Description

S3L_gen_trid_solve solves a tridiagonal system that has been previously factored via a call to S3L_gen_trid_factor.

If D, U, and L are of length n, B (the right-hand side of the tridiagonal system) must be of size n x nrhs. If D, U, and L are multidimensional, axis_d is the axis along which the system is solved. The rank of B must be one greater than the rank of D, U, and L.

If the rank of B is greater than 2, row_b and col_b specify the axes whose dimensions are n and nrhs, respectively. The extents of all other axes must be the same as the corresponding axes of D, U, and L.

When computing multiple tridiagonal systems in which only the right-hand-side matrix changes, the factorization routine S3L_gen_trid_factor need only be called once, before the first call to S3l_gen_trid_solve. Then, S3L_gen_trid_solve can be called repeatedly without calling S3L_gen_trid_factor again.