Question as the title. Consider the $1 \times 1$ matrix $M$ whose single entry is $M_{11} = -1$.
What are the factors in the SVD of $M$? Keep in mind that singular values are non-negative by convention.
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What are your thoughts? What have you tried? – angryavian Apr 25 '19 at 05:00
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$-1 \cdot 1 \cdot 1$ or $1 \cdot 1 \cdot -1$. – copper.hat Apr 25 '19 at 05:02
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$-1=1\cdot 1\cdot (-1)$ – Dirk Apr 25 '19 at 05:03