How do I calculate the distance of the ∞-norm between two vectors in lR^3?

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SUMMARY

The distance of the ∞-norm between two vectors in ℝ³ is calculated by first subtracting the vectors and then applying the norm. Specifically, the formula used is ||u - v||, where u and v are the vectors in question. This method aligns with the definition of a normed distance in metric spaces, confirming that the correct approach is to find the difference before taking the maximum value of the absolute differences.

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Mindscrape
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Alright, so if I want to find the distance of the ∞-norm between two vectors in lR^3, then would I take the max of the vectors first and then subtract, or should I subtract the vectors and then take the max? I think that the vectors are subtracted, and then the norm is taken, but I just want to make sure.
 
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You have it correct: find the difference, then apply the norm. This is the definition of a normed distance (i.e., that is how you calculate the distance in any metric space where distance is defined by some norm on the space).
 
In fact, in any norm, the distance between two vectors u and v is given by ||u- v||.
 

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