todo: remove the below functions.

1 -> A, 2 -> B, 3 -> C, ..., 26 -> Z, 27 -> AA, 28 -> AB, ...

SCA solves the non-negative least squares problem.

SCAKKT solves the non-negative least squares problem.

SCALimit solves the non-negative least squares problem.

for MP source with header and contents in the same file.

,.

e.g.

e.g.

Limit is an absolute limit on number of iterations.

bi-directional map.