If I do
using LinearAlgebra A = randn(100,100) B = A'*A C = eigen(B)
then how could I avoid allocating more memory by the next call to
eigen with a 100 by 100 symmetric matrix? In other words, how could I reuse C?
(I can see that Eigen is itself immutable, but its elements include a vector and matrix and I should be able to overwrite those.)