University of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201Linear System of Equations with Doubly Stochastic Interval Coefficient Matrix17281310.22080/cjms.2020.19114.1530ENAzimRivazDepartment of Applied Mathematics, Shahid Bahonar University of
Kerman, Kerman, IranSomayehZangoei ZadehDepartment of Applied Mathematics, Shahid Bahonar University of
Kerman, Kerman, IranJournal Article20200622In this paper, we first give an overview of doubly stochastic interval matrices. Then, we present some theories about the interval linear system whose coefficient matrix is doubly stochastic interval matrix. Also, we give an outer estimation for the solution set of these systems.http://cjms.journals.umz.ac.ir/article_2813_e44b3158df5b38c997f1fee5cf52597b.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201Strongly hollow elements in the lattices817327810.22080/cjms.2021.20373.1563ENShahabaddinEbrahimi AtaniDepartment of Mathematics, University of Guilan, P.O.Box 1914, Rasht, Iran.MehdiKhoramdelDepartment of Mathematics, University of Guilan, P.O.Box 1914, Rasht, Iran.SabouraDolati Pish HesariDepartment of Mathematics, University of Guilan, P.O.Box 1914, Rasht, Iran.MahsaNikmard Rostam AlipourDepartment of Mathematics, University of Guilan, P.O.Box 1914, Rasht, Iran.Journal Article20201128Let $L$ be a lattice with the greatest element 1. Following the concept of strongly hollow elements of commutative rings, we define strongly hollow elements of lattices and we will make an intensive investigate the basic properties and possible structures of these elements.http://cjms.journals.umz.ac.ir/article_3278_319635c17b6b05b0459a10cc859abc7b.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201Berezin number inequalities involving superquadratic functions1827237910.22080/cjms.2019.17427.1434ENMehmetGurdalSuleyman Demirel University, Isparta, Turkey0000-0003-0866-1869NazanDumanSuleyman Demirel University, Isparta, TurkeyJournal Article20191024We consider superquadratic functions f and define selfadjoint operators f(A) from some selfadjoint operators A on a reproducing kernel Hilbert space H=H(Q). We estimate the so-called Berezin number of operator f(A).http://cjms.journals.umz.ac.ir/article_2379_8bf664bdae2cd4dc30f5f1ee228bd2b4.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201On a class of Kirchhoff type systems with singular nonlinearity2838327410.22080/cjms.2021.18811.1497ENSalehShakeriDepartment of Mathematics, Ayatollah Amoli Branch, Islamic Azad University ,
Amol, Iran0000-0003-2397-2542Journal Article20200516Using the method of sub-super solutions, we study the existence of<br /> positive solutions for a class of singular nonlinear semipositone<br /> systems involving nonlocal operator.http://cjms.journals.umz.ac.ir/article_3274_2cbf08c79c19666a9a7d031d6c428282.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201Coefficient estimates and Fekete-Szeg"{o} coefficient inequality for new subclasses of Bi-univalent3950327210.22080/cjms.2021.18442.1471ENHormozRahmatanDepartment of Mathematics, Faculty of Science, Payame Noor University, P.O.Box
19395-3697, Tehran, IranJournal Article20200320In this paper, we investigate two new subclasses $S^*_sigma(a, b)$ and $nu_sigma(a, b)$ of $sigma$ consisting of analytic and bi-univalent functions satisfying subordinations in the open unit disk $mathbb{U}$. We consider the Fekete-Szeg"{o} inequalities for these new subclasses. Also, we establish estimates for the coefficient for these subclasses.http://cjms.journals.umz.ac.ir/article_3272_725cc4449185c29a18af9abb625614b3.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201Some fixed point results for weakly $b-(varphi,G)$ contraction in $b-$metric spacs endowed with a graph5156327610.22080/cjms.2021.18834.1506ENHamidFarajiDepartment of Mathematics, College of Technical and Engineering, Saveh Branch, Islamic Azad
