Laguerre's Method - Definition

Definition

The above derivation leads to the following method:

  • Choose an initial guess
  • For k = 0, 1, 2, …
    • Calculate
    • Calculate
    • Calculate, where the sign is chosen to give the denominator with the larger absolute value, to avoid loss of significance as iteration proceeds.
    • Set
  • Repeat until a is small enough or if the maximum number of iterations has been reached.

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