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In any Simplex table, the intersection of any basic variable with itself is always one and the rest of the column is zeroes.2. In any simplex table, the objective function row (Z row) is always in terms of the non-basic variables. This means that under any basic variable (in any table) there is a zero in the Z row. For the non basic there is no condition ( it can take any value in this row).3. If there is a zero under one or more non-basic variables in the last table (optimal solution table), then there is a multiple optimal solution.4. When determining the leaving variable of any table, if there is no positive ratio (all the entries in the pivot column are negative and zeroes), then the solution is unbounded.5. If there is a tie (more than one variables have the same most negative or positive) in determining the entering variable, choose any variable to be the entering one.
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