// create a random symmetric matrix
SimpleMatrix A = SimpleMatrix.wrap(RandomMatrices.createSymmetric(width,-1,1,rand));
TridiagonalDecompositionHouseholderOrig decomp = new TridiagonalDecompositionHouseholderOrig();
decomp.decompose(A.getMatrix());
D1Submatrix64F Ab = insertIntoBlock(offX,offY,A,r);
D1Submatrix64F V = new D1Submatrix64F(new BlockMatrix64F(r,offX+A.numCols(),r));
V.col0 = offX;
V.row1 = Ab.row1-Ab.row0;