Nech� {$V _{1},V_{2}\subset \subset \er^{4}.  $} Ur�ete dimenze {$ V_{1}
, V_{2}, V_{1}\oplus V_{2}, V_{1}\cap V_{2}$}, kde
\par{$V_{1}=[(5,7,-1,3),(1,-3,8,2),(-2,6,-16,-4)], $}
\par{$ V_{2}=[(6,4,7,5)]. $}