University, Saveh, Iran.0000-0002-5313-127XJournal Article20200518In this paper, we introduce the concept of weakly $b-(varphi,G)$ contraction mapping in $b$-metric spaces endowed with a graph and give some fixed point results for such contractions.http://cjms.journals.umz.ac.ir/article_3276_11cdf9bc586cc1d5195756025803eb97.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201On the D-concircular curvature tensor of a generalized Sasakian-Space-form5767251510.22080/cjms.2020.17388.1431ENAli AkbarHosseinzadehDepartment of Mathematics, University of Zabol, Zabol, IranJournal Article20191022The object of this paper is to study of D-concircular curvature tensor on generalized Sasakian-space-forms. Actually we consider generalized Sasakian-space-forms when it is, respectively: D-concircularly flat; D-concircular-pseudosymmetric; D-concircularly Ricci-semisymmetric; D-concircularly symmetric; $V (xi;X) .R = 0$. Most of the main results obtained in this paper are in the form of necessary and sufficient conditions.http://cjms.journals.umz.ac.ir/article_2515_d38a4aa1e6f8636b979eb3acb7e5e7a8.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201Application of spectral methods to solve nonlinear buckling analysis of an elastic beam6876327510.22080/cjms.2021.18815.1499ENAsiyehEbrahimzadehAssistent Professor, Department of Mathematics Education, Farhangian University, Tehran, IranSamanehPanjeh Ali BeikNational Center of Medical Education Assessment, Tehran, IranJournal Article20200517This study is concerned with exploiting the spectral method to solve the fourth-order boundary value problem (BVP). Such equations frequently arise in the study and modeling of large amplitude transverse buckling in an elastic beam. To this end, the properties of shifted Legendre polynomial together with its operational matrix of the derivative and the spectral method is utilized to reduce BVP to a system of algebraic equations. Numerical results turn out the efficiency and accuracy of the propounded technique.http://cjms.journals.umz.ac.ir/article_3275_88c8622f18da081291ae021d843b60e6.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201On BI-Ideal elements in POE-AG-Groupoid7784281910.22080/cjms.2020.17394.1433ENAlirezaShabaniDepartment of Mathematics Imam Khomaini Naval Academy, Nowshahr, IranMohammad AliShamalizadeImam Kamenei Complex, Imam Hossin Univirsity, Tehran, IranJournal Article20191022In this paper we introduce the concept of ideal and bi-ideal elements in poe-AG-groupoid and give some characterizations and properties of their bi-ideal elements. So we consider some results concerning bi-ideals in poe-semigroups and investigate them in poe-AG-groupoids. Also, the class of bi-ideal elements of poe-AG-groupoids are studied, certain intrinsic and basic properties of poe-AG-groupoids including:∧-semilattice, bi-ideal, semiprime, weaklyprime, totallyorderedelements and etc. are studied as well. The corresponding results on poe-semigroups can be also obtained as application of the results of this paper.http://cjms.journals.umz.ac.ir/article_2819_dc810ddd1fe3634a123c504640dbbb91.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201The induced contractive maps on the covering spaces8592281210.22080/cjms.2020.18710.1487ENZahraShabani SiahkaldeDepartment of Mathematics, Faculty of Mathematics, University of Sistan and Baluchestan, Zahedan, IranTayyebeNasriDepartment of Pure Mathematics, Faculty of Basic Sciences, University of Bojnord, Bojnord, IranJournal Article20200511 Let $(tilde{X},p)$ be the universal covering space of a compact metrizable space $ X $, which is compact and locally path connected. <br /> In this paper, we show that there exist metrics $ d $ and $ d' $ for $ X $ and $tilde{X} $, respectively, such that any contractive map $ f:Xto X $ induces a contractive map on $ tilde{X}$. As an application, it is obtained that every iterated function system(IFS) on the space $ X $ with attractor $ K $, induces an IFS on $tilde{ X} $ with attractor $tilde{K},$ such that $ p(tilde{K})=K$.http://cjms.journals.umz.ac.ir/article_2812_c40650d3fc7478acef86feb0450b3961.