# Math Help - Matrix question...just a thought

1. ## Matrix question...just a thought

I was wondering, how come when AX=0, A is equal to the identity matrix?

2. Originally Posted by buckaroobill
I was wondering, how come when AX=0, A is equal to the identity matrix?
You appear to be confused. If A is non singular AX=0 implies that X is the zero vector.

In general AX=0 means that X is in the null space of A, and may be non-zero if A is singular.

RonL