Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
Fixed point theorems for weakly contractive mappings on g-Metric spaces and a homotopy result
1
8
EN
A
Erduran
Department of Mathematics, Faculty of Science and Arts, Kirikkale Univer-
sity, 71450 Yahsihan, Kirikkale, Turkey.
I.
Altun
Department of Mathematics, Faculty of Science and Arts, Kirikkale Univer-
sity, 71450 Yahsihan, Kirikkale, Turkey.
10.22075/ijnaa.2012.33
In this paper, we give some xed point theorems for '-weak contractivetype mappings on complete G-metric space, which was given by Zaed andSims [1]. Also a homotopy result is given.
fixed point,weakly contractive maps,G-metric space
http://ijnaa.semnan.ac.ir/article_33.html
http://ijnaa.semnan.ac.ir/article_33_5d27d2d7815f20f0b239f934a9ef2bef.pdf
Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
Weak and strong convergence theorems for a finite family of generalized asymptotically quasinonexpansive nonself-mappings
9
16
EN
P.
Yatakoat
Department of Mathematics, Faculty of Science, Chiang Mai University, Chiang
Mai 50200, Thailand
S.
Suantai
Department of Mathematics, Faculty of Science, Chiang Mai University, Chiang
Mai 50200, Thailand
10.22075/ijnaa.2012.35
In this paper, we introduce and study a new iterative scheme toapproximate a common xed point for a nite family of generalized asymptoticallyquasi-nonexpansive nonself-mappings in Banach spaces. Several strong and weakconvergence theorems of the proposed iteration are established. The main resultsobtained in this paper generalize and rene some known results in the currentliterature.
Generalized asymptotically quasi-nonexpansive nonself-mappings,Common xed points,Weak and Strong convergence
http://ijnaa.semnan.ac.ir/article_35.html
http://ijnaa.semnan.ac.ir/article_35_cc8eb19482ddfa3a8c2957b6c9ae79b0.pdf
Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
A unique common fixed point theorem for six maps in g-metric spaces
17
23
EN
K. P. R.
Rao
Department of Applied Mathematics, Acharya Nagarjuna University-Dr.M.R.
Appa Row Campus, Nuzvid-521 201,Andhra Pradesh,India
K. B.
Lakshmi
Department of Applied Mathematics, Acharya Nagarjuna University-Dr.M.R.
Appa Row Campus, Nuzvid-521 201,Andhra Pradesh,India
Z.
Mustafa
Department of Mathematics, The Hashemite University, P.O. 330127, Zarqa
13115,Jordan
10.22075/ijnaa.2012.37
In this paper we obtain a unique common xed point theorem for sixweakly compatible mappings in G-metric spaces.
G-metric,Common xed points,compatible mappings
http://ijnaa.semnan.ac.ir/article_37.html
http://ijnaa.semnan.ac.ir/article_37_3186ecfa468d8087bed847669f25a299.pdf
Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
Common fixed point of generalized ($psi$-$varphi$)-weak contraction mappings
24
30
EN
S.
Moradi
Department of Mathematics, Faculty of Science, Arak University, Arak, 38156-
8-8349, Iran.
E.
Analoei
Department of Mathematics, Faculty of Science, Arak University, Arak, 38156-
8-8349, Iran.
10.22075/ijnaa.2012.38
Let (X; d) be a complete metric space and let f; g : X ! X betwo mappings which satisfy a ( ')-weak contraction condition or generalized( ')-weak contraction condition. Then f and g have a unique common xedpoint. Our results extend previous results given by Ciric (1971), Rhoades (2001),Branciari (2002), Rhoades (2003), Abbas and Ali Khan (2009), Zhang and Song(2009) and Moradi at. el. (2011).
fixed point,coincidence point,weakly compatible
http://ijnaa.semnan.ac.ir/article_38.html
http://ijnaa.semnan.ac.ir/article_38_bc12a81ea379a60d40d09280eee88e42.pdf
Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
On the fine spectra of the Zweier matrix as an operator over the weighted sequence space $l_{p}(w)$
31
39
EN
R.
Lashkaripour
Department of Mathematic, Faculty of Mathematics, University of Sistan and
Baluchestan, Zahedan, Iran.
J.
Fathi
Department of Mathematic, Faculty of Mathematics, University of Sistan and
Baluchestan, Zahedan, Iran.
10.22075/ijnaa.2012.42
In the present paper, the ne spectrum of the Zweier matrix as anoperator over the weighted sequence space `p(w); have been examined.
Spectrum of an operator,matrix mapping,Zweier matrix,weighted
sequence space
http://ijnaa.semnan.ac.ir/article_42.html
http://ijnaa.semnan.ac.ir/article_42_da5de63049690b6304c4d6ef0a6ae203.pdf
Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
On the approximate solution of Hosszus
functional equation
40
44
EN
B.
Bouikhalene
Laboratory LIRST, Polydisciplinary Faculty, Departement of Mathematics,
University Sultan Moulay Slimane, Beni-Mellal Morocco.
J. M.
Rassias
National and Capodistrian University of Athens, Section of Mathematics and
Informatics, 4, Agamemnonos Str., Aghia Paraskevi, Athens 15342, Greece.
A.
