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Macaulay2 web site
SpecialFanoFourfolds
::
map(SpecialGushelMukaiFourfold)
map(SpecialGushelMukaiFourfold) -- associated quadratic map
Synopsis
Usage:
map X
Function:
map
Inputs:
X
,
an instance of the type
SpecialGushelMukaiFourfold
, containing a surface
S⊂Y
, where
Y⊂ℙ
8
is the unique del Pezzo fivefold containing
X
Optional inputs
:
Degree => ...
, -- set the degree of a map
DegreeLift => ...
,
DegreeMap => ...
,
Outputs:
an instance of the type
RationalMap
, the rational map from
Y
defined by the linear system of quadrics through
S