Matrix-exponentiation operator: Difference between revisions

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This solution is not tested, because the available version of GNAT GPL Ada compiler (20070405-41) does not provide an implementation of the standard library.
 
''(Another person is talking here:)'' I have made small corrections and tested this in 2023, and it did not work as I expected. However, I have questions about the mathematical libraries (to put it mildly). I tried both GCC 12 and GCC 13. (I also tried the last GNAT Community Edition, but it no longer functions on my system.) What might be needed here is one's own eigensystem routine.
 
On the other hand, I did get a version working to raise a real matrix to a natural number power, thus demonstrating the correctness of the approach:
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