SimplexTableau (linear programming)

Class SimplexTableau is package private and does not seem designed for inheritance, but it contains "protected" methods.

There are several instance fields that should preferably be made "final" (for thread safety). It seems that to do this, some design changes are necessary (a.o. the relationship with SimplexSolver should be clarified).

 
SimplexSolver also contains a protected method (solvePhase1) that is not documented for inheritance.