Charifi
Faculty of sciences, Departement of Mathematics, University of Ibn Tofail,
Kenitra, Morocco.
S.
Kabbaj
Faculty of sciences, Departement of Mathematics, University of Ibn Tofail,
Kenitra, Morocco.
10.22075/ijnaa.2012.45
We show that every approximate solution of the Hosszu's functionalequationf(x + y + xy) = f(x) + f(y) + f(xy) for any x; y 2 R;is an additive function and also we investigate the Hyers-Ulam stability of thisequation in the following settingjf(x + y + xy) f(x) f(y) f(xy)j + '(x; y)for any x; y 2 R and > 0.
Additive function,Hosszu's functional equation,Hyers-Ulam stability
http://ijnaa.semnan.ac.ir/article_45.html
http://ijnaa.semnan.ac.ir/article_45_05a87c012c6971554afb7ebdaa886d7d.pdf
Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
Some inequalities involving lower bounds of operators on weighted sequence spaces by a matrix norm
45
54
EN
A. R.
Moazzen
Dept. of Math.,University of Sistan and Baluchestan , Zahedan, Iran.
R.
Lashkaripour
Dept. of Math.,University of Sistan and Baluchestan , Zahedan, Iran.
10.22075/ijnaa.2012.46
Let A = (an;k)n;k1 and B = (bn;k)n;k1 be two non-negative ma-trices. Denote by Lv;p;q;B(A), the supremum of those L, satisfying the followinginequality:k Ax kv;B(q) L k x kv;B(p);where x 0 and x 2 lp(v;B) and also v = (vn)1n=1 is an increasing, non-negativesequence of real numbers. In this paper, we obtain a Hardy-type formula forLv;p;q;B(H), where H is the Hausdor matrix and 0 < q p 1. Also for thecase p = 1, we obtain kAkw;B(1), and for the case p 1, we obtain Lw;B(p)(A).
Lower bound,Weighted block sequence space,Hausdor matrices,Euler matrices,Cesaro matrices,Matrix norm
http://ijnaa.semnan.ac.ir/article_46.html
http://ijnaa.semnan.ac.ir/article_46_a875762021951bf010efadf9db780be0.pdf
Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
An analog of Titchmarsh's theorem for the Dunkl transform in the space $mathrm{L}_{alpha}^{2}(mathbb{R})$
55
60
EN
R.
Daher
Department of Mathematics, Faculty of Science Ain Chick, University Hassan II, Casablanca, Morocco
M.
El Hamma
Department of Mathematics, Faculty of Science Ain Chick, University Hassan II, Casablanca, Morocco
10.22075/ijnaa.2012.48
In this paper, using a generalized Dunkl translation operator, we obtain an analog of Titchmarsh's Theorem for the Dunkl transform for functions satisfying the Lipschitz-Dunkl condition in $mathrm{L}_{2,alpha}=mathrm{L}_{alpha}^{2}(mathbb{R})=mathrm{L}^{2}(mathbb{R}, |x|^{2alpha+1}dx), alpha>frac{-1}{2}$.
Dunkl operator,Dunkl transform,generalized Dunkl translation
http://ijnaa.semnan.ac.ir/article_48.html
http://ijnaa.semnan.ac.ir/article_48_09ab190d1ec72a1adc2dde5fead7614b.pdf
Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
Application of He's homotopy perturbation
method for solving Sivashinsky equation
61
67
EN
M.
Ghasemi
Department of Applied Mathematics,
Faculty of Science, Shahrekord University, Shahrekord, P. O. Box
115, Iran.
A.
Davari
Department of Mathematics, University of Isfahan,
Isfahan, Iran.
M.
Fardi
Department of Mathematics, Islamic Azad University, Najafabad Branch, Najafabad, Iran.
10.22075/ijnaa.2012.49
In this paper, the solution of the evolutionaryfourth-order in space, Sivashinsky equation is obtained by meansof homotopy perturbation method (textbf{HPM}). The results revealthat the method is very effective, convenient and quite accurateto systems of nonlinear partial differential equations.
Homotopy perturbation method,Sivashinsky equation
http://ijnaa.semnan.ac.ir/article_49.html
http://ijnaa.semnan.ac.ir/article_49_b4b149fad220932afa0071fab8ba37a5.pdf
Semnan University
International Journal of Nonlinear Analysis and Applications
2008-6822
3
1
2012
01
01
Coupled systems of equations with entire and polynomial functions
68
73
EN
M.
Gil
Department of Mathematics,
Ben Gurion University of the Negev
10.22075/ijnaa.2012.50
We consider the coupled system$F(x,y)=G(x,y)=0$,where$$F(x, y)=bs 0 {m_1} A_k(y)x^{m_1-k}mbox{ and } G(x, y)=bs 0 {m_2} B_k(y)x^{m_2-k}$$with entire functions $A_k(y), B_k(y)$.We derive a priory estimates for the sums of the rootsof the considered system andfor the counting function of roots.
coupled systems,entire and polynomial functions,a priory estimates,resultant
http://ijnaa.semnan.ac.ir/article_50.html
http://ijnaa.semnan.ac.ir/article_50_7301f14535c96830f92b2d46fcdbf727.pdf