band1_backsolve_mat: Backward substitution with band 1 lower Cholesky triangle and tridiagonal
RHS.
Description
Backward substitution with band 1 lower Cholesky triangle and tridiagonal
matrix on the right hand side.
Usage
band1_backsolve_mat(L, Q)
Arguments
L
A lower triangular square matrix with non-zero entries only on the
main diagonal and the first subdiagonal.
Q
A tridiagonal matrix with the same dimensions as L.