In relational algebra, which operation is used to

Statements:  J > K ≥ L = M; N ≥ K > P

Conclusions:     

  I.  J > P

II .  L ≥ N

III. P =M

Statements: G < H  ≤  I, V  ≥ W = G, R  ≥ I = A

Conclusions :

I. R > G

II. A ≥ H     

 III. H ≤ R

Statements:  C $ O, O% D, A © D

Conclusions: 

I. A © O 

II. D @ C 

III. C © A

Statements : Q = R; S ≥ T; P ≤ Q; R > V; R > S; T ≥ U

Conclusions :

(i) R > U (ii) V ≥ U (iii) P = R (iv) P < R

Statements: D ≤ P > J > N > G, P ≤ R < V, N < K

Conclusions:

I. J < V

II. D > G

Statements:  P > Q > R > S > T < U < V < W < X

Conclusion:

I.  P > T

II.  U < X

Statement: W ≥ V > U < G ≥ S; V ≥ I = P

Conclusion: I. W > I            II. W = P

Statements: E > O, S < Z, O ≤ S

Conclusions:

I. E < S

II. O < Z

Statement: D < E < F ≥ G; D ≥ H > I

Conclusion: I. F > I          II. F = I