@Article{Pal2017,
author="Pal, Buddhadev
and Bhattacharyya, Arindam
and Dey, Santu",
title="Warped product and quasi-Einstein metrics",
journal="Caspian Journal of Mathematical Sciences (CJMS)",
year="2017",
volume="6",
number="1",
pages="1-8",
abstract="Warped products provide a rich class of physically significant geometric objects. Warped product construction is an important method to produce a new metric with a base manifold and a fibre. We construct compact base manifolds with a positive scalar curvature which do not admit any non-trivial quasi-Einstein warped product, and non compact complete base manifolds which do not admit any non-trivial Ricci-flat quasi-Einstein warped product",
issn="1735-0611",
doi="10.22080/cjms.2017.1635",
url="http://cjms.journals.umz.ac.ir/article_1635.html"
}
@Article{Hejazi2017,
author="Hejazi, S. Reza",
title="Reduction of Differential Equations by Lie Algebra of Symmetries",
journal="Caspian Journal of Mathematical Sciences (CJMS)",
year="2017",
volume="6",
number="1",
pages="9-30",
abstract="The paper is devoted to an application of Lie group theory to differential equations. The basic infinitesimal method for calculating symmetry group is presented, and used to determine general symmetry group of some differential equations. We include a number of important applications including integration of ordinary differential equations and finding some solutions of partial differential equations together with some examples. A Bianchi theorem for the solvable symmetry groups is given to reduce a system of ordinary differential equations.",
issn="1735-0611",
doi="10.22080/cjms.2017.1636",
url="http://cjms.journals.umz.ac.ir/article_1636.html"
}
@Article{Önder2017,
author="Önder, Mehmet
and Kaya, Onur",
title="Characterizations of Slant Ruled Surfaces in the Euclidean 3-space",
journal="Caspian Journal of Mathematical Sciences (CJMS)",
year="2017",
volume="6",
number="1",
pages="31-46",
abstract="In this study, we give the relationships between the conical curvatures of ruled surfaces generated by the unit vectors of the ruling, central normal and central tangent of a ruled surface in the Euclidean 3-space E^3. We obtain differential equations characterizing slant ruled surfaces and if the reference ruled surface is a slant ruled surface, we give the conditions for the surfaces generated by central normal and central tangent vectors to be slant ruled surfaces.",
issn="1735-0611",
doi="10.22080/cjms.2017.1637",
url="http://cjms.journals.umz.ac.ir/article_1637.html"
}
@Article{Neamaty2017,
author="Neamaty, A.
and Khalili, Y.",
title="On the determination of eigenvalues for differential pencils with the turning point",
journal="Caspian Journal of Mathematical Sciences (CJMS)",
year="2017",
volume="6",
number="1",
pages="47-53",
abstract="In this paper, we investigatethe boundary value problem for differential pencils on the half-linewith a turning point. Using a fundamental system of solutions, wegive a asymptotic distribution of eigenvalues.",
issn="1735-0611",
doi="10.22080/cjms.2017.1644",
url="http://cjms.journals.umz.ac.ir/article_1644.html"
}
@Article{R.Ghasemkhani2017,
author="R. Ghasemkhani, R.
and Mohammadi, u.",
title="A local approach to the entropy of countable fuzzy partitions",
journal="Caspian Journal of Mathematical Sciences (CJMS)",
year="2017",
volume="6",
number="1",
pages="54-61",
abstract="This paper denes and investigates the ergodic proper-ties of the entropy of a countable partition of a fuzzy dynamical sys-tem at different points of the state space. It ultimately introducesthe local fuzzy entropy of a fuzzy dynamical system and proves itto be an isomorphism invariant.",
issn="1735-0611",
doi="10.22080/cjms.2017.1646",
url="http://cjms.journals.umz.ac.ir/article_1646.html"
}