View Forum Topic

Forums
CS480
slide 29 of lecture 7

Author	Message
aligh1979 Posts: 121	Posted 11:55 Oct 21, 2011 \| The set Z with two operations, addition and multiplication, R = <Z, +, ×>, is a commutative ring Which operations are allowed in this set Addition , Subtraction , Multiplication , division why is division allowed ? the set is Z , so we do not have any mod operation anymore and apparently not all elements have inverse for "X" operation . and if we divide 2 numbers like 3 / 2 = 1.5 which is not in the set Last edited by aligh1979 at 11:55 Oct 21, 2011.
hpguo Posts: 139	Posted 12:31 Oct 21, 2011 \| I didn't answer the question. I was asking you the question.

Author

Message

aligh1979

Posts: 121

Posted 11:55 Oct 21, 2011 |

The set Z with two operations, addition and multiplication, R = <Z, +, ×>, is a commutative ring
Which operations are allowed in this set

Addition , Subtraction , Multiplication , division

why is division allowed ? the set is Z , so we do not have any mod operation anymore and apparently not all elements have inverse for "X" operation . and if we divide 2 numbers like 3 / 2 = 1.5 which is not in the set

Last edited by aligh1979 at 11:55 Oct 21, 2011.

hpguo

Posts: 139

Posted 12:31 Oct 21, 2011 |

I didn't answer the question. I was asking you the question.