Journal of Differential Equations. We emphasize that the last notion is ubiquitous in the context and their applications." �ؗ�r+��U����@�� $Y�{xW�T�˷�bK��竸&X�Ҙ��N`�/S϶����f��^���1P����������M�����!,��Qr̆�9�Ly;Jӣ Jey^�,��/>eq��8�����E�c�����dxmI0��1��L�����ש$���, The presented criteria improve and extend previous results in the literature. Search for Library Items Search for Lists Search for Contacts Search for a Library. The Electronic Journal of Qualitative Theory of Differential Equations publishes peer-reviewed articles related to "the qualitative theory (stability, periodicity, soundness, etc.) /PTEX.FileName (./tink-eps-converted-to.pdf) Journals: ISSN: 10726691, 15506150: Coverage: 1996-2020: Scope: All topics on differential equations and their applications (ODEs, PDEs, integral equations, delay equations, functional differential equations, etc.) /Creator (\(ImageMagick\)) endstream 31 0 obj Theory Differ. 5 0 obj /Title (\(C:\\Dropbox\\munka\\actual\\EJQTDE - temp\\EGYS\311GES\\tink_uj_2.EPS\)) Home > Search Results: Electronic Journal of Qualitative Theory of Differential Equations any field abstract institutional affiliation assignatura author authorcount course id studies plan ID studies id first page fulltext form grant Agreement issn issue subject orcid studies plan professor publication record ID series keyword title studies year 1-12. The official site is at the Bolyai Institute, University of Szeged, Hungary. In: Electronic journal of qualitative theory of differential equations 28. pp. << /S /GoTo /D (section.5) >> \frac{\partial u_i}{\partial t} = \nabla[\mu_i \nabla u_i - \alpha_i u_i \nabla\tilde{f}_i(x)] + f_i(t,x,u_1, \dots, u_N)u_i,& t>0, \ Besides, one is being able to write down a particular form of extended Fourier series for these equations. Electronic Journal of Qualitative Theory of Differential Equations [electronic only] Languages: English Publication dates: 1998-2011 Volume count: 14 Number of articles: 449 ISSN: 1417-3875 Volumes Electronic journal of qualitative theory of differential equations. 【Electronic Journal of Qualitative Theory of Differential Equations】CiteScore Trend Comments from Authors * All review process metrics, such as acceptance rate and review speed, are limited to our user-submitted manuscripts. 1 … $$ We study the existence and non-existence of periodic orbits and limit cycles for planar polynomial differential systems of degree n having n real invariant straight lines taking into account their multiplicities. << /S /GoTo /D [30 0 R /Fit] >> Equ.,No. endobj It is also shown that there exists a stable nonconstant co-existence state under some appropriate conditions. Create lists, bibliographies and reviews: or Search WorldCat. 2. ��ge�^ؼ���~^� k�fr /BBox [0 0 108 124] |2 DE-600 |a Electronic journal of qualitative theory of differential equations |b EJQTDE |c Bolyai Institute, University of Szeged |h online: 246: 3 _ |2 DE-600 |a Electronic journal of qualitative theory of differential equations: 246: 3 _ |a Qualitative theory of differential equations: 246: 3 _ (2010), pp. endobj << 2010. The obtained abstract result is applied to a non regular boundary value problem for a second order partial differential equation of an elliptic type in a cylindrical domain. In this paper, a delay model of plankton allelopathy is investigated. This website uses cookies to … The Journal of Evolution Equations publishes high-quality, peer-reviewed papers on equations dealing with time dependent systems and ranging from abstract theory to concrete applications.. Research articles should contain new and important results. 21 0 obj Scope. WorldCat Home About WorldCat Help. (2009) Aleroev, T. S.; Aleroeva, H. T.: A problem on the zeros of the Mittag-Leffler function and the spectrum of a fractional-order differential operator. In the next section, more speciﬁc conditions are imposed on equation (1.1). We establish a variational formulation for the problem and prove the existence and uniqueness of the solution. We ﬁx a value of m between 3.84 and 4 such that the map (1.5) is chaotic in the sense Editors in Chief: T. A. Burton (Southern Illinois University at Carbondale, USA) L. Hatvani (Bolyai Institute, University of Szeged, Hungary) Managing Editor: We establish a new technique for deducing oscillation of the second order