‣ AttachMatroidsDatabase( ) | ( function ) |
Returns: a an Arango database
Attach the Arango database of matroids at:
http://matroid.mathematik.uni-siegen.de:8529
‣ MatroidByCoatomsNC( d ) | ( operation ) |
Construct the matroid defined by the entries
d.NumberOfAtoms
d.Rank
d.ListOfCoatoms (the maximal proper flats) of the database document d.
‣ EquationsAndInequationsOfModuliSpaceOfMatroid( d, ZZ ) | ( operation ) |
Returns: a list
Get the list of equations and inequations defining the possibly empty moduli space of vector matroids of the matroid over the homalg ring ZZ defined by the document d. This is a quasi-affine representation of the (abstractly) affine moduli space.
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