Question: =+6. Let V be a vector space over a field F. Define s : P(V) ~ P(V) by b'X E P(V), s(X) = the intersection

=+6. Let V be a vector space over a field F. Define s : P(V) ~ P(V)

by b'X E P(V), s(X) = the intersection of all subspaces of V that contain X. Show that s satisfies the Exchange Property.

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