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D.15.23.8 projectiveBundle

Procedure from library schubert.lib (see schubert_lib).

Usage:
projectiveBundle(S); S sheaf

Input:
a sheaf on an abstract variety

Return:
variety

Theory:
create a projective bundle as an abstract variety. This is related to the enumeration of conics.

Example:
 
See also: Grassmannian; projectiveSpace.


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