English

Graded algebras with prescribed Hilbert series

Rings and Algebras 2020-01-07 v1 Number Theory

Abstract

For any power series a(t)a(t) with exponentially bounded nonnegative integer coefficients we suggest a simple construction of a finitely generated monomial associative algebra RR with Hilbert series H(R,t)H(R,t) very close to a(t)a(t). If a(t)a(t) is rational/algebraic/transcendental, then the same is H(R,t)H(R,t). If the growth of the coefficients of a(t)a(t) is polynomial, in the same way we construct a graded algebra RR preserving the polynomial growth of the coefficients of its Hilbert series H(R,t)H(R,t). Applying a classical result of Fatou from 1906 we obtain that if a finitely generated graded algebra RR has a finite Gelfand-Kirillov dimension, then its Hilbert series is either rational or transcendental. In particular the same dichotomy holds for the Hilbert series of finitely generated algebras RR with polynomial identity.

Keywords

Cite

@article{arxiv.2001.01064,
  title  = {Graded algebras with prescribed Hilbert series},
  author = {Vesselin Drensky},
  journal= {arXiv preprint arXiv:2001.01064},
  year   = {2020}
}

Comments

LATEX, 8 pages

R2 v1 2026-06-23T13:02:47.954Z