jets(...,Projective=>...) -- Option for jets

Description

Set the degree of each jet variable to match its order, as in Proposition 6.6 (c) of P. Vojta, Jets via Hasse-Schmidt Derivations. This guarantees that the output of jets is homogeneous.

Further information

• Default value: false
• Function: jets -- compute the jets of an object
• Option key: Projective -- whether to produce a projective Hilbert polynomial

Caveat

With Projective=>true the jet variables of order zero have degree 0, therefore no heft vector exist for the ambient ring of the jets. As a result, certain computations will not be supported, and others may run more slowly. See heft vectors for more information.