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Topic: Construct a subset of two dimensional space
Replies: 4   Last Post: May 9, 2009 7:17 AM

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Mollier

Posts: 1
From: Bergen
Registered: 12/6/08
Construct a subset of two dimensional space
Posted: Dec 6, 2008 4:50 AM
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Hi,
I'm going through the mit linear algebra online course and have a little question.

There is an assigment asking to construct a subset of two dimensional space closed under addition and even subtraction, but not under multiplication.

The closed under subtraction part is giving me problems, could someone please help me with this? Thank you.



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