sentences:  Since these four row vectors are linearly independent, the row space is 4-dimensional.Moreover, in this case it can be seen that they are all orthogonal to the vector n = (6,−1,4,−4,0), so it can be deduced that the row space consists of all vectors in R5 that are orthogonal to n.
  
  Let "K" be a field of scalars.Let "A" be an "m" × "n" matrix, with column vectors v1, v2, ..., v"n".