This would be really nice to have. I tried recently to use the unsupported matrix power, and ran into a number of segfaults for very simple matrix powers:
A << 1, 1, 4, -2;
//std::cout << Apow(3.1) << "\n\n";
//std::cout << A.pow(3.1) << "\n\n";
//std::cout << A.pow(3.1).eval() << "\n\n";
//B = A.pow(3.1);
I use matrix power a lot, it would be nice if this worked in Eigen.
Actually this entry is about coefficient-wise power, see the function signatures. So let's continue your issue on bug 614.
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