Module 2: Single Step Methods
  Lecture 7: Stability
 

 

We solve it by Euler's method using mesh size . We compute and the results are tabulated as follows:

Table-2.2

Effect of Absolute Stability

h

N

y(1)

1

1

0

0.1

10

0.9044 E 16

0.01

100

Overflow

0.001

1000

0.99999

0.0001

10000

0.99999

0.00001

100000

0.99999

We can notice that overflow occurs because for this problem and so with the error is amplified by at each step. In 100 steps, the error in the first step is increased by nearly in size. Once we find the computed solutions are meaningful and converge to the true solution.