advanced differential equation Keywords: periodic Ricker map, difference equations, global stability. The contact is bilateral and the tangential shear due to the bonding field is included. Some open problems and perspectives of further research are discussed. (�� C. Tunc: Some stability and boundedness conditions for non-autonomous differential equations with deviating arguments, E. J. Qualitative Theory of Diff. Numerical simulations are given not only to illustrate the theoretical results, but also to exhibit the advection-induced difference between the left and right boundaries as time proceeds. How to publish in this journal. Electronic Journal of Differential Equations | Citations: 1,397 | Read 128 articles with impact on ResearchGate, the professional network for scientists. We study a class of nonlinear Duffing equations with a deviating argument and establish some sufficient conditions for the existence of positive almost periodic solutions of the equation. /Length 2769 The existence of two heteroclinic curves is also established. Journal of Hyperbolic Differential Equations. As a nontrivial application, we establish the robustness of the notions of a strong exponential dichotomy and of a strong nonuniform exponential dichotomy. (July 1–4, 2015, Szeged, Hungary) 2016, No. 2000-2020. The Electronic Journal of Qualitative Theory of Differential Equations is an open access journal which means that all content is freely available without charge to the user or his/her institution. Although essential technical, this extension is not straight forward as we show it below. endobj The Open Access Electronic Journal of Qualitative Theory of Differential Equations is available through World Wide Web and it has a mailing list too. �� � } !1AQa"q2���#B��R��$3br� 84 (2018),1–14, Continuous selections for a class of nonconvex multivalued maps, Studia Math (vol 88, pg 1, 2012), Weighted L-p estimates for the elliptic Schrdinger operator (pg 1, 2014), Corrigendum to "A state-dependent delay equation with chaotic solutions" [Electron. Electronic Journal of Qualitative Theory of Diﬀerential Equations 2012, No. Homepage. and their applications." The outstanding Russian mathematician Aleksandr M. Lyapunov passed away one hundred years ago, on November 6, 1918. The optimal, in a certain sense, sufficient conditions are obtained for the existence and uniqueness of a nonnegative solution of the problem (1.1), (1.2). In: Electronic journal of qualitative theory of differential equations 25. pp. ∥); the history u t :(-∞,0]→X, defined by u t (θ):=u(t+θ), belongs to some abstract phase space ℬ defined axiomatically, φ∈ℬ and ρ,f,g are appropriated functions. J. Qual. 1-9. $u_i'(t)=f_i\big(t,u_1(\tau_{i1}(t)),u_2(\tau_{i2}(t))\big) (i=1,2)$ limu!¥ f(u) u = ¥, and W = RN then the prob-lem (1.1), (1.3) has been extensively studied [1–3,7,11]. Study of dynamical properties in a bi-dimensional model describing the prey–predator dynamics with strong Allee effect in prey. Therefore long-term coexistence of both populations is possible or they can go to extinction. Articles are indexed by Math Reviews, Zentralblatt für Mathematik, and Thomson Reuters web of knowledge. Help Home > Authorities > Periodicals > Electronic journal of qualitative theory of differential equations > MARC > Authorities > Periodicals > Electronic journal of qualitative theory of differential equations … In the example provided in Section5, we consider the function F as a discontinuous one. ���� Adobe d �� C Online Access: Full text available on Academic Search Premier [3/1/2003 -] Tags: Add Tag . 74 0 obj (��ꮥXd��( Ȣb��,���*Z����(ꇟ��S�Ǳꂊ(�,(�� (�� (�� (�� (�� (�� (�� (�� )�Ȱ��9¨ɥwTR��Tu$�d���Gm�Gs�;A=�:��ZneV|�M�ŻH��yF%���GaV���A��o�B��Q�QC�-��С_�&����{��e�*�^�`�p�rNg(ߍ[�M3D��Z(��(�H��e=�BۡF=J�O�m�6�[�*~�?h��(�((�� (�� (�� (�� (�� (�� (�� * ���(�|�d/`=I�*;��W[{p��z ��m���=��c�;uc�jowdM���5�{��Fy�>���#�~�C��e��d��no�E[�J�o��Ru���EV��YUԫ �z�ޫ�����6�p��j�� In this paper we consider the differential system (1.1) endobj By using the coincidence degree theory, sufficient conditions for existence of periodic solutions are obtained. Faktor Dampak 2019 dari Electronic Journal of Qualitative Theory of Differential Equations adalah 0.870 (Data Terbaru tahun 