Ph. D. Samir  H. Saker

(Associate Prof. of Mathematics)

Number 3 in the data base of Mansoura University’s publication (160 papers and two books)

Persona Details Date of Birth:  11-1-1971. Place: Egypt. Status: Married (three girls). Permanent Address: Department of Mathematics, Mansoura University, Egypt http://www.mans.edu.eg/pcvs/30040/ shsaker@mans.edu.eg shsaker2003@yahoo.com, Home Tel. in Egypt +20502292022  Current Address. King Saud University, Supervisor of Mathematics Program of the preparatory year and founder of Math. Skills department. (This is my web site in KSU) http://faculty.ksu.edu.sa/73607/Pages/Home%20Page.aspx Mobile in Saudi Arabia +966 0566378763 Educations B. Sc. (May-1993) in Mathematics, Rank First, Very Good with honor degree, Mansoura University,  Egypt. M. Sc. (November-1997) in Mathematics (Differential Equations), Mansoura University, Egypt. Title: Oscillation of Solutions of Delay Differential Equations Ph. D. (December 2002) in Mathematics, Adam Mickiewicz University, Poznan, Poland. Title: Oscillation Theory of Delay Differential and Difference Equations and Some of Their Applications. Fields of Interest. Ordinary and functional differential equations (delay and neutral delay equations), Difference equations, Partial differential and difference equations, Nonlinear dynamical systems, Mathematical models in Biology, Ecology, Economy, Epidemiology, and Medicine, etc.  Dynamic equations on time scales. Number Theory. Boundary value problems. Q-Calculus. Zeros of Riemann Zeta Function. Scholarships and Grants ý  IKY Postdoctoral Scholarship, Department of Mathematics, University of Ioannina, Greece (March2004-August 2004). ý   Fulbright Postdoctoral Scholarship, Department of Mathematics, Trinity University, San Antonio, Texas, USA (March 2005-August 2005). ý  Postdoctoral-Fellowship, University of Calgary, Department of Mathematics, Canada, (February 2006-Janury 2007). Awards v  El-Dakahlia State Award and Honoring Certificate (1993). v  Honoring Certificate from Scientists Syndicate,  Mansoura (1994), v  Honoring Certificate from Scientists  Syndicate,  Cairo (1994), v  Shoman Award for Young Arab Scientists, Mathematical Science, (2003). v  Fulbright Award (2004). v  2005 National State Prize on Basic Science (Mathematical Science), Egyptian Academy of Scientific Research and Technology. v  I was selected for inclusion in national who’s Who (Marquis in Science and Engineering) Edition published in November 2005. v  State Incentive Award in Mathematics (Jan 2006). v  King Saud University Nomination on TWAS award (Italy 2007).  Academic Appointments Associate  Prof. of Mathematics, Department of Mathematics Skills, PY, King Saud University from 11/7/2008 till Now. Associate Prof. of Mathematics, Department of Mathematics, Faculty of Science, Mansoura University from 31/8/2008 till Now. Lecturer of Mathematics, Department of Mathematics, Faculty of Science, Mansoura University from 20/7/2003 till Now. Assistant Lecturer of Mathematics, Department of Mathematics, Faculty of Science, Mansoura University from 17/1/98 to 19/7/2003. Demonstrator of Mathematics, Department of Mathematics, Faculty of Science, Mansoura University from 17/12/1994 to 16/1/1998.  Acadimic Activites v  Member of American Mathematical Society, http://www.ams.org, v  Member of European Mathematical Society, http://www.emis.de v  Member of Egyptian Mathematical Society, http://msrc.etms-web.org v  Member of European Complex Systems Society http://www.open.ac.uk/ecss/index.html v  Member of Ibn Al-Haitham Center (Amman Jordan),  http:// ww.ibnalhaitham.org, v  Member of International Society of Difference Equations, http://web.umr.edu/~isde/ v  Member of African Mathematical Union, AMU, o    http://www.math.buffalo.edu/mad/PEEPS2/sakir_samir.html v  Reviewer of Zentralblatt MATH.  (European Math. Soc., No. 10325), http://www.emis.de v  Reviewer of Mathematical Review (Amer. Math. Soc., No. 37334) http://www.ams.org Supervision   Ph. D. Thesis advisor (finished), Taher S. Hassan, Oscillation of some functional differential equations (2006).  