- #1
seyma
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Homework Statement
I have a trouble in this proof;
Let A be an m[tex]\times[/tex]n matrix and B n[tex]\times[/tex]m matrix. If m[tex]\neq[/tex]n show that at least one of the matrices AB and BA is singular.
Homework Equations
If it is singular not invertible and det=0 but how can I apply this question?