/// <summary>
/// Try to add expr directly to the tableau without creating an
/// artificial variable.
/// </summary>
/// <remarks>
/// We are trying to add the constraint expr=0 to the appropriate
/// tableau.
/// </remarks>
/// <returns>
/// True if successful and false if not.
/// </returns>
private bool TryAddingDirectly(ClLinearExpression expr)
/* throws ExClRequiredFailure */
{
ClAbstractVariable subject = ChooseSubject(expr);
if (subject == null)
{
return(false);
}
expr.NewSubject(subject);
if (ColumnsHasKey(subject))
{
SubstituteOut(subject, expr);
}
AddRow(subject, expr);
return(true); // succesfully added directly
}
/// <summary>
/// Try to add expr directly to the tableau without creating an
/// artificial variable.
/// </summary>
/// <remarks>
/// We are trying to add the constraint expr=0 to the appropriate
/// tableau.
/// </remarks>
/// <returns>
/// True if successful and false if not.
/// </returns>
protected bool TryAddingDirectly(ClLinearExpression expr)
/* throws ExClRequiredFailure */
{
if (Trace)
FnEnterPrint("TryAddingDirectly: " + expr);
ClAbstractVariable subject = ChooseSubject(expr);
if (subject == null)
{
if (Trace)
FnExitPrint("returning false");
return false;
}
expr.NewSubject(subject);
if (ColumnsHasKey(subject))
{
SubstituteOut(subject, expr);
}
AddRow(subject, expr);
if (Trace)
FnExitPrint("returning true");
return true; // succesfully added directly
}
