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(* GNU General Public License for more details.                       *)
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(* 02110-1301 USA                                                     *)
(** * algebraic_span_facts.v *)
Set Implicit Arguments.
Unset Strict Implicit.
Require Export spans.
From Algebra Require Export Inter.
Section MAIN.
Variable F : field.
Variable V : vectorspace F.

Lemma span_idempotent :
forall S : part_set V, span S =' span (span S) in part_set V.