A simple SVD calculator

The latest experiment, a Simple SVD calculator, is the result of an attempt to port code from the NIST Template Numerical Toolkit (TNT) to JavaScript (specifically, the Singular Value Decomposition calculation code). Seems to be working. Standard disclaimers apply.

After writing a few functions to support vectors and matrices in a manner as syntactically close to the NIST source as possible, things went across pretty cleanly with minor modifications. (Basic rule of porting: if it's complicated, make as few changes to the source as possible.)

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