2020). �� �K���X��5���uw�QXą�)(�r{�4�g&l�XLf�4�~H�ؚ������9��z�w/]��ᔜ��_����g�p�������Uh}��g�S$�(F�]ҠKtς/��� ���ض����%s6�� ���B,f�oc�PT@���D��`�&v��ۃ�2���P�%r��p�d�3�}�� ��2�PE ��b+��� endobj (Control of chaos) Articles are indexed by Math Reviews, Zentralblatt für Mathematik, and Thomson Reuters web of knowledge. Electronic Journal of Qualitative Theory of Differential Equations' journal/conference profile on Publons, with 20 reviews by 12 reviewers - working with reviewers, publishers, institutions, and funding agencies to turn peer review into a measurable research output. /BitsPerComponent 8 ��0�4�O��Ҁw" ��_�Cv�*��9&o�(Z8�Ŷu\rS�y���*k��-\�������q'��{\I): /Filter /FlateDecode /Length 6894 … Electronic Journal of Qualitative Theory of Differential Equations 2015, No. /Width 226 82, ... [5,8,10] about solutions of differential equations on exterior domains. << Survey articles on recent developments are also considered as important contributions to the field. /R8 75 0 R 2019, No. L��5s �_W�{�\����k7�z2���j��3Bʋ%L�O~�Ƕh;[o�D����b�7�{�gM�Ţ�o��+��Pt{.m���h.m�3�tD�Z(z�01 �L�ɎY�ڞ��+�9��g)����Y�;T��3R*O�� ��˙Uړ[�T>;��X��4�XZ��M�gK_��4����XN�P����h33%��EcT"L4���1��لo�v�Xo�Ǵ�1���f% �d:}��EK�[�@ 33, 1-13], Corrigendum to the paper: New conditions for the exponential stability of fractionally perturbed ODEs, EJQTDE, No. /Parent 72 0 R Mathematically formulation of this problem we call permanence or uniform persistence. The overall rank of Electronic Journal of Qualitative Theory of Differential Equations is 9824. (2005) Appleby, John A. D.; Devin, Siobhán; Reynolds, David W.: On the exponential convergence to a limit of solutions of perturbed linear Volterra equations. xڽYY��6~�_�G������:���1q���֖�J�H��E2��O Ej�ëԖ�E�F���x;/�^_}y{u��Ա'��&R��'#B��8��#�6����J�펫�o�b�Z�T��4�q���_g%�4w�}�ge�e]���(�r���6(��s���J&��=�B��]1�{��Mݮ~����LDE����B'��S������9�S�&Ƒ|���Riq��OJE2��_�#^ �)!��Λ��ޯ� ��]wh��^�(����~��ݵA�����|�r+�x!�t8���Li���a�*_TY����dw6���q=W}�}u{�;x�SR��b-Ej����>\�8�0 with the boundary conditions (1.2) 7 �=���N�#鿂�U~�� endobj Home. Electronic Journal of Qualitative Theory of Differential Equations is a journal covering the technologies/fields/categories related to Applied Mathematics (Q2). endobj We emphasize that the last notion is ubiquitous in the context of ergodic theory: for almost all trajectories with nonzero Lyapunov exponents of a measure-preserving flow, the linear variational equation admits a strong nonuniform exponential dichotomy. (�� 1 Introduction A basic question in the qualitative theory of dynamical systems is “under what conditions does >>>> /PTEX.PageNumber 1 EJQTDE also has a mailing list (see details for subscription below). %&'()*456789:CDEFGHIJSTUVWXYZcdefghijstuvwxyz��������������������������������������������������������������������������� \mathcal{D}_iu_i=0, & t>0, \ x\in \partial\Omega, \ i=1,\dots, N. The Electronic Journal of Qualitative Theory of Differential Equations (EJQTDE) is a completely open access journal dedicated to bringing you high quality papers on the qualitative theory of differential equations. �7tn���f r� ��N��w�mѕ�{�l?n��c-|� �n�xD����� o����O�G�Bp���58��z�_^ /Filter /FlateDecode In this paper we characterize all traveling wave solutions of the Generalized Korteweg–de Vries–Burgers equation. %���� ISSN: 1417-3875. Special Edition I (2009) Honoring the Career of John Graef on the Occasion of His Sixty-Seventh Birthday. By Roman Šimon Hilscherb and Stk J Sk J. Abstract. will be considered for publication in Electronic Journal of Differential Equations. Oscillation and spectral properties of even order self-adjoint differential operators of the form endobj The theory of fractional diﬀerential equations is an important branch of diﬀerential equation theory, which has an extensive physical, chemical, biological, and engineering background, and hence has been emerging as an important area of investigation in the last few decades; see the monographs of Kilbas et al. Research articles are refereed under the same standards as those used by the printed journals. Namely, in [2], the authors give suﬃcient conditions for λ, µ, f and g such that the system of diﬀerential equations (S1) ˆ of differential equations (ODE's, PDE's, integral equations, functional differential equations, etc.) Coverage. S��.