6.2.28 BINARY RELATIONS

Condition: prove that for any relationship \ (\ alpha, \ beta, \ gamma \) set on the set \ (A \) is performed \ [(\ alpha \ cdot \ beta) \ cdot \ gamma = \ alpha \ cdot \ gamma) \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \] \]