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Schemes [HB 92]
New Features:
- Intrinsic ArithmeticGenus added for ordinary projective
varieties.
- To work with the tangent and secant varieties of schemes,
TangentVariety, SecantVariety,
IsInTangentVariety and IsInSecantVariety have been
added.
- Intrinsic IsomorphicProjectionToSubspace added. This finds
a sequence of point projections of a projective scheme of
dimension d down to a 2d + 1 linear subspace of its ambient
space such that the combined projection is an isomorphism of the
scheme onto its image.
- Intrinsic EmbedPlaneCurveInP3 added. This gives a non-singular
projective plane or (3D-)space curve birationally equivalent
to the original plane curve.
- The intrinsic IsAmbient has been provided for schemes.
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