I need a lot of help...

[Paul Rubin]

Peter Pearson <pkpearson at nowhere.invalid> writes:
> I don't know any definition of "matrix range" that fits this description.
> Is it possible that someone means "rank"?

Yes, the rank is the dimension of the range unless I'm mistaken.  I
think rank is what was meant.

To find the rank with Gaussian elimination, I guess you could
diagonalize the matrix then count the number of nonzero elements.  Maybe
there's a better way.