Descripción completa.

In the present paper, we propose a modification for a certain family of summation integral type operators. We study direct results on the modified operators. It is also observed that our modified operators have better estimates over the original operators.Key…

Residual types in time series has not been investigated throughly in literature. This study aims to provide practical applications of residual types. In this study, firstly, basic information about different types of residuals was given and some features of the…

In this paper a general fixed point theorem for mappings satisfying an phi - implicit relation is proved, which generalize the results from [3] and [13].  

Descripción completa.

In this study the acute toxicity of zinc chloride (ZnCl2) to Daphnia magna Straus was investigated in a static bioassay. After 24, 48, 72 and 96 h the mobility of daphnids were examined and immobile ones were counted. The 24,…

As a result of lichenological study in Turkey, in the provinces of Afyonkarahisar and Kırıkkale, we report 120 taxa of lichen. 78 taxa are new to the province of Afyonkarahisar and 22 taxa are new to the provinces of Kırıkkale. Key…

Aromatic dialdehydes were synthesized from 5-t-butylsalicylaldehyde and o-vanilline in good yields using paraformaldehyde, hydrobromic acid and catalytic amounts of sulfuric acid in one step which was previously unavailable with present methods. Key Words: aromatic dialdehydes, bromomethylation, 5-t-butylsalicylaldehyde, o-vanilline. 

A highly efficient synthesis of 3,4-dihydropyrimidin-2(1H)-ones/thiones in 2-ethylhexanoic acid as green, low cost and recoverable catalytic medium, illustrates good synthetic utility of this method.  Key Words:  2-ethylhexanoic acid, 3,4-dihydropyrimidin-2(1H)-ones/thiones, organocatalyst. 

In this paper, we obtain a common coincidence point theorem for  two pairs of hybrid functions on cone metric spaces. Key words: Cone metric spaces,coincidence points, multi functions.2000 Mathematics Subject Classification : 47H10,54H25.