| http://www.w3.org/ns/prov#value | - The square root of the identity matrix has an infinite number of solutions (if we use $\mathbb{C}$ as our field): en.wikipedia.org/wiki/Square_root_of_a_matrix#Properties But.... your question was a general one, so in particular if I take the $\sqrt{I} = I$ as one such solution, then I have come up with a counter-example.
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