DOI QR코드

DOI QR Code

On Deferred f-statistical Convergence

  • Gupta, Sandeep (Department of Mathematics, Arya P. G. College) ;
  • Bhardwaj, Vinod K. (Department of Mathematics, Kurukshetra University)
  • Received : 2017.10.18
  • Accepted : 2018.03.09
  • Published : 2018.03.23

Abstract

In this paper, we generalize the concept of deferred density to that of deferred f-density, where f is an unbounded modulus and introduce a new non-matrix convergence method, namely deferred f-statistical convergence or $S^f_{p,q}$-convergence. Apart from studying the $K{\ddot{o}}the$-Toeplitz duals of $S^f_{p,q}$, the space of deferred f-statistically convergent sequences, a decomposition theorem is also established. We also introduce a notion of strongly deferred $Ces{\grave{a}}ro$ summable sequences defined by modulus f and investigate the relationship between deferred f-statistical convergence and strongly deferred $Ces{\grave{a}}ro$ summable sequences defined by f.

Keywords

References

  1. R. P. Agnew, On deferred Cesaro mean, Ann. Math., 33(1932), 413-421. https://doi.org/10.2307/1968524
  2. A. Aizpuru, M. C. Listan-Garcia and F. Rambla-Barreno, Density by moduli and statistical convergence, Quest. Math., 37(2014), 525-530. https://doi.org/10.2989/16073606.2014.981683
  3. Y. Altin and M. Et, Generalized difference sequence spaces defined by a modulus function in a locally convex space, Soochow J. Math., 31(2)(2005), 233-243.
  4. V. K. Bhardwaj and I. Bala, On weak statistical convergence, Int. J. Math. Math. Sci., Art. ID 38530(2007), 9 pp.
  5. V. K. Bhardwaj and S. Dhawan, f-statistical convergence of order ${\alpha}$ and strong Cesaro summability of order ${\alpha}$ with respect to a modulus, J. Inequal. Appl., 2015:332(2015), 14 pp.
  6. V. K. Bhardwaj, S. Dhawan and S. Gupta Density by moduli and statistical bound-edness, Abstr. Appl. Anal., Art. ID 2143018(2016), 6 pp.
  7. V. K. Bhardwaj and S. Gupta, On some generalizations of statistical boundedness, J. Inequal. Appl., 2014:12(2014), 11 pp.
  8. V. K. Bhardwaj and N. Singh, On some sequence spaces defined by a modulus, Indian J. Pure Appl. Math., 30(8)(1999), 809-817.
  9. V. K. Bhardwaj and N. Singh, Some sequence spaces defined by $|{\overline{N}},\;p_n|$ summability and a modulus function, Indian J. Pure Appl. Math., 32(12)(2001), 1789-1801.
  10. V. K. Bhardwaj and N. Singh, Banach space valued sequence spaces defined by a modulus, Indian J. Pure Appl. Math., 32(12)(2001), 1869-1882.
  11. H. R. Chillingworth, Generalized "dual" sequence spaces, Nederal. Akad. Wetensch. Indag. Math. 20(1958), 307-315.
  12. R. Colak, Lacunary strong convergence of difference sequences with respect to a modulus function, Filomat, 17(2003), 9-14.
  13. J. S. Connor, The statistical and strong p- Cesaro convergence of sequences, Analysis, 8(1988), 47-63.
  14. J. Connor, On strong matrix summability with respect to a modulus and statistical convergence, Canad. Math. Bull., 32(2)(1989), 194-198. https://doi.org/10.4153/CMB-1989-029-3
  15. M. Et, V. K. Bhardwaj and S. Gupta, On deferred statistical boundedness of order ${\alpha}$, (communicated).
  16. M. Et and H. Sengul, Some Cesaro-type summability spaces of order ${\alpha}$ and lacunary statistical convergence of order ${\alpha}$, Filomat, 28(8)(2014), 1593-1602. https://doi.org/10.2298/FIL1408593E
  17. H. Fast, Sur la convergence statistique, Colloq. Math., 2(1951), 241-244. https://doi.org/10.4064/cm-2-3-4-241-244
  18. J. A. Fridy, On statistical convergence, Analysis, 5(1985), 301-313.
  19. J. A. Fridy and C. Orhan, Lacunary statistical summability, J. Math. Anal. Appl., 173(1993), 497-504. https://doi.org/10.1006/jmaa.1993.1082
  20. D. Ghosh and P. D. Srivastava, On some vector valued sequence spaces defined using a modulus function, Indian J. Pure Appl. Math., 30(8)(1999), 819-826.
  21. M. Isik, Generalized vector-valued sequence spaces defined by modulus functions, J. Inequal. Appl., Art. ID 457892(2010), 7 pp.
  22. M. Isik and K. E. Akbas, On $\lambda$−statistical convergence of order ${\alpha}$ in probability, J. Inequal. Spec. Funct., 8(4)(2017), 57-64.
  23. G. Kothe and O. Toeplitz, Lineare Raume mit unendlich vielen Koordinaten und Ringe unendlicher Matrizen, J. Reine Agnew. Math., 171(1934), 193-226.
  24. M. Kucukaslan and M. Yilmazturk, On deferred statistical convergence of sequences, Kyungpook Math. J. 56(2016), 357-366. https://doi.org/10.5666/KMJ.2016.56.2.357
  25. I. J. Maddox, Inclusion between FK spaces and Kuttner's theorem, Math. Proc. Camb. Philos. Soc., 101(1987), 523-527. https://doi.org/10.1017/S0305004100066883
  26. M. Mursaleen, $\lambda$−statistical convergence, Math. Slovaca, 50(1)(2000), 111-115.
  27. H. Nakano, Concave modulars, J. Math. Soc. Japan, 5(1953), 29-49. https://doi.org/10.2969/jmsj/00510029
  28. D. Rath and B. C. Tripathy, On statistically convergent and statistically Cauchy sequences, Indian J. Pure. Appl. Math., 25(4)(1994), 381-386.
  29. W. H. Ruckle, FK spaces in which the sequence of coordinate vectors is bounded, Canad. J. Math., 25(1973), 973-978. https://doi.org/10.4153/CJM-1973-102-9
  30. T. Salat, On statistically convergent sequences of real numbers, Math. Slovaca, 30(1980), 139-150.
  31. H. Steinhaus, Sur la convergence ordinaire et la convergence asymptotique, Colloquium Mathematicum, 2(1951), 73-74.
  32. F. Temizsu, M. Et and M. Cinar, ${\Delta}^m$− deferred statistical convergence of order ${\alpha}$, Filomat, 30(3)(2016), 667-673. https://doi.org/10.2298/FIL1603667T
  33. M. Yilmazturk and M. Kucukaslan, On strongly deferred Cesaro summability and deferred statistical convergence of the sequences, Bitlis Eren Univ. J. Sci. and Technol., 3(2011), 22-25.