The condition number of a matrix
How far the solution of $Ax = b$ moves when the data does, why the determinant and the entry sizes say nothing about it, and why a small residual is not a small error.
About 20 minutes6 activities Paper packet
How far the solution of $Ax = b$ moves when the data does, why the determinant and the entry sizes say nothing about it, and why a small residual is not a small error.
About 20 minutes6 activities Paper packet