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Topic: A certain type of matrix: any name or applications?
Replies: 3   Last Post: Mar 27, 2009 5:30 AM

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Posts: 38
Registered: 10/27/05
Re: A certain type of matrix: any name or applications?
Posted: Mar 18, 2009 1:01 PM
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On Mar 17, 2:01 pm, jude <jw12jw12j...@yahoo.com> wrote:
> Is there a name for the following type of matrix (probably not) , or
> (more possibly) some context or application where they appear?
> (1) each entry is 1, 0, or -1
> (2) the entries in each row add to 1
> (3) each column vector only occurs once, and no column and its
> negative both appear.
> (4) the zero vector is not allowed as a column

oops. I should have said: the entries in each row add to 0


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