Murat Hayrettin Yurdakul

E-mail
myur@metu.edu.tr
Department
Department of Mathematics
A NOTE ON TRIANGULAR OPERATORS ON SMOOTH SEQUENCE SPACES
Uyanik, Elif; Yurdakul, Murat Hayrettin (2019-06-01)
For a scalar sequence (theta(n))(n is an element of N), let C be the matrix defined by c(n)(k) = theta(n-k+1) if n >= k, c(n)(k) = 0 if n < k. The map between Kothe spaces lambda(A) and lambda(B) is called a Cauchy Product...
A remark on a paper of P. B. Djakov and M. S. Ramanujan
Uyanik, Elif; Yurdakul, Murat Hayrettin (2019-01-01)
Let l be a Banach sequence space with a monotone norm in which the canonical system (e(n)) is an unconditional basis. We show that if there exists a continuous linear unbounded operator between l-Kothe spaces, then there e...
Frechet-Hilbert spaces and the property SCBS
Uyanik, Elif; Yurdakul, Murat Hayrettin (2018-01-01)
In this note, we obtain that all separable Frechet-Hilbert spaces have the property of smallness up to a complemented Banach subspace (SCBS). Djakov, Terzioglu, Yurdakul, and Zahariuta proved that a bounded perturbation of...
Bounded operators and complemented subspaces of Cartesian products
DJAKOV, PLAMEN; TERZİOĞLU, AHMET TOSUN; Yurdakul, Murat Hayrettin; Zahariuta, V. (2011-02-01)
We study the structure of complemented subspaces in Cartesian products X x Y of Kothe spaces X and Y under the assumption that every linear continuous operator from X to Y is bounded. In particular, it is proved that each ...
Vibrational frequencies and structural determination of 2,2 '-biquinoline
Yurdakul, S.; Yurdakul, Murat Hayrettin (2007-05-27)
We present a detailed analysis of the structure and infrared spectra of 2,2'-biquinoline. The vibrational frequencies of the 2,2'-biquinoline molecule have been analyzed using standard quantum chemical techniques. Frequenc...
HF and DFT studies and vibrational spectra of 1,2-bis(2-pyridyl) ethylene and its zinc (II) halide complexes
Ozhamam, Z.; Yurdakul, Murat Hayrettin; Yurdakul, S. (2007-03-11)
Ab initio restricted Hartree-Fock and density function theory calculations using BLYP, B3LYP and B3PW91 functionals were carried out to study molecular structure and vibrational spectrum of 1,2-bis(2-pyridyl)ethylene (whic...
DFT studies and vibrational spectra of trans 1,2-bis(4-pyridyl)ethylene and its zinc(II)halide complexes
Ozhamam, Z; Yurdakul, Murat Hayrettin; Yurdakul, S (2006-03-17)
The geometry, frequency and intensity of the vibrational bands of trans 1,2-bis(4-pyridyl)ethylene (which is abbreviated as bpe) were obtained using the density functional theory (DFT) with the BLYP, B3LYP, B3PW91 function...
On some normability conditions
Terzioglu, T; Yurdakul, Murat Hayrettin; Zahariuta, V (2005-01-01)
Various normability conditions of locally convex spaces (including Vogt interpolation classes DN phi and Omega phi as well as quasi- and asymptotic normability) are investigated. In particular, it is shown that on the clas...
The property of smallness up to a complemented Banach subspace
Abdeljawad, T; Yurdakul, Murat Hayrettin (2004-04-01)
This article investigates locally convex spaces which satisfy the property of smallness up to a complemented Banach subspace, the SCBS property, which was introduced by Djakov, Terzioglu, Yurdakul and Zahariuta. It is prov...
Factorization of unbounded operators on Kothe spaces
Terzioglou, T; Yurdakul, Murat Hayrettin; Zuhariuta, V (2004-01-01)
The main result is that the existence of an unbounded continuous linear operator T between Kothe spaces lambda(A) and lambda(C) which factors through a third Kothe space A(B) causes the existence of an unbounded continuous...
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