In: Advanced Math
Given a set S = {1, -1, i, -i} where i2 = -1 and with multiplication * on this set,
* |
1 |
i |
-1 |
-i |
1 |
1 |
-1 |
-i |
|
i |
i |
-1 |
||
-1 |
||||
-i |
(b) Determine whether, or not, the operation * is a binary operation on S.
(c) Is * commutative on S?
(d) Investigate the following properties of binary operations for this operation on S:
i. Closed
ii. Identity
iii. Inverse
iv. Associativity