Editorial I am on Editorial Boards of ·         Journal of Mathematics and Statistics,      http://www.ansijournals.com/jms2 ·         International Journal of Applied Mathematics & Statistics (IJAMAS), http://www.geocities.com/ceser_info/eb-ijams.html . ·         Journal of Contemporary Mathematics. ·         African Diaspora Journal of Mathematics,  http://www.arican-j-math.org ·         Journal of Applied Sciences ·         http://ansijournals.com/3/c4p.php?id=1&theme=3&jid=jas ·         International Journal of Differential equations,  Hindawi publisher.  ·         Referring to: o    Journal of London Mathematical Society, o    Journal of Mathematical Analysis and Applications, o    Journal of Difference equations and Applications, o    Nonlinear Analysis TMA, o    Nonlinear Analysis RWA, o    Journal of Comp. and Applied Mathematics, o    ANZIAM Journal, o    Fasculi Mathematice, o    E. Journal of Qualitative Theory Differential Equations, o    Bull Korean Mathematical Society,   o    E-Notes of Applied Mathematics, o    Indian Journal of Pure and Applied Mathematics, o    Advances in Difference equations, o    European Mathematical Journal, o    J. Applied Mathematics and Computing, o    Journal of Applied Analysis, o    African Diaspora Journal of Mathematics, o    Applied Mathematics Letters, o    Mathematical and Computer Modeling, o    Computer & Mathematics with Applications. o    Physics Letters A, o    Ecological Systems, o    Dynamic Systems and Applications, o    Communication in Dynamical Systems, etc. o    Sarajevo Journal of Math., o     Advances of Dynamic Syst. Appl., o    International  J. Difference Eqns. Appl., o    International journal of Biomathematics, o    Abstract and Applied analysis, o    Hiroshima Journal of Mathematics o    Science in China, Series A-Mathematics,   Conferences and Schools ·         International school of history of Mathematics, Mansoura 1999 ·          Mathematics and the 21st Century, Cairo - Egypt 15-20 January 2000. ·         International Conference of Topological Methods in Nonlinear Analysis, the Mathematical Conference Center, Badlevo, Poland, 18-23 June, 2001. ·         Czechoslovak International Conference on Differential Equations and Their Applications,  EQUADIFF 10, Prague, Czech Republic, August 27- 31, 2001. ·         School on Population Dynamics, the Mathematical Conference Center, Badlevo, Poland June 17-21, 2002. ·         Conference on Mathematical Modeling of population Dynamics, the Mathematical Conference Center, Badlevo, Poland, June 24-28, 2002. ·         Workshop on Periodicities in Difference Equations, University of Ioannina, Greece, June 5, 2004. ·         Texas Dynamics Systems Workshop, Trinity University, San Antonio, USA, April 8-9, 2005. ·         International Conference on mathematical Analysis and its Applications, Assiut-Egypt, 3-6 January 2006. ·         Canadian Mathematical Society Summer 2006 Meeting, University of Calgary, Calgary, Alberta, Canada, June 3-5, 2006. ·         Workshop of computation and Modeling: Methods and Applications, King Abdul Aziz City for Science and Technology, Riyadh, January 23, 2007. ·         Third Saudi Science Conference (New Horizons in Science and their Applications) College of Science - King Saud University 10-13th March 2007 (20-23/1428 H). ·         Workshop of Partial differential equations in modern mathematical physics and applied mathematics, King Abdul Aziz City for Science and Technology, Riyadh, February 13, 2007. ·         Workshop titled: "Developing Science & Mathematics Education: Vision & International Partnership". The workshop will be held on Tuseday & Wendesday 29-30/12/1428H, 8-9/1/2008. ·         The third international conference on Mathematical Sciences-ICM 2008, March 3-6 (2008). ·         First International Conference for E-Learning and Distance Learning, Riyadh 1430-2009. ·         Progress of Difference equations 2009, Badlevo, Poland, May 24-29, 2009.  ·          Summary of Studies v Qualitative theory of differential and partial differential equations, v Qualitative theory of difference and partial difference equations, v Periodicity of non-autonomous delay difference equations and applications, v  Dynamics of nonlinear delay continuous and discrete mathematical models in Biology, Ecology, Medicines, Economics, etc. (oscillation, boundedness, permanence, periodicity, persistence, stability, global attractivity). v   Oscillation and periodicity theory of dynamic equations, delay dynamic equations and neutral delay dynamic equations on time scales. v Oscillation theory of q-differential-difference equation, v Discrete Population Models.  