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.. (לתיקייה המכילה) | |
In question 2b, what does it mean for a book to be in the book club? | |
| Think of these books as the elite books |
In question 2d-1, what does it mean that without difference, RA is monotonic? | |
| For all other operators, if you apply them on relations A_1, A_2 and B_1, B_2, and A_i is larger then B_i, then the result for applying the operator on A_i will be larger then applying it on B_i. |
Clarification for question 1 | |
| a member in the book club in one library can loan elite books from any library. |