Given a symmetric 2x2 matrix, what would be the way to calculate the square root of it?(adsbygoogle = window.adsbygoogle || []).push({});

Here, http://www.jstor.org/stable/2689616?seq=2 , it is announced that a relatively simple formula

could be applied for the resulting matrix entries, but I could not access it further.

Thanks

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# The square root of a 2x2 matrix

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