HP-41 and 42s: AIP with or without sign?

[Ángel Martin]

(06-08-2018 11:45 PM)Valentin Albillo Wrote:  Of course it does exist, the very link you include to the Wikipedia article gives the particular cases for 2x2, 3x3 and 4x4 and also the general formula. However, it gets very unwieldy very soon, beginning with 5x5, and so it ceases to be a feasible solution, the coefficients are difficult to obtain and the number of terms in the summation and the matrix powers required increase very quickly.

My eyes are quickly approaching the mole-status, my bad of course - and I agree that formula isn't practical at all beyond n=4. Also agree this conversation should be transferred to another thread, coming soon...