistical (or generally I-convergence) of a series and the usual convergence of its subseries. We also give a counterexample which shows that Theorem 1 of the paper by B. C. Tripathy ''On statistically convergent series'', Punjab. Univ. J. Math. 32 (1999), 1–8, is not correct.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
5. Statistical convergence of infinite series
- Creator:
- Dindoš, M., Šalát, Tibor, and Toma, Vladimír
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- statistical convergence, set of the first category, Hausdorff dimension, and homogeneous set
- Language:
- English
- Description:
- In this paper we use the notion of statistical convergence of infinite series naturally introduced as the statistical convergence of the sequence of the partial sums of the series. We will discuss some questions related to the convergence of subseries of a given series.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
6. Statistical convergence of subsequences of a given sequence
- Creator:
- Mačaj, M. and Šalát, T.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- asymptotic density, statistical convergence, Lebesgue measure, Hausdorff dimension, and Baire category
- Language:
- English
- Description:
- This paper is closely related to the paper of Harry I. Miller: Measure theoretical subsequence characterization of statistical convergence, Trans. Amer. Math. Soc. 347 (1995), 1811–1819 and contains a general investigation of statistical convergence of subsequences of an arbitrary sequence from the point of view of Lebesgue measure, Hausdorff dimensions and Baire’s categories.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public