Scientific Publications Books: The following two books are compiled by me from Mc Graw Hill to the preparatory year in king Saud university  (With a very good experience on Mathzone) Precalculus: Authors: Raymond A. Barnett, Michael R.  Ziegler and Karl E. Byleen. The book is compiled by the instructor Dr. Samir H Saker (Math. Skills Dept., PY, KSU) Year: 2008 Book: Calculus, early transcendental functions (A Custom publication to KSU, Third Edition)        Year: 2008 Authors:  Robert T. Smith, and Roland R. Minton The book is compiled by the instructor Dr. Samir H Saker (Math. Skills Dept., PY, KSU) . Website: http://www.mhhe.com/math/calc/smithminton (The first book on the web site)

Books for Grad Stusies  Samir Saker, Oscillation Theory of Delay Differential and Difference Equations: Second and Third Orders, 660 pages, Verlag dr Muler, Germany (2010).   http://www.amazon.com/Oscillation-Theory-Differential-Difference-Equations/dp/3639238699/ref=sr_1_fkmr0_1?ie=UTF8&qid=1274264728&sr=1-1-fkmr0

Samir. H. Saker, Oscillation Theory of Dynamic equations on time scales.  (published 2010). http://www.amazon.com/Oscillation-Theory-Dynamic-Equations-Scales/dp/3838360281/ref=sr_1_2?ie=UTF8&s=books&qid=1286600496&sr=1-2

Some papers selected on Top 25 on Sciencedirect (hotest articles).  [1] R. P. Agarwal, D. O'Regan and S. H. Saker, Oscillation criteria for second-order nonlinear neutral delay dynamic equations, Journal of Mathematical Analysis and Applications, 300, Issue 1, 1 December 2004, 203-217. (October-December 2004). [2] S. H. Saker, Oscillation of second-order nonlinear neutral delay dynamic equations on time scales, Journal of Computational and Applied Mathematics, Volume 187, Issue 2, 1 March 2006, 123-141. (January-March 2006). [3] L. Erbe, A. Peterson and S. H. Saker, Oscillation criteria for second-order nonlinear delay dynamic equations, J. Math. Anal. Appl. J. Math. Anal. Appl. 333 (2007), 505-522 (April-June 2007). [4] S. H. Saker and J. Alzabut, Existence of periodic solutions, global attractivity and oscillation of impulsive delay population model, Nonlinear Analysis, Real world Phenomena Volume 8, Issue 4, September 2007, Pages 1029-1039. [5] E. Braverman, and S. H. Saker, Permanence, Oscillation and Attractivity of the Discrete Hematopoiesis Model with Variable Coefficients, Nonlinear Anal. Ther. Meth. Appl. 67 (2007), 2955-2965. (October-December 2007).  [6] A paper chooses in the Most 50-frequently read articles during May and September 2007,   E. M. Elabbasy and S. H. Saker, Periodic solutions and oscillation of discrete nonlinear delay population dynamics model with external force,  IMA J. Appl. Math. (2005), 1-15. [7] E. Braverman, and S. H. Saker , On the Cushing–Henson conjecture, delay difference  equations and attenuate cycles,  J. Diff. Eqns. Appl 14 (2008), 275-286, ( A Solution of an  important conjecture in mathematical Biology,  [8] S. H. Saker, Stability and Hopf bifurcations of nonlinear delay malaria epidemic model, Nonlinear Anal. RWA. 11 (2010), 784-799. Publications (170-) v  Differential Equations [1] E. M. Elabbasy and S. H. Saker, Oscillation of nonlinear delay differential equations with several positive and negative coefficients, Kyungpook Mathematical Journal, Vol. 39 (1999), 366-376. [2] E. M. Elabbasy, S. H. Saker and K. Saif, Oscillation of nonlinear delay differential equations with application to models exhibiting the Allee effect, Far East Journal of Mathematical Sciences 1, no. 4 (1999), 603-620. [3] E. M. Elabbasy, A. S. Hegazi and S. H. Saker, Oscillation of solutions to delay differential equations with positive and negative coefficients, Electronic Journal of Differential Equations 2000, No. 13 (2000), 1-13. [4] Ravi P. Agarwal and S. H. Saker, Oscillation of solutions to neutral delay differential equations with positive and negative coefficients, International Journal of Differential Equations and