1. ## span law

k is a group of vectors
W is a subspace.
why if W $\displaystyle \subseteq$k then W $\displaystyle \subseteq$span(k)
??
span(k) is wider then k

it contains all the combinations of k

2. Originally Posted by transgalactic
k is a group of vectors
W is a subspace.
why if W $\displaystyle \subseteq$k then W $\displaystyle \subseteq$span(k)
Are you sure you have copied this correctly? If W is a subset of k then it is trivially a subset of span(k) precisely because k itself is a subset of span(k). W\subseteq k\subseteq span(k)

span(k) is wider then k

it contains all the combinations of k