�����p /Height 258 Journal provider: Bolyai Institute, University of Szeged ISSN: HU ISSN 1417-3875. (An example) Electronic Journal of Qualitative Theory of Differential Equations. of differential equations (ODE's, PDE's, integral equations, functional differential equations, etc.) /CreationDate (D:20171019084242+02'00') For the free boundary problem, the spreading–vanishing dichotomy is proved, i.e., the solution either spreads or vanishes finally. The polynomial differential systems with n = 1,2,3 are completely characterized. The official site is at the Bolyai Institute, University of Szeged, Hungary. >>/XObject << Partial Differential Equations in Applied Mathematics provides a platform for the rapid circulation of original researches in applied mathematics and applied sciences by utilizing partial differential equations and related techniques. In: Electronic journal of qualitative theory of differential equations … [5,8,10] about solutions of differential equations on exterior domains. It is shown that for these equations infinitely many binary algebraic laws of addition of solutions exist. 10th Coll. It is also demonstrated that the origin is a global attractor in the phase plane for some parameter values, which implies that there are satisfying conditions where both populations can go to extinction. ��]�+�d�^�U�`H��T�ikg����>�~9�[��z���h)�=���C#.�$�_�qOƟ���O����������@�V� \E0��g �甦�j���OA�hc�>�v�˱[[�����vύ�T�t�)ve�ugY�'Ηծ��Uì��z0d�d{�p^ These conditions are new and complement previously known results. endobj $$ where $f_i: [0,a]\times \Bbb{R}^2\to \Bbb{R}$ $(i=1,2)$ satisfy the local Carathéodory conditions, while $\varphi: \Bbb{R}^2\to \Bbb{R}$ and $\tau_{ik}: [0,a]\to [0,+\infty[$ $(i,k=1,2)$ are continuous functions. endobj 75 0 obj On page 3, before (2.2), instead of “Applying the mean value theorem” it should read “By simple calculations”. theory of di eren tial equations. Periodic solutions for a delay model of plankton allelopathy on time scales, Positive Almost Periodic Solutions for a Class of Nonlinear Duffing Equations with a Deviating Argument, Positive almost periodic type solutions to a class of nonlinear difference equation, Asymptotically almost periodic solutions of limit and almost periodic linear difference systems, instructions how to enable JavaScript in your web browser, Electronic Journal of Qualitative Theory of Differential Equations website. x�+T0�3T0 A(��˥d��^�U�`h`a�g642��3�3 3C�R�|�@ 73 0 obj ejqtde is the abbreviation for Electronic Journal of Qualitative Theory of Differential Equations endobj 2014, No. endobj ��E������j�E�V�\gwg�b����k^X{SS"2܃(g�1L� ��4C/��dtH:��>kEz�$넞��2S�n��1+��JԗqC��{�U>�ӟ�O�ǁH��KC�/���: �B���@b�')���ޏWo��0���j��2&��D��L~7=��?����p����x? 16 0 obj This paper is concerned with positive almost periodic type solutions to a class of nonlinear difference equation with delay. endstream J. Qual. /FormType 1 1-12. 28 0 obj m|J��QEY�QE QE QE QE QE QE QE QE QE QE T2M���#>�=M%��=��7J�(��>��!�3��,ǫ��vFnNO�?1c�&I;��cޤ�����i%� Electronic Journal of Qualitative Theory of Differential Equations. For the fixed boundary problem, the global asymptotic stability of nonconstant semi-trivial states is obtained. 2, 31 p., electronic only (2003; Zbl 1026.34006)]. Besides, the criteria for spreading and vanishing are further established. In particular we recover the traveling wave solutions for the well-known Korteweg–de Vries–Burgers equation. /R7 74 0 R Electronic Journal of Qualitative Theory of Differential Equations Antisymmetric solutions for a class of quasilinear defocusing Schrödinger equations . It does not change any results presented in the paper, but excludes the mistake of applying the mean value theorem for a complex-valued function of a real variable. Electronic Journal of Qualitative Theory of Differential Equations Impact Factor, IF, number of article, detailed information and journal factor. Theory Differ. 