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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Sahand Communications in Mathematical Analysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Coupled fixed point,Common fixed point,Bipolar metric space,Compatible mappings
- چکیده:
- چکیده انگلیسی: In this paper, we establish the existence of common coupled fixed point results for new Caristi type contraction of three covariant mappings in Bipolar metric spaces. Some interesting consequences of our results are achieved. Moreover, we give an illustration which presents the applicability of the achieved results.
- انتشار مقاله: 21-10-1396
- نویسندگان: Gagula Naveen Venkata Kishore,Bagathi Srinuvasa Rao,Stojan Radenovic,Huaping Huang
- مشاهده
- جایگاه : پژوهشی
- مجله: Sahand Communications in Mathematical Analysis
- نوع مقاله: Journal Article
- کلمات کلیدی: complete metric space,Common fixed point,$C$-class function,$\varphi $-weakly contractive conditions,Weakly compatible mappings
- چکیده:
- چکیده انگلیسی: In this paper, we discuss and extend some recent common fixed point results established by using $varphi-$weakly contractive mappings. A very important step in the development of the fixed point theory was given by A.H. Ansari by the introduction of a $C-$class function. Using $C-$class functions, we generalize some known fixed point results. This type of functions is a very important class of functions which contains almost all known type contraction starting from 1922. year, respectively from famous Banach contraction principle. Three common fixed point theorems for four mappings are presented. The obtained results generalizes several existing ones
in literature.We finally propose three open problems.- انتشار مقاله: 06-12-1395
- نویسندگان: Arslan Hojat Ansari,Tatjana Dosenovic,Stojan Radenovic,Jeong Sheok Ume
- مشاهده
- جایگاه : پژوهشی
- مجله: Sahand Communications in Mathematical Analysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Fixed point,$b$-metric space,Generalized $F$-Suzuki contraction
- چکیده:
- چکیده انگلیسی: Compared with the previous work, the aim of this paper is to introduce the more general concept of the generalized $F$-Suzuki type contraction mappings in $b$-metric spaces, and to establish some fixed point theorems in the setting of $b$-metric spaces. Our main results unify, complement and generalize the previous works in the existing literature.
- انتشار مقاله: 27-08-1395
- نویسندگان: Sumit Chandok,Huaping Huang,Stojan Radenović
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Nonlinear Analysis and Applications
- نوع مقاله: Journal Article
- کلمات کلیدی: Partially ordered set,Tripled coincidence point,$g$-monotone property
- چکیده:
- چکیده انگلیسی: In this paper, some recent results established by Marin Borcut [M. Borcut, Tripled fixed point theorems for monotone mappings in partially ordered metric spaces, Carpathian J. Math. 28, 2 (2012), 207--214] and [M. Borcut, Tripled coincidence theorems for monotone mappings in partially ordered metric spaces, Creat. Math. Inform. 21, 2 (2012), 135--142] are generalized and improved, with much shorter proofs. Also, examples are given to support these improvements.
- انتشار مقاله: 18-05-1393
- نویسندگان: Zoran Kadelburg,Stojan Radenovic
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Mathematical Finance and Application
- نوع مقاله: Journal Article
- کلمات کلیدی: Future Corporate,Risk-Taking Behavior,Financial Characteristics
- چکیده:
- چکیده انگلیسی: Organizational risk is often defined as a change in the flow of profit, or as a sys-tematic or non-systematic changes in the stock return flow. The risk taking of management is conceptualized as the actual investment decisions that are indictors due to uncertainty results. The purpose of this study is to investigate the effect of financial characteristics on future corporate risk taking behavior. After designing the indicators for assessing financial characteristics, the transaction data were collected from the Stock Exchange in the five-year period of 2011-2015. A sample of 111 companies was selected by sampling method based on the Cochran formula, which resulted in a total of 555 year-firm observations. In this study, linear regression and correlation were used to investigate the hypothesis, and for analyzing data and hypothesis testing, we used Eviews software. What can be said in the summing-up and conclusion of the general test of research hypotheses is that the disproportionate changes in sales costs, advertising costs, rental costs, liquidity, financial leverage, and disproportionate changes in capital costs have a positive impact on future corporate risk taking behavior. In addition, other results indicate a negative impact of disproportionate changes in sales growth, inventory, liquidity, and asset turnover on future corporate risk-taking behavior. The results obtained in this paper are consistent with the documentation referenced in the research's theoretical framework and financial literature..
- انتشار مقاله: 15-12-1396
- نویسندگان: Stojan Radenovic,Pejman Hasani
- مشاهده