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Browsing Matematik / Mathematics by Author "Öztürk, Mahpeyker"

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Common Fixed Point Theorems Satisfying Contractive Type Conditions in Complex Valued Metric Spaces

Öztürk, Mahpeyker (HINDAWI PUBLISHING CORPORATION, 2014)

Some common fixed point theorems satisfying contractive conditions involving rational expressions and product for four mappings that satisfy property (E.A) along with weak compatibility of pairs are proved and further some ...
ON SOME COMMON FIXED POINT THEOREMS WITH RATIONAL EXPRESSIONS ON CONE METRIC SPACES OVER A BANACH ALGEBRA

Öztürk, Mahpeyker; Başarır, Metin (HACETTEPE UNIV, FAC SCI, 2012)

In the present paper we have defined a new space called a BA-cone metric space by taking a Banach algebra instead of a Banach space. Some common fixed point theorems involving rational expressions have been proved and some ...
On some fixed-point theorems for psi-contraction on metric space involving a graph

Öztürk, Mahpeyker (SPRINGEROPEN, 2014)

In this paper, we introduce the (G,psi)-contraction and the (G,psi)-graphic contraction in a metric space by using a graph. We explain some conditions for a mapping which is a (G,psi)-contraction to have a unique fixed ...
On Some Generalized B-m-Difference Riesz Sequence Spaces and Uniform Opial Property

Başarır, Metin; Öztürk, Mahpeyker (SPRINGER INTERNATIONAL PUBLISHING AG, 2011)

We define the new generalized difference Riesz sequence spaces r(infinity)(q)(p, B-m), r(c)(q)(p, B-m), and r(0)(q)(p, B-m) which consist of all the sequences whose B-m-transforms are in the Riesz sequence spaces ...
Phylogenetic and cladistic analyses of the enigmatic genera Bituminaria and Cullen (Fabaceae) in Turkey

Sezen Toksoy; Öztürk, Mahpeyker; Sağıroğlu, Mehmet (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2015)

Three taxa of the genus Psoralea L. growing naturally in Turkey and the outgroup taxa belonging to the closest genera Vicia L., Cicer L., and Astragalus L. were subjected to molecular and quantitative morphological analyses ...
Some topological and geometric properties of generalized Euler sequence space

Başarır, Metin; Öztürk, Mahpeyker (VERSITA, 2010)

In this paper, we introduce the Euler sequence space e (r) (p) of nonabsolute type and prove that the spaces e (r) (p) and l(p) are linearly isomorphic. Besides this, we compute the alpha-, beta- and gamma-duals of the ...