where A(1:N, JA:JA+N-1) is the matrix used to produce the factors
stored in A(1:N,JA:JA+N-1) and AF by PDPBTRF.
A(1:N, JA:JA+N-1) is an N-by-N real
banded symmetric positive definite distributed
matrix with bandwidth BW.
Depending on the value of UPLO, A stores either U or L in the equn
A(1:N, JA:JA+N-1) = U'*U or L*L' as computed by PDPBTRF.