ENTROPY OF GEODESIC FLOWS ON SUBSPACES OF HECKE SURFACE WITH ARITHMETIC CODE
SANAZ
LAMEI
DEPARTMENT OF MATHEMATICAL SCIENCES, GUILAN UNIVERSITY
author
text
article
2016
eng
There are dierent ways to code the geodesic flows on surfaces with negative curvature. Such code spaces give a useful tool to verify the dynamical properties of geodesic flows. Here we consider special subspaces of geodesic flows on Hecke surface whose arithmetic codings varies on a set with innite alphabet. Then we will compare the topological complexity of them by computing their topological entropies.
Journal of Mahani Mathematical Research Center
Shahid Bahonar University of Kerman
2251-7952
5
v.
1
no.
2016
1
7
http://jmmrc.uk.ac.ir/article_1553_19c2cc09ba259bda9cb913358aab9de0.pdf
dx.doi.org/10.22103/jmmrc.2016.1553
BIFURCATION ANALYSIS OF A DDE MODEL OF THE CORAL REEF
HANIYEH
FATTAHPOUR
DEPARTMENT OF MATHEMATICAL SCIENCES, ISFAHAN UNIVERSITY OF
TECHNOLOGY, ISFAHAN, IRAN, 84156-83111
author
HAMID
R. Z. ZANGENEH
DEPARTMENT OF MATHEMATICAL SCIENCES, ISFAHAN UNIVERSITY OF
TECHNOLOGY, ISFAHAN, IRAN, 84156-83111
author
text
article
2017
eng
In this paper, first we discuss a local stability analysis of model was introduced by P. J. Mumby et. al. (2007), with $\frac{gM^{2}}{M+T}$ as the functional response term. We conclude that the grazing intensity is the important parameter to control the existence or extinction of the coral reef. Next, we consider this model under the influence of the time delay as the bifurcation parameter. We show that for small time delay, the stability type of the equilibria will not change, however for large enough time delay, the interior equilibrium point become unstable in contrast to the ODE case. Also for some critical grazing intensity and the time delay, a Hopf bifurcation occur and a nontrivial periodic orbit will appear. Further we discuss its corresponding stability switching directions.
Journal of Mahani Mathematical Research Center
Shahid Bahonar University of Kerman
2251-7952
5
v.
1
no.
2017
9
25
http://jmmrc.uk.ac.ir/article_1555_26033d7ca0b12f03e32e20fef1ffe98b.pdf
dx.doi.org/10.22103/jmmrc.2017.1555
PRECOMPACT TOPOLOGICAL GENERALIZED GROUPS
M. R.
AHMADI ZAND
DEPARTMENT OF MATHEMATICS, YAZD UNIVERSITY, YAZD, IRAN
author
S.
ROSTAMI
DEPARTMENT OF MATHEMATICS, YAZD UNIVERSITY, YAZD, IRAN
author
text
article
2017
eng
In this paper, we introduce and study the notion of precompacttopological generalized groups and some new results are given.
Journal of Mahani Mathematical Research Center
Shahid Bahonar University of Kerman
2251-7952
5
v.
1
no.
2017
27
32
http://jmmrc.uk.ac.ir/article_1565_ce645c755bc3c44bd2ed48146cedc13b.pdf
dx.doi.org/10.22103/jmmrc.2017.1565
A THREE DIMENSIONAL HTLV-1 MODEL WITH INTRACELLULAR AND IMMUNE ACTIVATION DELAYS
ELHAM
SHAMSARA
DEPARTMENT OF APPLIED MATHEMATICS, FACULTY OF
MATHEMATICAL SCIENCES, FERDOWSI UNIVERSITY OF MASHHAD
(FUM), MASHHAD, IRAN.
author
ZAHRA
AFSHARNEZHAD
DEPARTMENT OF APPLIED MATHEMATICS, FACULTY OF
MATHEMATICAL SCIENCES, FERDOWSI UNIVERSITY OF MASHHAD
(FUM), MASHHAD, IRAN.
author
JAMAL
SHAMSARA
PHARMACEUTICAL RESEARCH CENTER, SCHOOL OF PHARMACY,
MASHHAD UNIVERSITY OF MEDICAL SCIENCES, MASHHAD, IRAN.
author
text
article
2017
eng
In this paper, a three dimensional mathematical model for HTLV-1infection with intracellular delay and immune activation delay is investigated.By applying the frequency domain approach, we show that time delays candestabilize the HAM/TSP equilibrium, leading to Hopf bifurcations and sta-ble or unstable periodic oscillations. At the end, numerical simulations areillustrated.
Journal of Mahani Mathematical Research Center
Shahid Bahonar University of Kerman
2251-7952
5
v.
1
no.
2017
33
50
http://jmmrc.uk.ac.ir/article_1566_1664a3f634ab76ac05f2287dbd01ef77.pdf
dx.doi.org/10.22103/jmmrc.2017.1566