Öner ÇAKAR

B.S. :

Ankara University, 1964

M.S. :

Ph.D. :

Ankara University, 1968

Phone :

+90 (312) 212 6720 / 1260

Office #:

E-mail : 

cakar@science.ankara.edu.tr

Personal Home Page

Research Interest

Summability theory, Functional analysis, Operator theory

Publications

Bairamov, Elgiz; Çakar, Öner; Krall, Allan M. Spectral properties, including spectral singularities, of a quadratic pencil of Schrödinger operators on the whole real axis. Quaest. Math. 26 (2003), no. 1, 15--30.

Krall, Allan M.; Bairamov, Elgiz; Cakar, Oner Spectral analysis of non-selfadjoint discrete Schrödinger operators with spectral singularities. Math. Nachr. 231 (2001), 89--104.

Bairamov, Elgiz; Çakar, Öner; Krall, Allan M. Non-selfadjoint difference operators and Jacobi matrices with spectral singularities. Math. Nachr. 229 (2001), 5--14.

Bairamov, Elgiz; Cakar, Öner; Yanik, Canan Spectral singularities of the Klein-Gordon s-wave equation. Indian J. Pure Appl. Math. 32 (2001), no. 6, 851--857.

Gadjiev, A.D.; Çakar, Ö. On uniform approximation by Bleimann, Butzer and Hahn operators on all positive semiaxis. Translated by the authors. Trans. Acad. Sci. Azerb. Ser. Phys.-Tech. Math. Sci. 19 (1999), no. 5, Math. Mech., 21--26 (2000).

Bairamov, Elgiz; Çakar, Öner; Krall, Allan M. An eigenfunction expansion for a quadratic pencil of a Schrödinger operator with spectral singularities. J. Differential Equations 151 (1999), no. 2, 268--289.

Krall, Allan M.; Bairamov, Elgiz; Çakar, Öner Spectrum and spectral singularities of a quadratic pencil of a Schrödinger operator with a general boundary condition. J. Differential Equations 151 (1999), no. 2, 252--267.

Bairamov, Elgiz; Çakar, Öner; Çelebi, A. Okay Quadratic pencil of Schrödinger operators with spectral singularities: discrete spectrum and principal functions. J. Math. Anal. Appl. 216 (1997), no. 1, 303--320.

Orhan, C.; Çakar, Ö. Some inclusion theorems for absolute summability. Czechoslovak Math. J. 46(121) (1996), no. 4, 599--605.

Orhan, C.; Çakar, Ö. Almost A-boundedness and absolute almost summability. Bull. Calcutta Math. Soc. 83 (1991), no. 6, 527--530.

Çakar, Ö.; Orhan, C. A note on absolute summability. Bull. Calcutta Math. Soc. 83 (1991), no. 1, 29--34.

Pehlivan, S.; Çakar, Ö. The sequence space  and related matrix transformations. Tamkang J. Math. 21 (1990), no. 3, 233--237.

Çolak, R.; Çakar, Ö. Banach limits and related matrix transformations. Studia Sci. Math. Hungar. 24 (1989), no. 4, 429--436.

Çakar, Öner The space of sequences of which A-transforms are in . Comm. Fac. Sci. Univ. Ankara Sér. A1 Math. 29 (1980), no. 2, 13--18.

Bulut, E.; Çakar, Ö. The sequence space  and related matrix transformations. Comm. Fac. Sci. Univ. Ankara Sér. A1 Math. 28 (1979), no. 6, 33--44 (1980).

Çakar, Ö. A note on the matrix transformations of and defined in an incomplete space. Comm. Fac. Sci. Univ. Ankara Sér. A1 Math. 26 (1977), no. 2, 7--13.

 Çakar, Ö. On Cesaro sums of divergent series. Comm. Fac. Sci. Univ. Ankara Sér. A 23 (1974), no. 2, 1--12.

Çakar, Ö. On matrix transformations of sequence spaces defined in an incomplete space. Comm. Fac. Sci. Univ. Ankara Sér. A 22 (1973), 109--123.

Books

·    Çakar, Ö. “Fonksiyonel Analize Giriş” Erwin Kreyszig’ten Çeviri, A.Ü. Fen Fakültesi, Döner Sermaye İşletmesi Yayını, No.13 (6 Baskı)

·    Çelebi, O., Çakar, Ö. “Soyut Matematik” A.Ü. Fen Fakültesi Döner Sermaye İşletmesi Yayını, No.14 (5 Baskı)

·    Çakar, Ö., Bulut, E. “Matematik Analize Giriş” (Cilt I, Cilt 2) (R.S. Paul & E.F. Haussler’den Çeviri, Kara Harp Okulu Yayını) 1975.

·    Çakar, Ö., Taşçı, A.D., Şenkaynak, S, Der, Y., Hakbilir, H., Gökçe, A. “Matematik”  Lise 2 Temel Ders Kitabı, MEGSB 1981 (6 Baskı)

·    Çakar, Ö., Taşçı, A.D., Gökçe, A., Der, Y., Hakbilir, H. “Matematik”  Lise 3 Temel Ders Kitabı, 1986 (6 Baskı)