The transitive reflexive reduction of a partial order. An element z of a partially ordered set (X, <=) covers another element x provided that there exists no third element y in the poset for which x<=y<=z. In this case, z is called an "upper cover" of x and x a "lower cover" of z.
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Jonathan is doing really well in all of his classes this semester, 5 A’s & 2 B’s (he has a computer essentials class instead of PLC). In his Algebra class that Nathan is helping him with he has an A+.
Sarah is very positive, enthusiastic and encourages my daughter to do better each time she comes. My daughter’s grade has improved, we are very grateful for Sarah and that she is tutoring our daughter. Way to go ClubZ!
