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Macaulay2 website
Cremona
::
source(RationalMap)
source(RationalMap)  coordinate ring of the source for a rational map
Synopsis
Function:
source
Usage:
source phi
Inputs:
phi
,
a
rational map
Outputs:
a
ring
, the coordinate ring of the source of
phi
Description
This is equivalent to
target map phi
.
See also
target(RationalMap)
 coordinate ring of the target for a rational map
Ways to use this method:
source(RationalMap)
 coordinate ring of the source for a rational map