Personal Information

  • Position : Professor
  • Department : Mathematics
  • Specification :
  • Work Phone : 2403866/057
  • Email : elmorshedy@du.edu.eg

E-Courses

Researches

  • 1 - Research Title:
  • Book of abstract
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  • 2 - Research Title:
  • Global attractivity in a population model with nonlinear death rate and distributed delays
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  • 3 - Research Title:
  • On the distribution of zeros of solutions of a first order neutral differential equation
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  • 4 - Research Title:
  • The distribution of zeros of all solutions of first order neutral differential equations
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  • 5 - Research Title:
  • Oscillation and asymptotic behaviour of a class of higher-order non-linear difference equations
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  • 6 - Research Title:
  • On the Global Attractivity,Periodicity and Oscillation of a Single Neuron Model
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  • 7 - Research Title:
  • OSCILLATION CRITERIA FOR CERTAIN SECOND ORDER NONLINEAR DIFFERENCE EQUATIONS
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  • 8 - Research Title:
  • The Global Attractivity of Difference Equations of Nonincreasing Nonlinearities with Applications
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  • 9 - Research Title:
  • New oscillation criteria for second order linear difference equations with positive and negative coefficients
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  • 10 - Research Title:
  • OSCILLATION AND NONOSCILLATION CRITERIA FOR HALF-LINEAR SECOND ORDER DIFFERENCE EQUATIONS
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  • 11 - Research Title:
  • Oscillation and global asymptotic stability of a neuronic equation with two delays
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  • 12 - Research Title:
  • Comparison theorems for second order nonlinear difference equations
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  • 13 - Research Title:
  • Global attractors for difference equations dominated by one-dimensional maps
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  • 14 - Research Title:
  • On the Oscillation and Asymptotic Behaviour of Solutions of a Neuronic Equation
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  • 15 - Research Title:
  • OSCILLATION CRITERIA OF COMPARISON TYPE FOR SECOND ORDER DIFFERENCE EQUATIONS
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  • 16 - Research Title:
  • Convergence to equilibria in discrete population models
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  • 17 - Research Title:
  • The global attractivity of a rational difference equation with variable delays
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  • 18 - Research Title:
  • Oscillation and Nonoscillation Theorems for Certain Second-Order Difference Equations with Forcing Term
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  • 19 - Research Title:
  • New explicit global asymptotic stability criteria for higher order difference equations
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  • 20 - Research Title:
  • Oscillation of some nonlinear difference equations
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  • 21 - Research Title:
  • Globally attracting fixed points in higher order discrete population models
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  • 22 - Research Title:
  • ON THE OSCILLATION OF CERTAIN DIFFERENCE EQUATIONS
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  • 23 - Research Title:
  • Nonoscillation, oscillation and convergence of a class of neutral equations
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  • 24 - Research Title:
  • Periodic points and stability in Clark’s delayed recruitment model
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  • 25 - Research Title:
  • Summation averaging technique for the oscillation of second order linear difference equations
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  1. Nonoscillation, oscillation and convergence of a class of neutral equations
  2. Global attractors for difference equations dominated by one-dimensional maps
  3. Convergence to equilibria in discrete population models
  4. Oscillation and nonoscillation criteria for half-linear second order difference equations
  5. Globally attracting fixed points in higher order discrete population models
  6. The global attractivity of difference equations of nonincreasing nonlinearities with applications
  7. Oscillation criteria of comparison type for second order difference equations
  8. New oscillation criteria for second order linear difference equations with positive and negative coefficients
  9. Comparison theorems for second order nonlinear difference equations
  10. New explicit global asymptotic stability criteria for higher order difference equations
  11. New oscillation criterion for delay differential equations with non-monotone arguments
  12. On the distribution of zeros of solutions of first order delay differential equations
  13. Geometric methods of global attraction in systems of delay differential equations
  14. Global convergence to equilibria in non-monotone delay differential equations
  15. The distribution of zeros of all solutions of first order neutral differential equations
  16. Global attractivity in a population model with nonlinear death rate and distributed delays
  17. Periodic points and stability in Clark's delayed recruitment model
  18. Oscillation of second-order nonlinear difference equations with sublinear neutral term
  19. Criteria of global attraction in systems of delay differential equations with mixed monotonicity
  20. Oscillation of first order linear differential equations with several non-monotone delays
  21. Oscillation and nonoscillation theorems for certain second-order difference equations with forcing term
  22. On the global attractivity and oscillations in a class of second-order difference equations from macroeconomics
  23. Oscillation criteria for first order differential equations with non-monotone delays
  24. Global dynamics of delay recruitment models with maximized lifespan
  25. Summation averaging technique for the oscillation of second order linear difference equations
  26. On the oscillation of certain second order difference equations
  27. Asymptotic convergence in delay differential equations arising in epidemiology and physiology
  28. On the oscillation and asymptotic behaviour of solutions of a neuronic equation
  29. On the distance between adjacent zeros of solutions of first order differential equations with distributed delays
  30. On the distribution of zeros of solutions of a first order neutral differential equation
  31. Oscillation of some nonlinear difference equations
  32. New oscillation criteria for first order linear differential equations with non-monotone delays
  33. Improved oscillation criteria for first order differential equations with several non-monotone delays
  34. Dynamics of some rational difference equations
  35. Oscillation and asymptotic behaviour of a class of higher-order non-linear difference equations
  36. On the oscillation of certain difference equations
  37. Global attractivity for nonautonomous delay-differential equations with mixed monotonicity and two delays
  38. Oscillation conditions for difference equations with several variable delays
  39. OSCILLATION of SECOND-ORDER HALF-LINEAR NEUTRAL NONCANONICAL DYNAMIC EQUATIONS
  40. On the Distribution of Zeros of All Solutions of a First Order Nonlinear Neutral Differential Equation
  41. Corrigendum to:“Periodic points and stability in Clark’s delayed recruitment model”[Nonlinear Analysis: Real World Applications 9 (2008) 776–790]
  42. Oscillation and global asymptotic stability of a neuronic equation with two delays
  43. On the global attractivity periodicity and oscillation of a single neuron model
  44. Oscillation criteria for certain second order nonlinear difference equations
  45. Global attractivity in tick population models incorporating seasonality and diapausing stages
  46. New product-type oscillation criteria for first-order linear differential equations with several nonmonotone arguments
  47. The global attractivity of a rational difference equation with variable delays