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toDual -- finds the inverse system to an ideal up to a given degree



If I is an ideal, then toDual(d,I) = inverseSystem(d, I). See the documentation of InverseSystems for the basic theory and of inverseSystem for the function.

If I is a matrix, then the code first replaces it with the ideal generated by the entries.


The Base ring of the input must be a standard graded polynomial ring over a field.

See also

Ways to use toDual :

For the programmer

The object toDual is a method function with options.