Talk:Matrix-exponentiation operator

The implementations seem to be wrong. Matrix exponentiation is defined for any complex power. For example, like for numbers sqrt A = A**0.5. The implementation can be based on decomposition: A = V^T diag{λ₁,..,λ_n} V. Then A^X = V^T diag{λ₁^X,..,λ_n^X} V