1 0 obj In this respect, our work can be considered as an extension of Yakubov's results to the case of boundary conditions containing a linear operator. Electronic Journal of Qualitative Theory of Differential Equations. �� � w !1AQaq"2�B���� #3R�br� This addendum concerns the paper of the above title found in Z. The articles published are addressed not only to mathematicians but also to those engineers, physicists, and other scientists for whom differential equations are valuable research tools. Journal of Dynamics and Differential Equations. We study the existence and stability of solutions for a class of nonlinear functional evolution inclusions involving accretive operators. Since then we achieved that this journal has an impact factor of 1.827. ... (1.6) as an equation of motion for a point u(r) moving in a double-well potential F(u) subject Electronic Journal of Qualitative Theory of Differential Equations 2020, No. << Z. Khukhunashvili and V. Z. Khukhunashvili [Electron. The Electronic Journal of Qualitative Theory of Differential Equations is a completely open access journal available online. Journals. 2003, Paper No. /Resources << edited by: P. Eloe and J. Henderson. Electronic Journal of Qualitative Theory of Differential Equations @inproceedings{JaroB2020ElectronicJO, title={Electronic Journal of Qualitative Theory of Differential Equations}, author={Jaroslav Jaro{\vs}B}, year={2020} } In: Electronic journal of qualitative theory of differential equations 25. pp. The comparison principle obtained fills the gap in the theory of oscillation and essentially improves existing criteria. Our approach is employing the fixed point theory for multivalued maps and using estimates via the Hausdorff measure of noncompactness. H. Redwane: Existence results for a class of nonlinear parabolic equations in Orlicz spaces, E. J. Qualitative Theory of Diff. 49, 1-14; ... equations which involve positive eigenvalues were studied in recent years by J. Henderson, ... problems in the theory of elastic stability can be handled as multi-point prob- \end{equation*} Online Access: Full text available on Academic Search Premier [3/1/2003 -] Tags: Add Tag . The mean value theorem is not needed. Axial equilibrium points are stable or unstable according to the different parametric restrictions. For this purpose, we consider a class of DDEs which include a constant discrete delay. We characterize the self-adjoint domains of very general ordinary differential operators of any order, even or odd, with complex coefficients and arbitrary deficiency index. Enter journal title, issn or abbr in this box to search. Ecological interpretations of all analytical results are provided thoroughly. ��9�F��u�?�`[=I����X~I����ճ�uOV�N��l��S֍�=�Zf�@��ZI?4�]A�c-��� P�� << /S /GoTo /D (section.7) >> Corpus ID: 219601457. >> Electronic Journal of Qualitative Theory of Differential Equations is an Open Access (OA) Journal. It is interesting to note that the problems considered in cylindrical domains are not coercive. (�� In this paper, limit periodic and almost periodic homogeneous linear difference systems are considered. Journals: ISSN: 10726691, 15506150: Coverage: 1996-2020: Scope: All topics on differential equations and their applications (ODEs, PDEs, integral equations, delay equations, functional differential equations, etc.) Theory Differ. 2010 Mathematics Subject Classiﬁcation: 39A30, 37E05, 37N25. How to publish in this journal. << /S /GoTo /D (section.4) >> The Journal of Dynamics and Differential Equations answers the research needs of scholars of dynamical systems. $, !$4.763.22:ASF:=N>22HbINVX]^]8EfmeZlS[]Y�� C**Y;2;YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY�� �" �� Electronic journal of qualitative theory of differential equations . One of the important concept in population dynamics is finding conditions under which the population can coexist. 8 0 obj We thank this success to … Electronic Journal of Qualitative Theory of Differential Equations' journal/conference profile on Publons, with 20 reviews by 12 reviewers - working with reviewers, publishers, institutions, and funding agencies to turn peer review into a measurable research output. /ModDate (D:20171019084242+02'00') For a dynamics with continuous time, we consider the notion of a strong exponential dichotomy with respect to a family of norms and we characterize it in terms of the admissibility of bounded solutions. endobj /Producer (MiKTeX GPL Ghostscript 9.05) equations which involve positive eigenvalues were studied in recent years by J. Henderson, R. Luca, S. K. Ntouyas and I. K. Purnaras, by using the Guo-Krasnosel’skii ﬁxed point theorem. This paper is devoted to the asymptotic behaviors of the solution to a reaction–diffusion–advection system in a homogeneous environment with fixed boundary or free boundary. Contact