Convergence Rate for Numerical Methods: Conditions and Positivity

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SUMMARY

The convergence rate of a numerical method must be positive to indicate that the solution is improving over iterations. A convergence rate less than 1 is a necessary condition for stability, ensuring that the method approaches the true solution. A zero or negative convergence rate signifies divergence, meaning the method fails to yield a reliable solution. Defining convergence rate precisely is crucial for understanding its implications in numerical analysis.

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Homework Statement



If we find the convergence rate of a numerical method, does this rate have to be positive? and are there any conditions eg rate must be less than 1?

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The Attempt at a Solution



Thank you
 
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what do you think?

zero or negative convergence rate would imply that the solution is not improving or actually diverging to me.

it may help to define exactly what the convergnce rate actually is
 

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