Applications 2 (2001), 449-465. [5] S. H. Saker and E. M. Elabbasy, Oscillation of first order neutral delay differential equations, Kyungpook Mathematical Journal 41 (2001), 311-321. [6] W. T. Li and S. H. Saker, Oscillation of nonlinear neutral delay differential equations and applications, Annales Polinici Mathematici 77 (2001), no. 1, 39-51. [7] S. H. Saker, Oscillation of higher order neutral delay differential equations with variable coefficients, Dynamic Systems & Application 11 (2002),  107-125. [8] I. Kubiaczk and S. H. Saker, New oscillation criteria of first order delay differential equations, Demonstr. Math. 35, no.2 (2002), 313-324. [9] W. T. Li and S. H. Saker, Oscillation of solutions to impulsive delay differential equations, Commentationes Mathematicae XLII (2002), 63-74. [10] I. Kubiaczyk, S. H. Saker, Oscillation of solution of neutral delay differential equations, Math. Slovaca 52 (2002), no. 3, 343-359. [11] S. H. Saker and I. Kubiaczyk, Oscillation of nonlinear neutral delay differential equations, J. Appl. Analysis 8 (2002), no.2, 261-278. [12] S. H. Saker, Oscillation of second order neutral delay differential equations of Emden-Fowler type, Acta Math. Hungarica 100, no.1-2  (2003), 7-32. [13] E. M. Elabbasy and S. H. Saker, Oscillation of delay differential equations with several positive and negative coefficients, Disc. Math. Differential Inclusion, 23 (2003) 39-52. [14] S. H. Saker, P.Y.H. Pang and Ravi P Agarwal, Oscillation theorems for second order nonlinear functional differential equations with damping, Dynamic Sys. Appl. 12 (2003), 307-322. [15] I. Kubiaczyk and S. H. Saker and J. Morhalo, New oscillation criteria for nonlinear neutral delay differential equations, Appl. Math. Comp. 142 (2-3)(2003), 225-242. [16] S. H. Saker, Oscillation of solutions of a pair of coupled nonlinear delay differential equations, Portugalae Mathematica 60 (2003), 319-336. [17] I. Kubiaczyk, W. T. Li and S. H. Saker, Oscillation of higher order delay differential equations with applications to hyperbolic equations, Indian J. Pure & Appl. Math. 34 (2003), 1259-1271. [18] I. Kubiaczyk and S. H. Saker, Oscillation theorems of second order nonlinear neutral delay differential equations, Disc. Math. Diff. Incl. Cont. Optim. 22 (2002), 185-212. [19] S. H. Saker and J. V. Manojlovic, Oscillation criteria for second order Superlinear neutral delay differential equations,  EJQTDE. 10 (2004), 1-22. [20] E. M. Elabbasy, T. S. Hassan, S. H. Saker, Oscillation of second-order nonlinear differential equations with a damping term, EJDE Vol. 2005 (2005), No. 76, pp. 1-13. [21] E. M. Elabbasy, T. S. Hassan, S. H. Saker, Oscillation criteria for first-order nonlinear neutral delay differential equations, EJDE Vol. 2005 (2005), No. 134, pp. 1-18. [22] E. M. Elabbasy, T. S. Hassan, S. H. Saker, Necessary and sufficient conditions for oscillation of neutral differential equation, Serdica Math. J. 31 (2005), 1001-1012. [23] Y. G. Sun and S. H. Saker, Forced Oscillation of higher order nonlinear differential equations, Appl. Math. Comp. 173 (2006), 1219-1226. [24] S. H. Saker, Oscillation criteria of third-order nonlinear delay differential equations, Math. Slovaca 56 (4) (2006), 433-450. [25] E. M. Elabbasy, T. S. Hassan, S. H. Saker, Oscillation and nonoscillation of nonlinear neutral delay differential equations with several positive and negative coefficients,  Kyungpook Mathematical Journal J. 47(2007), 1-20. [26] E. M. Elabbasy, T. S. Hassan, S. H. Saker, New oscillation Criteria for first order nonlinear neutral delay differential equations, J. Appl. Math. Comp. (accepted). [27] M. Bohner and S. H. Saker, Oscillation of damped second order nonlinear delay  differential equations of Emden-Fowler type, Advances in Dynamical Systems and Applications 1, No.2 (2006), 43-61. [28] B. Bacuĺıkov́ a, E. M. Elabbasy, S. H. Saker, J. Ďzurina, Oscillation Criteria for Third-Order Nonlinear Differential Equations, Math. Slovaka 58 (2008), 201-220. [29] S. H. Saker, Oscillation criteria of Hille and Nehari types for third-order delay differential equations, Comm. Appl. Anal. 11 (2007), 451-468. [30] S. H. Saker, J. Garef, Oscillation Theory of Third-Order Nonlinear Functional