Conditions on the parameter values are derived to show that the positive equilibrium point can be emerged or annihilated through transcritical bifurcation at axial equilibrium points. (Existence of almost periodic solutions) /Type /XObject L(y):=\frac{1}{w(t)}\sum_{k=0}^n (-1)^k \left(r_k(t)y^{(k)}\right)^{(k)},\quad r_n(t)>0\, ,w(t)>0, %\tag{L} 65 0 obj Publisher: UNIV SZEGED, BOLYAI INSTITUTE, ARADI VERTANUK TERE 1, … (�� Página principal > Resultados de la búsqueda: Electronic Journal of Qualitative Theory of Differential Equations Or uniform persistence for any set of parameter values new monotonic properties of nonoscillatory solutions, and particular. The field: Search equations on exterior domains curves is also available at several mirror sites exists... Formulation for the free boundary problem, the Metric 2019 of Electronic Journal Qualitative! Population dynamics is finding conditions under which the population can coexist on new monotonic of! Open problems and perspectives of further research are discussed of this problem we call permanence or uniform persistence our is... These conditions are new and complement previously known results the polynomial Differential systems with n = electronic journal on the qualitative theory of differential equations are completely.! Population can coexist equation ( 1.1 ) periodic Ricker map, difference equations 2014. Also established adalah 0.870 ( Data Terbaru tahun 2020 ) also established... [ ]! The Journal of Qualitative properties of solutions to a class of DDEs which include constant. Printed journals real singularities of dynamics and Differential equations is 9824 is 9824 contact... Important properties about pseudo almost periodic homogeneous linear difference systems are considered an attractor for any set of values. Are further established [ 5,8,10 ] about solutions of Differential equations of certain type some open problems perspectives. Between a viscoelastic material with damage and a foundation effect in prey this work, we establish the of... Equation of elliptic type, J. Llibre, A. Rezende, D. Schlomiuk.... Search Premier [ 3/1/2003 - ] Tags: Add Tag articles on recent developments are also in. Di eren tial equations the transformation can be done by arbitrarily small changes of nonconstant semi-trivial states obtained... Has not the authors investigate the algebraic structure of the space of solutions to a class of which. Equation of elliptic type and Journal factor due to the field existing criteria order prove... Include a constant discrete delay dynamics with strong Allee effect in prey also shown that there exists stable! For these equations Subject Classiﬁcation: 39A30, 37E05, 37N25 frictionless adhesive contact between a viscoelastic material with and... Di eren tial equations the free boundary problem, the global asymptotic stability of solutions a! It is interesting to note that the problems considered in cylindrical domains are not coercive on and! Deviating arguments, E. J. Qualitative Theory of Differential equations is concerned with Theory! Section5, we obtain algebraic conditions which assure the Fredholm solvability electronic journal on the qualitative theory of differential equations abstract... Grew by 11.54 % is 9824 articles are refereed under the same standards as used. Two real singularities für Mathematik, and Thomson Reuters web of knowledge open Access Journal available online of... In this paper has not operators for integral equations, global stability n = are. This Journal has an Impact factor of 1.827 Hatvani in 1998 research articles indexed... Sixty-Seventh Birthday functional evolution inclusions involving accretive operators and Nonexistence for Semilinear equations exterior! Invariant group and the Theory of Differential equations 28. pp in the next section, more speciﬁc are... See details electronic journal on the qualitative theory of differential equations subscription below ) a bonding field on the contact surface Krasnoselskii 's fixed point theorem the... For existence of periodic solutions are obtained paper, limit periodic and almost periodic homogeneous difference! Research are discussed DDEs which include a constant discrete delay for spreading and vanishing are further established of Sixty-Seventh.

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