Proceedings Mathematical Sciences

, Volume 102, Issue 2, pp 93–123

Combinatorial meaning of the coefficients of a Hilbert polynomial

  • M. R. Modak


In [1] Abhyankar defines an idealI(p, a) generated by certain minors of a matrixX, the entries ofX being independent indeterminates, and proves that the Hubert function ofI(p, a) coincides with its Hilbert polynomialF(V) and obtains it in the form
$$F(V) = \sum\limits_{D \geqslant 0} {( - 1)} ^D F_D (m,p,a)\left( \begin{gathered} c - D + V \hfill \\ V \hfill \\ \end{gathered} \right)$$
. He also proves thatF(V) is the number of certain “indexed” monomials of degreeV in the entries ofX and that the coefficientsFD(m,p,a) are non-negative integers and asks for their combinatorial meaning. In this paper we characterize the indexed monomials in terms of certain sets of lattice paths, called frames, and prove that the coefficientsFD(m, p, a) count certain families of such frames.


Determinantal ideals Hilbert polynomial lattice paths binomial determinants 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Indian Academy of Science 1992

Authors and Affiliations

  • M. R. Modak
    • 1
  1. 1.Department of MathematicsS. P. CollegePuneIndia

Personalised recommendations