Hi,

I just read that the null space for the following matrix

[1 0 1;

5 4 9;

2 4 6]

is the line of all points x = c, y = c, z = -c.

I was wondering what the null space for the matrix with three similar columns would be e.g.

[1 1 1;

0 0 0;

0 0 0]

(c, -c, 0), (-c, 2c, -c), etc are all part of the null space for this matrix but they don't form a line nor a plane.

Any help would be much appreciated.

Regards