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STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS

Yıl 2010, Cilt: 39 Sayı: 4, 497 - 514, 01.04.2010

Öz

In this paper, we obtain fuzzy approximations to fuzzy differentiable functions by means of fuzzy linear operators whose positivity condition and classical limits fail. In order to get more powerful results than the classical approach we investigate the effects of matrix summability methods on the fuzzy approximation. So, we mainly use the notion of A-statistical convergence from summability theory instead of the usual convergence.

Kaynakça

  • Altomare, F. and Campiti, M. Korovkin Type Approximation Theory and Its Application (Walter de Gruyter Publ., Berlin, 1994).
  • Altomare, F. and Rasa, I. Approximation by positive operators in spaces Cp([a, b]), Anal. Num´er. Th´eor. Approx. 18, 1–11, 1989.
  • Anastassiou, G. A. On basic fuzzy Korovkin theory, Studia Univ. Babe¸s-Bolyai Math. 50, –10, 2005.
  • Anastassiou, G. A. Higher order fuzzy Korovkin theory via inequalities, Commun. Appl. Anal. 10, 359–392, 2006.
  • Anastassiou, G. A. and Duman, O. Statistical fuzzy approximation by fuzzy positive linear operators, Comput. Math. Appl. 55, 573–580, 2008.
  • Anastassiou, G. A. and Duman, O. A Baskakov type generalization of statistical Korovkin theory, J. Math. Anal. Appl. 340, 476–486, 2008.
  • Boos, J. Classical and Modern Methods in Summability (Oxford University Press, UK, ). Brosowksi, B. A Korovkin-type theorem for differentiable functions, Approximation Theory, III (Proc. Conf., Univ. Texas, Austin, Tex., 1980) (Academic Press, New York-London, ), 255–260.
  • Delgado, F. J. M., Gonz´ales, V. R. and Morales, D. C. Qualitative Korovkin-type results on conservative approximation, J. Approx. Theory 94, 144–159, 1998.
  • Dirik, F., Duman, O. and Demirci, K. Statistical approximation to B¨ogel-type continuous and periodic functions, Cent. Eur. J. Math. 7, 539–549, 2009.
  • Do˘gru, O. and Duman, O. Statistical approximation of Meyer-K¨onig and Zeller operators based on q-integers, Publ. Math. Debrecen 68, 199–214, 2006.
  • Duman, O. Statistical approximation for periodic functions, Demonstratio Math. 36, 873– , 2003.
  • Duman, O. and Anastassiou, G. A. On statistical fuzzy trigonometric Korovkin theory, J. Comput. Anal. Appl. 10, 333–344, 2008.
  • Duman, O., Khan, M. K. and Orhan, C. A-Statistical convergence of approximating opera- tors, Math. Inequal. Appl. 6, 689–699, 2003.
  • Duman, O., Erku¸s, E. and Gupta, V. Statistical rates on the multivariate approximation theory, Math. Comput. Modelling 44, 763–770, 2006.
  • Erku¸s, E. and Duman, O. A Korovkin type approximation theorem in statistical sense, Studia Sci. Math. Hungar. 43, 285–294, 2006.
  • Erku¸s, E. and Duman, O. A-statistical extension of the Korovkin type approximation theo- rem, Proc. Indian Acad. Sci. (Math. Sci.) 115, 499–508, 2005.
  • Fast, H. Sur la convergence statistique, Colloq. Math. 2, 241–244, 1951.
  • Freedman, A. R. and Sember, J. J. Densities and summability, Pacific J. Math. 95, 293–305, Fridy, J. A. On statistical convergence, Analysis 5, 301–313, 1985.
  • Gal, S. G. Approximation theory in fuzzy setting, Handbook of Analytic-Computational Methods in Applied Mathematics(Chapman & Hall/CRC, Boca Raton, FL, 2000), 617–
  • Goetschel, R. J. and Voxman, W. Elementary fuzzy calculus, Fuzzy Sets and Systems 18, –43, 1986.
  • Gong, Z., Wu, C. and Li, B. On the problem of characterizing derivatives for the fuzzy-valued functions, Fuzzy Sets and Systems 127, 315–322, 2002.
  • Kaleva, O. Fuzzy differential equations, Fuzzy Sets and Systems 24, 301–317, 1987.
  • Karaku¸s, S., Demirci, K. and Duman, O. Equi-statistical convergence of positive linear operators, J. Math. Anal. Appl. 339, 1065–1072, 2008.
  • Knoop, H. B. and Pottinger, P. Ein satz von Korovkin-typ f¨ur Ck-ra¨ume, Math. Z. 148, –32, 1976.
  • Kolk, E. Matrix summability of statistically convergent sequences, Analysis 13, 77–83, 1993.
  • Korovkin, P. P. Linear Operators and Approximation Theory (Hindustan Publ. Corp., Delhi, ). Matloka, M. Sequences of fuzzy numbers, BUSEFAL 28, 28–37, 1986.
  • Miller, H. I. A measure theoretical subsequence characterization of statistical convergence, Trans. Amer. Math. Soc. 347, 1811–1819, 1995.
  • Nuray, F. and Sava¸s, E. Statistical convergence of sequences of fuzzy numbers, Math. Slovaca , 269–273, 1995.
  • Wu, C. X. and Ma, M. Embedding problem of fuzzy number space I, Fuzzy Sets and Systems , 33–38, 1991.
  • Wu, C. and Gong, Z. On Henstock integral of fuzzy-number-valued functions I, Fuzzy Sets and Systems 120, 523–532, 2001.

STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS

Yıl 2010, Cilt: 39 Sayı: 4, 497 - 514, 01.04.2010

Öz

Kaynakça

  • Altomare, F. and Campiti, M. Korovkin Type Approximation Theory and Its Application (Walter de Gruyter Publ., Berlin, 1994).
  • Altomare, F. and Rasa, I. Approximation by positive operators in spaces Cp([a, b]), Anal. Num´er. Th´eor. Approx. 18, 1–11, 1989.
  • Anastassiou, G. A. On basic fuzzy Korovkin theory, Studia Univ. Babe¸s-Bolyai Math. 50, –10, 2005.
  • Anastassiou, G. A. Higher order fuzzy Korovkin theory via inequalities, Commun. Appl. Anal. 10, 359–392, 2006.
  • Anastassiou, G. A. and Duman, O. Statistical fuzzy approximation by fuzzy positive linear operators, Comput. Math. Appl. 55, 573–580, 2008.
  • Anastassiou, G. A. and Duman, O. A Baskakov type generalization of statistical Korovkin theory, J. Math. Anal. Appl. 340, 476–486, 2008.
  • Boos, J. Classical and Modern Methods in Summability (Oxford University Press, UK, ). Brosowksi, B. A Korovkin-type theorem for differentiable functions, Approximation Theory, III (Proc. Conf., Univ. Texas, Austin, Tex., 1980) (Academic Press, New York-London, ), 255–260.
  • Delgado, F. J. M., Gonz´ales, V. R. and Morales, D. C. Qualitative Korovkin-type results on conservative approximation, J. Approx. Theory 94, 144–159, 1998.
  • Dirik, F., Duman, O. and Demirci, K. Statistical approximation to B¨ogel-type continuous and periodic functions, Cent. Eur. J. Math. 7, 539–549, 2009.
  • Do˘gru, O. and Duman, O. Statistical approximation of Meyer-K¨onig and Zeller operators based on q-integers, Publ. Math. Debrecen 68, 199–214, 2006.
  • Duman, O. Statistical approximation for periodic functions, Demonstratio Math. 36, 873– , 2003.
  • Duman, O. and Anastassiou, G. A. On statistical fuzzy trigonometric Korovkin theory, J. Comput. Anal. Appl. 10, 333–344, 2008.
  • Duman, O., Khan, M. K. and Orhan, C. A-Statistical convergence of approximating opera- tors, Math. Inequal. Appl. 6, 689–699, 2003.
  • Duman, O., Erku¸s, E. and Gupta, V. Statistical rates on the multivariate approximation theory, Math. Comput. Modelling 44, 763–770, 2006.
  • Erku¸s, E. and Duman, O. A Korovkin type approximation theorem in statistical sense, Studia Sci. Math. Hungar. 43, 285–294, 2006.
  • Erku¸s, E. and Duman, O. A-statistical extension of the Korovkin type approximation theo- rem, Proc. Indian Acad. Sci. (Math. Sci.) 115, 499–508, 2005.
  • Fast, H. Sur la convergence statistique, Colloq. Math. 2, 241–244, 1951.
  • Freedman, A. R. and Sember, J. J. Densities and summability, Pacific J. Math. 95, 293–305, Fridy, J. A. On statistical convergence, Analysis 5, 301–313, 1985.
  • Gal, S. G. Approximation theory in fuzzy setting, Handbook of Analytic-Computational Methods in Applied Mathematics(Chapman & Hall/CRC, Boca Raton, FL, 2000), 617–
  • Goetschel, R. J. and Voxman, W. Elementary fuzzy calculus, Fuzzy Sets and Systems 18, –43, 1986.
  • Gong, Z., Wu, C. and Li, B. On the problem of characterizing derivatives for the fuzzy-valued functions, Fuzzy Sets and Systems 127, 315–322, 2002.
  • Kaleva, O. Fuzzy differential equations, Fuzzy Sets and Systems 24, 301–317, 1987.
  • Karaku¸s, S., Demirci, K. and Duman, O. Equi-statistical convergence of positive linear operators, J. Math. Anal. Appl. 339, 1065–1072, 2008.
  • Knoop, H. B. and Pottinger, P. Ein satz von Korovkin-typ f¨ur Ck-ra¨ume, Math. Z. 148, –32, 1976.
  • Kolk, E. Matrix summability of statistically convergent sequences, Analysis 13, 77–83, 1993.
  • Korovkin, P. P. Linear Operators and Approximation Theory (Hindustan Publ. Corp., Delhi, ). Matloka, M. Sequences of fuzzy numbers, BUSEFAL 28, 28–37, 1986.
  • Miller, H. I. A measure theoretical subsequence characterization of statistical convergence, Trans. Amer. Math. Soc. 347, 1811–1819, 1995.
  • Nuray, F. and Sava¸s, E. Statistical convergence of sequences of fuzzy numbers, Math. Slovaca , 269–273, 1995.
  • Wu, C. X. and Ma, M. Embedding problem of fuzzy number space I, Fuzzy Sets and Systems , 33–38, 1991.
  • Wu, C. and Gong, Z. On Henstock integral of fuzzy-number-valued functions I, Fuzzy Sets and Systems 120, 523–532, 2001.
Toplam 30 adet kaynakça vardır.

