Law and Order - Map Projections: Cartographic Information Systems - page 672

5

A × B

4

3

y

2

1

1 2 3 4 5

x

Fig. A.6. Cartesian product A × B ; A := { x ∈ N | x ∈ [1; 3] ∨ x =4 } and B := { y ∈ N | y ∈ [1; 2] ∨ y =3 }

5

A × B

4

3

y

2

1

1 2 3 4 5

x

Fig. A.7. Cartesian product A × B ; A := { 1 , 2 , 3 } and B := [1; 2[ ∪{ 3 }

5

4

3

y

A × B

2

1

1 2 3 4 5

x

Fig. A.8. Cartesian product A × B ; A := [1; 2] ∪ ]3;4[and B := [0; 1] ∪ [3; 4[