English

Reconstruction of hypermatrices from subhypermatrices

Combinatorics 2024-01-09 v1

Abstract

For a given nn, what is the smallest number kk such that every sequence of length nn is determined by the multiset of all its kk-subsequences? This is called the kk-deck problem for sequence reconstruction, and has been generalized to the two-dimensional case -- reconstruction of n×nn\times n-matrices from submatrices. Previous works show that the smallest kk is at most O(n12)O(n^\frac{1}{2}) for sequences and at most O(n23)O(n^\frac{2}{3}) for matrices. We study this kk-deck problem for general dimension dd and prove that, the smallest kk is at most O(ndd+1)O(n^\frac{d}{d+1}) for reconstructing a dd dimensional hypermatrix of order nn from the multiset of all its subhypermatrices of order kk.

Keywords

Cite

@article{arxiv.2401.03906,
  title  = {Reconstruction of hypermatrices from subhypermatrices},
  author = {Xiande Zhang and Wenjie Zhong},
  journal= {arXiv preprint arXiv:2401.03906},
  year   = {2024}
}

Comments

25 pages, 4 figures

R2 v1 2026-06-28T14:11:14.053Z