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Math 53
Spring 2026

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This schedule is tentative, and may be adjusted as necessary.

Week Date Chapter Homework Assignment
1 March 30
April 1
April 3
1: What is a differential equation?
2: First-order ODE's: autonomous, separable, and initial value problems
3: First-order ODE's: dynamic perspectives
Homework 1
(due April 8)
2 April 6
April 8
April 10
4: Stationary values, stability, and phase line
5: Complex numbers
6: Second-order linear ODE's and initial value problems
Homework 2
(due April 15)
3 April 13
April 15
April 17
7: Homogeneous linear ODE systems and eigenvectors
8: Further applications of eigenvalues to ODE's
9: Two-dimensional homogeneous linear ODE systems and eigenvalues
Homework 3
(due April 22)
4 April 20
April 22
April 24
10: Solving inhomogeneous first-order linear ODE's
11: Solving inhomogeneous second-order linear ODE's
12: Chaos, bifurcation, and sensitive dependence on initial conditions & parameters
Homework 4
(due April 29)
5 April 27
April 29
May 1
13: Non-linear ODE systems: the role of linearization
14: Monotone and conserved quantities
15: Power series methods
Homework 5
(due May 6)
6 May 4
May 6
May 8
16: Introduction to numerical methods
17: Runge-Kutta methods and stiff ODE's
18: Introduction to PDE's
Homework 6
(due May 13)
7 May 11
May 13
May 15
19: Separation of variables for the heat equation
20: Fourier series for periodic functions
21: Solving PDE's via separation of variables and Fourier series
Homework 7
(due May 20)
8 May 18
May 20
May 22
22: More applications of separation of variables and Fourier series
23: Exponential Fourier series and transform perspective
24: Introduction to the Fourier transform
Homework 8
(due May 27)
9 May 25
May 27
May 29
No Class: Memorial Day
25: Gaussians and the heat equation on a line
26: Convolution and the wave equation on a line
Homework 9
(due June 3)
10 June 1
June 3
27: Applications of the Fourier transform
Final Exam Review
 

Spring 2026 -- Department of Mathematics, Stanford University
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