Step 1: Define Essential Prime Implicant (EPI).
An Essential Prime Implicant (EPI) is a prime implicant that covers a 1 that no other prime implicant covers.
Step 2: Explanation of Prime Implicant.
A Prime Implicant (PI) whose each 1 is covered by a minimum of one Essential Prime Implicant (EPI) is termed an Essential Prime Implicant. It means that the coverage of 1's is critical and cannot be omitted by any other implicant.
Step 3: Analysis of options.
- (A) Essential prime implicant: This is correct because the definition of EPI matches this description.
- (B) Selective prime implicant: This is incorrect as this term does not refer to the PI covered by EPIs.
- (C) False prime implicant: This is incorrect as false implicants do not satisfy the required conditions.
- (D) Redundant prime implicant: This is incorrect as redundant implicants are not essential to the minimization process.
Step 4: Conclusion.
The correct answer is (A) Essential prime implicant, as it fits the definition provided in the question.
Find the least upper bound and greatest lower bound of \( S = \{X, Y, Z\} \) if they exist, of the poset whose Hasse diagram is shown below:
Suppose \( D_1 = (S_1, \Sigma, q_1, F_1, \delta_1) \) and \( D_2 = (S_2, \Sigma, q_2, F_2, \delta_2) \) are finite automata accepting languages \( L_1 \) and \( L_2 \), respectively. Then, which of the following languages will also be accepted by the finite automata:
(A) \( L_1 \cup L_2 \)
(B) \( L_1 \cap L_2 \)
(C) \( L_1 - L_2 \)
(D) \( L_2 - L_1 \)
Choose the correct answer from the options given below: