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Nonsingular hypercubes and nonintersecting hyperboloids

Kris Coolsaet (UGent)
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Abstract
Some ten years ago we managed to take a first step in the classification of nonsingular 2x2x2x2 hypercubes over a finite field by resolving the special case where the hypercubes can be written as a product of two 2x2x2 hypercubes, i.e., nonsingular 2x2x2x2 hypercubes of 12-rank two. We have now been able to extend this classification to hypercubes of 12-rank three, based on the connection between nonsingular hypercubes and bundles of nonintersecting quadrics in 3 dimensions. A bit surprisingly, the number of inequivalent non-singular hypercubes of 12-rank three is only of the same order of magnitude as in the case of 12-rank two. We also made some headway into the remaining case of 12-rank four. In particular, we prove that there are essentially only 2 nonsingular 2x2x2x2 hypercubes that correspond to a hyperbolic fibration of 3-dimensional projective space.
Keywords
Nonsingular hypercube, Classification, Bundle of quadrics, Hyperbolic fibration

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Citation

Please use this url to cite or link to this publication:

MLA
Coolsaet, Kris. “Nonsingular Hypercubes and Nonintersecting Hyperboloids.” DESIGNS CODES AND CRYPTOGRAPHY, vol. 92, 2023, pp. 93–112, doi:10.1007/s10623-023-01297-3.
APA
Coolsaet, K. (2023). Nonsingular hypercubes and nonintersecting hyperboloids. DESIGNS CODES AND CRYPTOGRAPHY, 92, 93–112. https://doi.org/10.1007/s10623-023-01297-3
Chicago author-date
Coolsaet, Kris. 2023. “Nonsingular Hypercubes and Nonintersecting Hyperboloids.” DESIGNS CODES AND CRYPTOGRAPHY 92: 93–112. https://doi.org/10.1007/s10623-023-01297-3.
Chicago author-date (all authors)
Coolsaet, Kris. 2023. “Nonsingular Hypercubes and Nonintersecting Hyperboloids.” DESIGNS CODES AND CRYPTOGRAPHY 92: 93–112. doi:10.1007/s10623-023-01297-3.
Vancouver
1.
Coolsaet K. Nonsingular hypercubes and nonintersecting hyperboloids. DESIGNS CODES AND CRYPTOGRAPHY. 2023;92:93–112.
IEEE
[1]
K. Coolsaet, “Nonsingular hypercubes and nonintersecting hyperboloids,” DESIGNS CODES AND CRYPTOGRAPHY, vol. 92, pp. 93–112, 2023.
@article{01HM8PHAM1FF1NYQHS5HDRCE0R,
  abstract     = {{Some ten years ago we managed to take a first step in the classification of nonsingular 2x2x2x2 hypercubes over a finite field by resolving the special case where the hypercubes can be written as a product of two 2x2x2 hypercubes, i.e., nonsingular 2x2x2x2 hypercubes of 12-rank two. We have now been able to extend this classification to hypercubes of 12-rank three, based on the connection between nonsingular hypercubes and bundles of nonintersecting quadrics in 3 dimensions. A bit surprisingly, the number of inequivalent non-singular hypercubes of 12-rank three is only of the same order of magnitude as in the case of 12-rank two. We also made some headway into the remaining case of 12-rank four. In particular, we prove that there are essentially only 2 nonsingular 2x2x2x2 hypercubes that correspond to a hyperbolic fibration of 3-dimensional projective space.}},
  author       = {{Coolsaet, Kris}},
  issn         = {{0925-1022}},
  journal      = {{DESIGNS CODES AND CRYPTOGRAPHY}},
  keywords     = {{Nonsingular hypercube,Classification,Bundle of quadrics,Hyperbolic fibration}},
  language     = {{eng}},
  pages        = {{93--112}},
  title        = {{Nonsingular hypercubes and nonintersecting hyperboloids}},
  url          = {{http://doi.org/10.1007/s10623-023-01297-3}},
  volume       = {{92}},
  year         = {{2023}},
}

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