AUTHOR(S): Katie Brodhead, Malarie Cummings, Cora Seidler

TITLE Primary Decomposition of Ideals Arising from Hankel Matrices 
ABSTRACT Hankel matrices have many applications in various fields ranging from engineering to computer science. Their internal structure gives them many special properties. In this paper we focus on the structure of the set of polynomials generated by the minors of generalized Hankel matrices whose entries consist of indeterminates with coefficients from a field k. A generalized Hankel matrix M has in its jth codiagonal constant multiples of a single variable Xj. Consider now the ideal ๐ผ" ๐ in the polynomial ring k[X1, ... , Xm+n1] generated by all (r ร r)minors of M. An important structural feature of the ideal ๐ผ" ๐ is its primary decomposition into an intersection of primary ideals. This decomposition is analogous to the decomposition of a positive integer into a product of prime powers. Just like factorization of integers into primes, the primary decomposition of an ideal is very difficult to compute in general. Recent studies have described the structure of the primary decomposition of ๐ผ$ ๐ . However, the case when r > 2 is substantially more complicated. We will present an analysis of the primary decomposition of ๐ผ% ๐ for generalized Hankel matrices up to size 5 ร 5. 
KEYWORDS Hankel, matrix, decomposition, ideal, Grรถbner, basis, prime, primary, SINGULAR, polynomial, ring, minor, coefficient, Noetherian, field, commutative, algebra, irredundant, radical, factorization, component, algebraic, geometry, generator, normal, isolated, embedded 
REFERENCES [1] D. Cox, J. Little, & D. O'Shea, Ideals, Varieties and Algorithms, 2nd Ed., SpringerVerlag, New York, 1997. 
Cite this paper Katie Brodhead, Malarie Cummings, Cora Seidler. (2017) Primary Decomposition of Ideals Arising from Hankel Matrices. International Journal of Mathematical and Computational Methods, 2, 372381 
