2018-10-21T07:03:45Z
http://jmmrc.uk.ac.ir/?_action=export&rf=summon&issue=250
Journal of Mahani Mathematical Research Center
J. Mahani Math. Res. Cent.
2251-7952
2251-7952
2016
5
1
ENTROPY OF GEODESIC FLOWS ON SUBSPACES OF HECKE SURFACE WITH ARITHMETIC CODE
SANAZ
LAMEI
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.
topological entropy
arithmetic coding
Hecke surface
2016
01
26
1
7
http://jmmrc.uk.ac.ir/article_1553_19c2cc09ba259bda9cb913358aab9de0.pdf
Journal of Mahani Mathematical Research Center
J. Mahani Math. Res. Cent.
2251-7952
2251-7952
2016
5
1
BIFURCATION ANALYSIS OF A DDE MODEL OF THE CORAL REEF
HANIYEH
FATTAHPOUR
HAMID
R. Z. ZANGENEH
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.
Ordinary differential equation
Delay differential equation
Stability
Hopf bifurcation
periodic solution
2017
02
01
9
25
http://jmmrc.uk.ac.ir/article_1555_26033d7ca0b12f03e32e20fef1ffe98b.pdf
Journal of Mahani Mathematical Research Center
J. Mahani Math. Res. Cent.
2251-7952
2251-7952
2016
5
1
PRECOMPACT TOPOLOGICAL GENERALIZED GROUPS
M. R.
AHMADI ZAND
S.
ROSTAMI
In this paper, we introduce and study the notion of precompacttopological generalized groups and some new results are given.
Generalized group
precompact topological generalized group
paratopological generalized group
2017
02
22
27
32
http://jmmrc.uk.ac.ir/article_1565_ce645c755bc3c44bd2ed48146cedc13b.pdf
Journal of Mahani Mathematical Research Center
J. Mahani Math. Res. Cent.
2251-7952
2251-7952
2016
5
1
A THREE DIMENSIONAL HTLV-1 MODEL WITH INTRACELLULAR AND IMMUNE ACTIVATION DELAYS
ELHAM
SHAMSARA
ZAHRA
AFSHARNEZHAD
JAMAL
SHAMSARA
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.
CTL response
Graphical Hopf bifurcation theorem
Fre-
quency domain
Delay dierential equation
HTLV-1 infection
2017
02
22
33
50
http://jmmrc.uk.ac.ir/article_1566_1664a3f634ab76ac05f2287dbd01ef77.pdf