New feature "bandwidth"
Setting a bandwdith of the input matrix via elpa%set("bandwidth",bw) tells ELPA 2stage, that matrix is already a banded matrix with bandwidth bw. Then some compute steps can be skipped
Setting a bandwdith of the input matrix via elpa%set("bandwidth",bw) tells ELPA 2stage, that matrix is already a banded matrix with bandwidth bw. Then some compute steps can be skipped