
Re: A certain type of matrix: any name or applications?
Posted:
Mar 18, 2009 1:01 PM


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
jw

