[Octave-bug-tracker] [bug #29768] logm fix

[Jaroslav Hajek]

Follow-up Comment #14, bug #29768 (project octave):

Notice the huge increase of time consumed by th eschur decomposition itself.
This is because schur(..., "complex") is performed completely in complex
arithmetics, which is quite wasteful. A much better approach would be to start
with the real factorization and convert it to the complex one by factoring 2x2
diagonal blocks. Matlab even has a function for it, rsf2csf.


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