• Beginning of the words “minimize/argmin” and “subject to”
• The objective function and the longest left hand side of the constraints.
• The $= | > | <$ signs of the constraints.
• Optionally, the user can add manually a double align character && to align some common constraints feature. A clear example could be the constraints names, e.g. (boundary constraint) alignment with (dynamic constraint).

• Where no equation is referenced/numbered.
• Where the problem is referenced with a single number.
• Where each equation has an individual reference.

The author is Jesus Lago Garcia. The package is Copyright © 2016-2017 Jesus Lago Garcia.