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D.5.1.7 rncItProjOdd
Procedure from library paraplanecurves.lib (see paraplanecurves_lib).
- Usage:
- rncItProjOdd(I); I ideal
- Assume:
- I is a homogeneous ideal in the basering with n+1 variables
defining a rational normal curve C in PP^n with n odd.
- Note:
- The procedure will fail or give a wrong output if I is not the
ideal of a rational normal curve. It will test whether n is odd.
- Return:
- ideal PHI defining an isomorphic projection of C to PP^1.
Note that the entries of PHI should be considered as
representatives of elements in R/I, where R is the basering.
- Theory:
- We iterate the procedure rncAntiCanonicalMap to obtain PHI.
Example:
See also:
rncItProjEven.
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