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https://jjthetutor.com/let-s-u_1-u_2-u_n-be-a-linearly-independent-subset-of-a-vector-space-v-over-the-field-z_2-how-many-vectors-are-there-in-spans/
Let S = { u_1, u_2, ... , u_n} be a linearly independent subset of a vector space V over the field Z_2. How many vectors are there in span(S)?