SCC121: (W2-L2) Relations - Part 2

Question 1

what is the symbol for an order pair?

Answer 1

<a, b>

Question 2

What does an ordered pair represent?

Answer 2

A pair of elements with an order associated with them

Question 3

what is the notation for a binary relation?

Answer 3

R over A x B

Question 4

What is a binary relation?

Answer 4

A set of ordered pairs <a, b>, where a is paired with b through the relation R

Question 5

What is the symbol for an ordered n-tuple?

Answer 5

<x1, x2, …, xn>

Question 6

What does an ordered n-tuple represent?

Answer 6

A set of n objects with an order associated with them

Question 7

What is the notation for the Cartesian product of n sets?

Answer 7

A1 x A2 x … X An

Question 8

whats does the cartesian product of n sets represent?

Answer 8

The set of all possible ordered n-tuples <x1, x2, …, xn

Question 9

what is the notation for n-ary relation

Answer 9

R over A1 x A2 x … x An

Question 10

what is an n-ary relation

Answer 10

A set of of ordered n-tuples <a1, a2, …, an>

Question 11

What is the union of relations R1 and R2?

Answer 11

The set of all ordered pairs <a, b> that are in R1, or R2, or both