Hi,
I am trying to do the following sparse matrix multiplication but it fails.

Eigen::SparseMatrix<double,Eigen::ColMajor> A; //Where A is a square matrix with rows = columns = ~4million
Eigen::SparseVector<double> x; //where rows are equal to A.rows()
I am interested in:
Eigen::SparseMatrix<double,Eigen::ColMajor> output;
output = A.colwise(x*x.transpose());
but it fails with a memory error.
Could you please tell me how to solve this issue.