Differential Equations,  (preprint) [31] S. H. Saker and J. Džurina,  On the Oscillation of Certain Class of Third-Order Nonlinear Delay Differential Equations ,  Math. Bohemica (accepted). v  Partial Differential Equations [1] I. Kubiaczyk, S. H. Saker, Oscillation of parabolic delay differential equations, Demonst. Math. 35, no.4 (2002), 781-792. [2] I. Kubiaczyk and S. H. Saker, Oscillation of delay parabolic differential equations with several coefficients, J. Comp. Appl. Math. 147 (2002), no. 2, 263-275. [3] I. Kubiaczyk and S. H. Saker, Oscillation of parabolic delay differential equations with positive and negative coefficients, Commentationes Mathematicae XLII (2002), 221-236. [4] S. H. Saker, Oscillation of hyperbolic nonlinear differential equations with deviating arguments, Publ. Math. Debr. 62 (2003), 165-185. v  Difference Equations     [1] S. H. Saker, Oscillation of nonlinear neutral difference equations, Inter. J. Pure Appl. Math.  vol. 1, no. 4 (2002), 459-470.   [2] S. H. Saker, Kamenev-type oscillation criteria for forced Emden-Fowler superlinear difference equations, Elect. J. Diff. Eqns. 2002 (2002), no. 68, 1-9. [3] S. H. Saker, New oscillation criteria for second-order nonlinear neutral delay difference equations, Appl. Math. Comp. 142 (2003), 99-111. [4] S. H. Saker, Oscillation theorems of nonlinear difference equations of second order, Georgian Mathematical J. 10, no.2 (2003), 343-352. [5] S. H. Saker, Oscillation of second-order perturbed nonlinear difference equations, Appl. Math. Comp. 144 (2-3) (2003), 305-324. [6] W. T. Li and S. H. Saker, Oscillation of second-order sublinear neutral delay difference equations, Appl. Math. Comp. 146 (2003), 543-551 [7] S. H. Saker and P. J. Y. Wong, Nonexistence of unbounded nonoscillatory solutions of nonlinear perturbed partial difference equations, J. Concrete and Applicable Math. 1 (1) (2003), 87-99. [8] S. H. Saker and S. S. Cheng, Kamenev type oscillation criteria for nonlinear difference equations, Czechoslovak Math.  J. 54 (2004) 955 – 967. [9] S. H. Saker and S. S. Cheng, Oscillation criteria for difference equations with damping terms, Appl. Math. Comp. 148 (2004), 421-442. [10] S. H. Saker, Oscillation of second order nonlinear delay difference equations, Bulletin of  the Korean Math. Soc. 40 (2003), 489-501. [11] S. H. Saker, Oscillation theorems for second-order nonlinear delay difference equations, Periodica Math. Hungarica 47 (2003), 201-213. [12] B. G. Zhang and S. H. Saker, Kamenev-type oscillation criteria for nonlinear neutral delay difference equations, Indian J. Pure Appl. Math 34 (2003), 1571-1584. [13] I. Kubiaczyk, S. H. Saker, J. Morchalo, Kamenev-type oscillation criteria for sublinear delay difference equations, Indian J. Pure Appl. Math. 34 (2003), 273-1284. [14] S. H. Saker, Oscillation of third-order difference equations, Portugalae Mathematica 61 (2004), 249-257.   [15] S. H. Saker, Oscillation criteria of second-order half-linear delay difference equations, Kyungpook Math. J. 45 No. 4 (2005) 579-594. [16] I. Kubiaczyk and S. H. Saker, Oscillation and asymptotic behavior of second-order nonlinear difference equations, Fasc. Math.  No. 34 (2004), 39-54. [17] Y. G. Sun and S. H. Saker, Oscillation for second-order nonlinear neutral delay difference equations,  Appl. Math. Comp. 163 (2005) 909-918. [18] S. H. Saker, Oscillation and asymptotic behavior of third-order nonlinear neutral difference equations, Dynamic Systems & Applications 15 (2006), 549-568.   [19] Y. G. Sun and S. H. Saker, On the oscillation of second-order perturbed nonlinear difference equations,  Dyn. Sys. Appl. 15 (2006), 537-548.   [20] S. H. Saker and B. G. Zhang, Oscillation of second-order nonlinear delay damped difference equations, Acta Matematica Sinica 23, no.4 (2007), 715-722. [21] Y. G. Sun and S. H. Saker, Forced oscillation of higher-order nonlinear difference equations, Appl. Math. Comp. 187 (2007), 868-872. [22] S. H. Saker and P. J. Y. Wong, Oscillation and asymptotic behavior of perturbed nonlinear difference equations, Indian J. Pure Appl. Math. 39 (2008), 105-122. [23] S. H. Saker, New Oscillation Criteria for Third Order Nonlinear Neutral Difference Equations, Math. Slovaca   (accepted)