Practice Example Problems - 18.5 | 18. Stability and Convergence of Methods | Mathematics - iii (Differential Calculus) - Vol 4
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Practice Questions

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Question 1

Easy

What does stability in numerical methods refer to?

💡 Hint: Think about what happens to a ship in rough waters.

Question 2

Easy

What is the significance of the Lax Equivalence Theorem?

💡 Hint: Remember the relationship between stability and convergence.

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Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the stability condition for a numerical method?

  • |𝑅(ℎ𝜆)| ≤ 1
  • |𝑅(ℎ𝜆)| > 1
  • |𝑅(ℎ)| = 1

💡 Hint: Remember, if the stability function is greater than 1, errors will grow.

Question 2

True or False: A stable method guarantees convergence.

  • True
  • False

💡 Hint: Consider the Lax Equivalence Theorem.

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Challenge Problems

Push your limits with challenges.

Question 1

Derive the stability condition for a modified Euler method applied to the equation 𝑦' = -𝜆𝑦, where 𝜆 > 0.

💡 Hint: Start by expressing the numerical iteration and finding the corresponding stability function.

Question 2

Apply the Backward Euler method to the equation 𝑦' = -2𝑦 and discuss its properties, leveraging A-stability.

💡 Hint: Evaluate the backward difference and its relation to the stability function.

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