Math 308-505, 506, Spring 2015, Tentative Day by Day Schedule

 01/21. Solutions of some differential equations (first order linear equations with constant coefficients, section 1.2)

01/23 Separable equations (section 2.2);
direction field (sections 1.1)

 01/26 Direction field (continued
), autonomous equations, and population dynamics (sections 1.1 and 2.5 combined);

 01/28
Autonomous equations and population dynamics (section 2.5 continued). Linear equations: Method of integrating factors (section 2.1);

  01/30 Linear equations: Method of integrating factors (section 2.1 continued).

 02/02 Modelling with first order equations (section 2.3);

 02/04  Differences between linear and non-linear equations (section 2.4).
Exact equations (section 2.6);

  02/06 Exact equations and integrating factors (section 2.6 continued). Solutions of linear homogeneous equations of second order (section 3.2);

 02/09 The Wronskian (section 3.2); 
Linear homogeneous equations of second order with constant coefficients: the case of distinct roots of characteristic equation (section 3.1);

  02/11 Review of complex numbers.

 02/13 Linear homogeneous equations of second order with constant coefficients:  the case of
complex roots of the characteristic equation (section 3.3);

 02/16 The case of repeated roots (section 3.4);
The method of reduction of order (section 3.4)

 02/18  Non-homogeneous equations; Method of undetermined coefficients (section 3.5);

 02/20
Method of undetermined coefficients (section 3.5, continued).

 02/23 Method of variation of parameters (section 3.6);

02/25 Mechanical and electrical vibrations (section 3.7);

02/27 Forced vibrations (section 3.8);

03/02 Definition of Laplace transform (section 6.1). Solution of initial value problems using Laplace transform (section 6.2);

03/04 Solution of initial value problems using Laplace transform (section 6.2 continued).

03/06 Step functions. Differential equations with discontinuous forcing functions (sections 6.3 and 6.4);

03/09
  Differential equations with discontinuous forcing functions (section 6.4 continued); Impulse functions (section 6.5); 

03/11 
Impulse functions (section 6.5 continued); The convolution integral;

03/13 Introduction and review of matrices (section 7.1 and 7.2);

03/23 Linear algebraic equations: linear independence, eigenvalues, eigenvectors (section 7.3);

03/25 
Basic theory of systems of first order linear equations (section 7.4);

03/27  Homogeneous linear systems with constant coefficients, the case of distinct eigenvalues (section 7.5);
 

03/30
Complex eigenvalues (section 7.6);

04/01 
Fundamental matrices (section 7.7);
 
04/06. Repeated eigenvalues (section 7.8);

04/08. Repeated eigenvalues (section 7.8, continued);

04/10
Nonhomogeneous linear systems: variation of parameter (section 7.9);
 
04/13 The Phase Plane; Linear Systems (section 9.1);

04/15 Autonomous Systems and Stability (section 9.2);

04/17
Locally Linear Systems (section 9.3);

04/20
Review of power series (section 5.1);

04/22  Series solutions near an ordinary point, part I (section 5.2);

04/24 Series solutions near an ordinary point, part II (section 5.3);

04/27  Euler equations; Regular singular points (section 5.4);

04/29 Series solution near a regular singular point, part I (section 5.5)
;
 
05/01. Series solution near a regular singular point, part II (section 5.6);

05/04
Competing Species,  Predator-Prey Equations (sections 9.4-9.5).;
 05/05 Review before the final exam.