Constants of Differentiation and Differential Ideals

Details Constants of Differentiation and Differential Ideals Constants of Differentiation and Differential Ideals

2003-11-02

arxiv.org/abs/math/0311007v2

Mathematics

Commutative Algebra

Latex, 9 pages The first paper had mathematical errors. The results in this replacement paper are similar to the original pape

Scientific paper

Let R be a differential domain finitely generated over a differential field, F, with field of constants, C, of characteristic 0. Let E be the quotient field of R. The paper investigates necessary and sufficient conditions on R's differential ideals for the constants of differentiation of E to also be C (no new constants). It was known that no proper nonzero differential ideals guarantees no new constants. The paper shows that when C is algebraically closed that if R has only finitely many height one prime differential ideals that E will have no new constants. An example with F infinitely generated over C shows the converse is false. The paper gives conditions on C and F so that when F is finitely generated over C and R is a polynomial ring over F that no new constants in E implies that R has only fintely many height one prime differential ideals.

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