Kragujevac Journal of Mathematics
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Published By Centre For Evaluation In Education And Science

2406-3045, 1450-9628

2021 ◽  
Vol 45 (6) ◽  
pp. 925-941
Author(s):  
DEBAPRIYA BISWAS ◽  
◽  
SANDIPAN DUTTA

In this paper we have introduced new invariant geometric objects in the homogeneous spaces of complex, dual and double numbers for the principal group SL(2; ℝ), in the Klein’s Erlangen Program. We have considered the action as the Möbius action and have taken the spaces as the spaces of complex, dual and double numbers. Some new decompositions of SL(2; ℝ) have been used.


2021 ◽  
Vol 45 (6) ◽  
pp. 969-975
Author(s):  
SAMIRA SABETI ◽  
◽  
AKRAM BANIHASHEMI DEHKORDI ◽  
SAEED MOHAMMADIAN SEMNANI

In this paper, we introduce a new kind of graph energy, the minimum edge covering energy, ECE(G). It depends both on the underlying graph G, and on its particular minimum edge covering CE. Upper and lower bounds for ECE(G) are established. The minimum edge covering energy and some of the coefficients of the polynomial of well-known families of graphs like Star, Path and Cycle Graphs are computed


2021 ◽  
Vol 45 (6) ◽  
pp. 977-994
Author(s):  
SHOKOOFEH GHORBANI ◽  
Keyword(s):  

In this paper, we study the concept of pseudo commutative double basic algebras and investigate some related results. We prove that there are relations among pseudo commutative double basic algebras and other logical algebras such as pseudo hoops, pseudo BCK-algebras and double MV-algebras. We obtain a close relation between pseudo commutative double basic algebras and pseudo residuted l-groupoids. Then we investigate the properties of the boolean center of pseudo commutative double basic algebras and we use the boolean elements to define and study algebras on subintervals of pseudo commutative double basic algebras.


2021 ◽  
Vol 45 (6) ◽  
pp. 943-950
Author(s):  
ABDELKARIM BOUA ◽  
Keyword(s):  

2021 ◽  
Vol 45 (6) ◽  
pp. 859-872
Author(s):  
WASEEM A. KHAN ◽  
◽  
DIVESH SRIVASTAVA

This paper is well designed to set-up some new identities related to generalized Apostol-type Hermite-based-Frobenius-Genocchi polynomials and by applying the generating functions, we derive some implicit summation formulae and symmetric identities. Further a relationship between Array-type polynomials, Apostol-type Bernoulli polynomials and generalized Apostol-type Frobenius-Genocchi polynomials is also established.


2021 ◽  
Vol 45 (6) ◽  
pp. 873-880
Author(s):  
SAMIR K. VAIDYA ◽  
◽  
KALPESH M. POPAT

If a graph G of order n has the Laplacian energy same as that of complete graph Kn then G is said to be L-borderenergeic graph. It is interesting and challenging as well to identify the graphs which are L-borderenergetic as only few graphs are known to be L-borderenergetic. In the present work we have investigated a sequence of L-borderenergetic graphs and also devise a procedure to find sequence of L-borderenergetic graphs from the known L-borderenergetic graph.


2021 ◽  
Vol 45 (6) ◽  
pp. 881-896
Author(s):  
Sayed SABER ◽  

This paper is devoted to studying some applications of the Bochner-Kodaira-Morrey-Kohn identity. For this study, we define a condition which is called (Hq) condition which is related to the Levi form on the complex manifold. Under the (Hq) condition and combining with the basic Bochner-Kodaira-Morrey-Kohn identity, we study the L2 ∂ Cauchy problems on domains in ℂn, Kähler manifold and in projective space. Also, we study this problem on a piecewise smooth strongly pseudoconvex domain in a complex manifold. Furthermore, the weighted L2 ∂ Cauchy problem is studied under the same condition in a Kähler manifold with semi-positive holomorphic bisectional curvature. On the other hand, we study the global regularity and the L2 theory for the ∂-operator with mixed boundary conditions on an annulus domain in a Stein manifold between an inner domain which satisfy (Hn−q−1) and an outer domain which satisfy (Hq).


2021 ◽  
Vol 45 (6) ◽  
pp. 951-968
Author(s):  
RAZIEH KAVEHSARCHOGHA ◽  
◽  
REZA EZZATI ◽  
NASRIN KARAMIKABIR ◽  
FARAJOLLAH MOHAMMADI YAGHOBBI

The method that will be presented, is numerical solution based on the Legendre wavelets for solving dual systems of fractional integro-differential equations (FIDEs). First of all we make the operational matrix of fractional order integration. The application of this matrix is transforming FIDEs to a system of algebric equations. By this changing, we are able to solve it by a simple solution. In this way, the Legendre wavelets and their operator matrix are the most important keys of our solution. After explaining the method we test on some illustrative examples which numerical solutions of these examples demonstrate the validity and applicability of suggested method.


2021 ◽  
Vol 45 (6) ◽  
pp. 909-923
Author(s):  
MOHAMED A. E. HERZALLAH ◽  
◽  
ASHRAF H. A. RADWAN

The purpose of this paper is to investigate the existence and uniqueness of mild solutions to a semilinear Cauchy problem for an abstract fractional differential equation with state dependent nonlocal condition. Continuous dependence of solutions on initial conditions and local ????-approximate mild solution of the considered problem will be discussed.


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