i-manager's Journal on Mathematics (JMAT)


Volume 8 Issue 3 July - September 2019

Research Paper

2-HH Norm and Birkhoff-James Orthogonality in Normed Spaces

Bhuwan Prasad Ojha* , Prakash Muni Bajracharya**
*-** Department of Mathematics at Tribhuvan University, Kathmandu, Nepal.
Ojha, B. P., and Bajracharya, P. M. (2019). 2-HH Norm and Birkhoff-James Orthogonality in Normed Spaces. i-manager's Journal on Mathematics, 8(3), 1-9. https://doi.org/10.26634/jmat.8.3.16746

Abstract

For any normed space X, the p-HH norms X were introduced by Kikianty and Dragomir on X2 = X x X of normed spaces. p- norms and p-HH norms induce the same topology, so they are equivalent, but are geometrically different. Besides that, E. Kikianty and S. S. Dragimor introduced HH-P orthogonality and HH-I orthogonality by using 2-HH norm and discussed main properties of these orthogonalities. The main purpose of this paper is to focus on the concept of 2-HH norm to Birkhoff and a new orthogonality in normed spaces, and we discuss some properties of these orthogonalities. It is proved that Robert orthogonality via 2-HH norm implies Birkhoff-James orthogonality via 2-HH norm; however, it is not necessary for the converse part.

Research Paper

Modified Intuitionistic M-Fuzzy Metric Space and Some Common Fixed-Point Theorems

Dr Pranjali* , Shailesh Dhar Diwan**
* Department of Applied Mathematics, Shri Shankaracharya Institute of Professional Management and Technology, Raipur, Chhattisgarh, India.
** Department of Applied Mathematics, Government Engineering College, Raipur, Chhattisgarh, India.
Sharma, P., and Diwan, S. D. (2019). Modified Intuitionistic M-Fuzzy Metric Space and Some Common Fixed-Point Theorems. i-manager's Journal on Mathematics, 8(3), 10-16. https://doi.org/10.26634/jmat.8.3.16954

Abstract

In this paper, we modified the idea of M-fuzzy metric space defined in the work “A common fixed point theorem in two M- fuzzy metric spaces” by Sedghi and Shobein, published in the year 2007, with intuitionistic fuzzy metric space and we present the notion of modified intuitionistic M-fuzzy metric space with the help of continuous t-representable. We also prove some common fixed-point theorems for modified intuitionistic M-fuzzy metric space.

Research Paper

Dynamics of Delayed Sirs Epidemic Model with a Non-Linear Incidence Rate

Appa Rao Dokala* , Shaik Kalesha Vali S. **, Papa Rao A. V.***
* Department of Mathematics, IIIT Srikakulam, RGUKT, Andhra Pradesh, India.
**-*** Department of Mathematics, JNTUK, University College of Engineering, Vizianagaram, Andhra Pradesh, India.
Dokala, A. R., Vali, S. K., and Rao, P. A. V. (2019). Dynamics of Delayed Sirs Epidemic Model with a Non-Linear Incidence Rate. i-manager's Journal on Mathematics, 8(3), 17-27. https://doi.org/10.26634/jmat.8.3.16707

Abstract

In this work, we consider an SIRS epidemic model with a non-linear incidence rate with time delay. The time delay is incorporated in susceptible population with the interaction of susceptible (S) and removable (R) population. We also induce the saturated incidence rate in S, R population. By analyzing the model, the local stability of an endemic equilibrium point is discussed. The system undergoes Hopf bifurcation. The analytical results are supported with numerical simulation using MATLAB and it is shown that the system is locally asymptotically stable and exhibit Hopf bifurcation.

Research Paper

Flexural Vibration of Piezo Electric Solid Cylinder of Class 6-Human Bone

E. S. Nehru *
Department of Mathematics, Colleges of Engineering and Universities in India, Oman, Saudi Arabia, and Bahrain.
Nehru, E. S. (2019). Flexural Vibration of Piezo Electric Solid Cylinder of Class 6-Human Bone. i-manager's Journal on Mathematics, 8(3), 28-34. https://doi.org/10.26634/jmat.8.3.17061

Abstract

This paper presents a Flexural vibration of Piezo Electric Solid Cylinder of Class 6-Human Bone. The frequency equations are obtained for the traction free surfaces with continuity condition at the interfaces. The boundary conditions are solved by using Fourier Collocation Method. The frequency equation is solved by using Muller's Method. In this paper, we have studied about the attenuation effect and Vibration characteristic for different wave numbers. Numerical results are carried out for the Human Bone material constants and the dispersion curves are compared with that of a solid piezoelectric cylinder and a similar model embedding a Carban Fiber Reinforced Plastic (CFRP) and Linear Elastics Material with Voids (LEMV).

Research Paper

Dynamics of a Prey and Two Predators with Time Delay in Prey Species

G. A. L. Satyavathi* , Paparao A. V.**, Sobhan Babu K.***
* Research Scholar, JNTUK, Kakinada, Andhra Pradesh, India.
** Department of Mathematics, JNTUK, University College of Engineering (UCE), Vizianagaram, Andhra Pradesh, India.
*** Department of Mathematics, JNTUK, University College of Engineering Narasaraopet (UCEN), Andhra Pradesh, India.
Satyavathi, G. A. L., Paparao, A. V., and Babu, S. K. (2019). Dynamics of a Prey and Two Predators with Time Delay in Prey Species. i-manager's Journal on Mathematics, 8(3), 35-45. https://doi.org/10.26634/jmat.8.3.17123

Abstract

We describe a mathematical model for a three species ecological model which consists a prey (x1) and two neutral predators (x2, x3), surviving on the common prey (x1). Here all the three species have limited own natural resources. A Distributed type of delay is included in the prey (x1) species. The system is described by a couple of integro differential equations. The co-existing state is identified and the local stability analysis is studied at this state. Global stability is assured by choosing suitable Lyapunov's function. The effect of time delay is studied using Numerical simulation with different kernel strengths and it is proved that delays destabilizes the system.