Mathematics, Statistics & Physics: المرسلات الحديثة
السجلات المعروضة 221 -- 240 من 728
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On strongly generalized convex stochastic processes
( Taylor and Francis Ltd. , 2022 , Article)In this paper, we introduce the notion of strongly generalized convex functions which is called as strongly η-convex stochastic processes. We prove the Hermite-Hadamard, Ostrowski type inequality, and obtain some important ... -
Penalty ADM Algorithm for Cardinality Constrained Mean-Absolute Deviation Portfolio Optimization
( International Academic Press , 2022 , Article)In this paper, we study the cardinality constrained mean-absolute deviation portfolio optimization problem with risk-neutral interest rate and short-selling. We enhance the model by adding extra constraints to avoid investing ... -
A penalty decomposition algorithm for the extended mean-variance-CVaR portfolio optimization problem
( World Scientific , 2023 , Article)In this paper, we study mean-variance-Conditional Value-At-Risk (CVaR) portfolio optimization problem with short selling, cardinality constraint and transaction costs. To tackle its mixed-integer quadratic optimization ... -
Two-factor Heston model equipped with regime-switching: American option pricing and model calibration by Levenberg-Marquardt optimization algorithm
( Elsevier B.V. , 2023 , Article)In this paper, we consider the pricing of American options under a regime-switching double Heston model, such that the interest rate and mean-reversion level parameters in both stochastic volatility models shift in various ... -
Some new integral inequalities for higher-order strongly exponentially convex functions
( Institute for Ionics , 2023 , Article)Integral inequalities with generalized convexity play an important role in both applied and theoretical mathematics. The theory of integral inequalities is currently one of the most rapidly developing areas of mathematics ... -
Hermite-Hadamard and Fejer-type inequalities for generalized η-convex stochastic processes
( Taylor and Francis Ltd. , 2023 , Article)In this article, we introduce the concept of (Formula presented.) -convex stochastic processes on coordinates and establish Hermite-Hadamard-type inequality for these stochastic processes. Moreover, we prove new integral ... -
Some Majorization Integral Inequalities for Functions Defined on Rectangles Via Strong Convexity
( Ilirias Research Institute , 2019 , Article)In this paper, we have extended some integral majorization types and generalized Favard’s inequalities from functions defined on intervals to functions defined on rectangles via strong convexity and apply the results to ... -
Herd immunity against severe acute respiratory syndrome coronavirus 2 infection in 10 communities, qatar
( Centers for Disease Control and Prevention (CDC) , 2021 , Article)We investigated what proportion of the population acquired severe acute respiratory syndrome coronavirus 2 (SARSCoV- 2) infection and whether the herd immunity threshold has been reached in 10 communities in Qatar. The ... -
Estimates of global SARS-CoV-2 infection exposure, infection morbidity, and infection mortality rates in 2020
( Elsevier , 2021 , Article)We aimed to estimate, albeit crudely and provisionally, national, regional, and global proportions of respective populations that have been infected with SARS-CoV-2 in the first year after the introduction of this virus ... -
Distinct Clinical and Prognostic Features of Myelodysplastic Syndrome in Patients from the Middle East, North Africa, and Beyond: A Systemic Review
( Multidisciplinary Digital Publishing Institute (MDPI) , 2023 , Article)Myelodysplastic syndrome (MDS) describes a group of bone marrow malignancies with variable morphologies and heterogeneous clinical features. The aim of this study was to systematically appraise the published clinical, ... -
Association of single nucleotide polymorphisms with dyslipidemia and risk of metabolic disorders in the State of Qatar
( Wiley-Blackwell , 2023 , Article)Background: Dyslipidemia is recognized as one of the risk factors of cardiovascular diseases (CVDs), type 2 diabetes mellitus (T2DM), and non-alcoholic fatty liver disease (NAFLD). Objective: The study aimed to investigate ... -
Structural influence of chromium substituted magnetite ferrofluids on the optical and antibacterial characteristics
( Elsevier Ltd , 2023 , Article)A series of chromium substituted magnetite (CrxFe1?xFe2O4) ferrofluids with various concentrations ranging from x = 0-0.8 is reported in this work. Simple, cost effective and gentle co-precipitation method is followed for ... -
Correlating the rheological and magneto-optical properties of cobalt substituted magnetite ferrofluids (CoxFe1?xFe2O4) with theoretical studies
( Elsevier B.V. , 2023 , Article)Magnetite ferrofluids are widely reported due to their outstanding physicochemical, magnetic and antibacterial properties. This study focusses on the synthesis of magnetite ferrofluids and the effect of Co2+ substitution ... -
Molybdenum oxide reinforced polyvinyl alcohol composite as high-performance dielectric material for flexible electronics
( Springer , 2023 , Article)Polymer dielectrics are highlighted as capable energy storing materials due to their better dielectric strength and supreme versatility compared to inorganic ceramic dielectrics in sophisticated electronics and pulsed power ... -
Coupled coincidence point results for (ψ,φ) -weakly contractive mappings in partially ordered Gb-metric spaces
( Hindawi Publishing Corporation , 2013 , Article)In this paper we present some coupled coincidence point results for (ψ,φ) -weakly contractive mappings in the setup of partially ordered Gb -metric spaces. Our results extend the results of Cho et al. (Fixed Point Theory ... -
Some fixed and periodic point results for generalized contractions on partial ordered metric space with applications in metric space
( Boletim da Sociedade Paranaense de Matematica , 2021 , Article)In this paper, we introduce new type of Θ-contraction in termof a self-mapping on a metric space to obtain common fixed point results. Some examples arealso provided to support the validity of our results and concepts ... -
Common fixed point theorems for two pairs of self-mappings in partial metric space using C-class functions on (ψ, ϕ)-contractive condition
( International Scientific Research Publications , 2018 , Article)The purpose of this paper is to introduce common fixed point results for two pairs of weakly compatible self-mappings in partial metric space using C-class functions on (ψ, ϕ)-contractive condition. Example and application ... -
Extremal number of theta graphs of order 7
( Boletim da Sociedade Paranaense de Matematica , 2021 , Article)For a set of graphsF, letH(n;F) denote the class of non-bipartiteHamiltonian graphs onnvertices that does not contain any graph ofFas a subgraphandh(n;F) = max{E(G) :G∈H(n;F)}whereE(G) is the number of edges inG.In this ... -
Solving a class of integral equations via contractive mapping with rational type
( New York Business Global , 2020 , Article)In this paper, using rational type contractive conditions, the existence and uniqueness of common coupled fixed point theorem in the set up of Gb-metric spaces is studied. The derived result cover and generalize some ... -
Some remarks concerning D∗-metric spaces
( International Scientific Research Publications , 2020 , Article)In [S. Sedghi, N. Shobe, H. Y. Zhou, Fixed Point Theory Appl., 2007 (2007), 13 pages], Sedghi et al. introduced the notion of D∗ -metric space and in [S. Sedghi, N. Shobe, A. Aliouche, Mat. Vesnik, 64 (2012), 258–266] the ...