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201Existence and uniqueness of solutions for neutral periodic integro-differential equations with infinite delay on time scale93103328110.22080/cjms.2021.19819.1552ENHaithamMakhzoumDepartment of mathematic, Faculty of Science, University of Benghazi, Benghazi, Libya0000-0002-5381-0483Abdelhamid SElmabrokDepartment of Mathematics, Faculty of Science, University of Benghazi, Benghazi, Libya0000000233930277RafikElmansouriCollege of Electrical and Electronic Technology, Benghazi, LibyaJournal Article20200920In this article, we will shed the light on the following nonlinear neutral dynamic equation with infinite delay<br />begin{eqnarray*}label{e1}<br />{x(t)}^{Delta }=&& G(t, xleft(tright),xleft(t-tau left(tright)right))+{Q(t,x(t-tau (t)))}^{Delta }\<br />&&+int^t_{-infty }{left(sum^p_{i=1}{D_ileft(t,sright)}right)fleft(xleft(sright)right)}Delta s,<br />end{eqnarray*}<br />where $mathbb{T}$ is a periodic time scale. Using the fixed-point method by Krasnoselskii, we will show that equation has a periodic solution. In addition, we will prove this solution is unique by using the contraction mapping principle.<br /><br />http://cjms.journals.umz.ac.ir/article_3281_4b1b0d8f4c6f6d145328f83fbd24740b.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201Some results on Hermite-Hadamard type inequalities with respect to fractional integrals104111247110.22080/cjms.2020.17502.1437ENHassanBarsamDepartment of Mathematics, University of Jiroft, Jiroft, Kerman, IranMehrabRamezaniFaculty of Technology and Mining, Yasouj University, Choram, IranJournal Article20191031In this paper, we establish Hermite-Hadamard type inequalities for uniformly p-convex<br /> functions. Also, a new fractional Hermite-Hadamard type inequality<br /> for convex functions is obtained by using only the left Riemann-Liouville fractional<br /> integral. Finally some extimation of left fractional integration studies for Hermite-<br /> Hadamard type inequalities.http://cjms.journals.umz.ac.ir/article_2471_267fbb8af6783ad542eebde244ee26c3.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201Group analysis of time-fractional equation with Riemann-Liouville derivative112120242510.22080/cjms.2019.17364.1429ENNematollahKadkhodaDepartment of Mathematics, Faculty of Basic Sciences, Bozorgmehr
University of Qaenat, Qaenat, IranMortezaKoozehgar KallejiDepartment of Mathematics, Faculty of Sciences, Arak University,
Arak 38156-8-8349, IranYasserKhaliliDepartment of Basic Sciences, Sari Agricultural Sciences and Natural
Resources University, 578 Sari, IranJournal Article20191014Finding Lie symmetries of nonlinear fractional differential equations plays an important role in studying fractional differential equations. The purpose of this manuscript is to find the<br /> Lie point symmetries of the time-fractional Buckmaster equation. After that we use the innitesimal generators for obtaining their corresponding invariant solutions.http://cjms.journals.umz.ac.ir/article_2425_5599630a7a9e3c37a671fea24d362c0f.pdfUniversity of MazandaranCaspian Journal of Mathematical Sciences (CJMS)peer2676-726010120211201F -Sums of Graphs and their Reformulated-Zagreb Indices121133258810.22080/cjms.2020.13285.1329ENKPattabiramanDepartment of Mathematics,
Government Arts , College(Autonomous)
Kumbakonam 612 002,
IndiaASanthakumarDepartment of Mathematics,
CK College of Engineering and Technology,
Cuddalore,
IndiaJournal Article20171208The reformulated Zagreb index EM1(G) of a simple graph G is defined as the sum of the<br /> terms (du + dv − 2)2 over all edges uv of G. In this paper, we study the reformulated Zagreb<br /> indices for the F -sums of some special well-known graphs such as subdivision and total graph<br /> which is introduced by Eliasi and Taeri [2].http://cjms.journals.umz.ac.ir/article_2588_b48dd9a57b074add95b6056969e30a1c.pdf