# Hierarchical Zonotopal Spaces

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Suppose is an matrix. Let denote the hyperplane generated by a submatrix , with and denote by the set of all . The normal to a hyperplane is denoted by ; let . Then the central and the external ideals are generated by and , respectively. The semi-external ideal is generated by , where . The kernel of the central and external ideals are zonotopal spaces, while the kernel of the semi-external ideal is a hierarchical zonotopal space. This Demonstration shows the Hilbert series and Gröbner basis of the semi-external ideal .

Contributed by: Zhiqiang Xu (March 2011)

Open content licensed under CC BY-NC-SA

## Snapshots

## Details

O. Holtz, A. Ron, and Z. Xu, "Hierarchical Zonotopal Spaces," arXiv, 2009.

## Permanent Citation

"Hierarchical Zonotopal Spaces"

http://demonstrations.wolfram.com/HierarchicalZonotopalSpaces/

Wolfram Demonstrations Project

Published: March 7 2011