Ayrıntılar

Birincil Dil İngilizce
Konular İstatistik
Bölüm Matematik
Yazarlar

Oktay Duman Bu kişi benim

Yayımlanma Tarihi 1 Nisan 2010
Yayımlandığı Sayı Yıl 2010 Cilt: 39 Sayı: 4

Kaynak Göster

APA Duman, O. (2010). STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS. Hacettepe Journal of Mathematics and Statistics, 39(4), 497-514.
AMA Duman O. STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS. Hacettepe Journal of Mathematics and Statistics. Nisan 2010;39(4):497-514.
Chicago Duman, Oktay. “STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS”. Hacettepe Journal of Mathematics and Statistics 39, sy. 4 (Nisan 2010): 497-514.
EndNote Duman O (01 Nisan 2010) STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS. Hacettepe Journal of Mathematics and Statistics 39 4 497–514.
IEEE O. Duman, “STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS”, Hacettepe Journal of Mathematics and Statistics, c. 39, sy. 4, ss. 497–514, 2010.
ISNAD Duman, Oktay. “STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS”. Hacettepe Journal of Mathematics and Statistics 39/4 (Nisan 2010), 497-514.
JAMA Duman O. STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS. Hacettepe Journal of Mathematics and Statistics. 2010;39:497–514.
MLA Duman, Oktay. “STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS”. Hacettepe Journal of Mathematics and Statistics, c. 39, sy. 4, 2010, ss. 497-14.
Vancouver Duman O. STATISTICAL FUZZY APPROXIMATION TO FUZZY DIFFERENTIABLE FUNCTIONS BY FUZZY LINEAR OPERATORS. Hacettepe Journal of Mathematics and Statistics. 2010;39(4):497-514.