MATH 255  Intermediate Introduction to Differential Equations  - Catalog Information
Prerequisites: Math 152 or Math 154  
 

Frequency: Fall/Spring Terms

Credit: (4-0)4  

Content: First order equations and various applications. Higher order linear differential equations. Power series solutions: ordinary   and regular singular points. The Laplace transform: solution of initial value problems. Systems of linear differential equations:  solutions by operator method, by Laplace transform. Introduction to partial differential equations; Separation of variables.  

Goals: The main objective of the course is to present the main concepts in the theory of (ordinary) differential equations and to show how (ordinary) differential equations are used in mathematical models describing meal-live situations.  
 

Course Outline:

  •   (1 Week) Preliminaries. Solutions. Existence-Uniqueness Theorem.  
  •   (1 Week) Separable Equations. Linear Equations. Homogeneous Equations.  
  •   (1 Week) Exact Equations and Integrating Factors.Substitutions.  
  •   Approximate solutions (2.6.1 and 2.6.2). Applications (2.7.2).  
  •   (1 Week) Basic Theory of Higher Order Linear Equations.  
  •   (1 Week) Reduction of Order. Homogeneous Constant Coefficient Equations..  
  •   (1 Week) Undetermined Coefficients. Variation of Parameters.  
  •   (1 Week) The Cauchy-Euler Equations. Operator Method  
  •   (1 Week) Operator Method (continued) Power Series Solutions  
  •   (ordinary points).  
  •   (1 Week) Power Series Solutions (ordinary and regular singular points).  
  •   (1 Week) Power Series Solutions (regular singular points), The Laplace Transform (basic properties.)  
  •   (1 Week) Convolution. Solutions of Differential Equations by the Laplace Transform.  
  •   (1 Week) Solutions of Systems of Linear Differential Equations by the Laplace Transform.  
  •   (1 Week) Solutions of Systems of Linear Differential Equations by Elimination: simple elimination and operator method.  
  •   (1 Week) Partial Differential Equations: Seperation of Variables  
  •   (1 Week) Partial Differential Equations: Seperation of Variables  

Suggested textbook: Şafak Alpay, Ersan Akyıldız, Albert Erkip; Lectures on Differential Equations. Matematik Vakfı, 1995. 
 
 

Reference books: 

  •   B.Kolman; Introductory Linear Algebra with applications. Macmillan Publish Co, 1976.  
  •   H.Anton; Elementary Linear Algebra. John Wiley and Sons. 1994  
    
Notes: 
  • Grading: For the total sum. Letter grades will be given according to the usual catalog. 
  • Make-up Exams: they will be given after each exam, ONLY for students who have an official medical report. Consult your section instructors. 
  • Inspection of Exam Papers: It must be done ONLY at the time which will be announced after each exam. 
  • Section Change: If the schedule of your section does not fit into your program, you may switch to another section without  informing your instructor. 


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