# A characterization of the Macaulay dual generators for quadratic complete intersections

## TL;DR

This paper characterizes Macaulay dual generators for certain Gorenstein subalgebras of Artinian algebras derived from homogeneous polynomials, and provides conditions for these algebras to be complete intersections.

## Contribution

It offers a description of Macaulay dual generators for Gorenstein subalgebras and characterizes when the algebra is a complete intersection based on the polynomial.

## Key findings

- Explicit description of Macaulay dual generators for Gorenstein subalgebras
- Necessary and sufficient conditions for $A(F)$ to be a complete intersection when $n=d$
- Conditions on polynomial $F$ for algebraic properties of $A(F)$

## Abstract

Let $F$ be a homogeneous polynomial in $n$ variables of degree $d$ over a field $K$. Let $A(F)$ be the associated Artinian graded $K$-algebra. If $B \subset A(F)$ is a subalgebra of $A(F)$ which is Gorenstein with the same socle degree as $A(F)$, we describe the Macaulay dual generator for $B$ in terms of $F$. Furthermore when $n=d$, we give necessary and sufficient conditions on the polynomial $F$ for $A(F)$ to be a complete intersection.