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How do we know if the results are right? Let's spot-check the result for ri=1e-2 m against the previous step; this value of ri corresponds to k=6. What is your value of sigma_x(k) for k=6? You can check this from the output or by typing sigma_x(6)
at the command line. My value is exactly the same as in Step 2 ... nailed that one! How about you?
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