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Optimal $(r,δ)$-LRCs from monomial-Cartesian codes and their subfield-subcodes
Carlos Galindo, Fernando Hernando, Helena Martín-Cruz · 2022-05-03 · via cs.IT updates on arXiv.org

We study monomial-Cartesian codes (MCCs) which can be regarded as $(r,δ)$-locally recoverable codes (LRCs). These codes come with a natural bound for their minimum distance and we determine those giving rise to $(r,δ)$-optimal LRCs for that distance, which are in fact $(r,δ)$-optimal. A large subfamily of MCCs admits subfield-subcodes with the same parameters of certain optimal MCCs but over smaller supporting fields. This fact allows us to determine infinitely many sets of new $(r,δ)$-optimal LRCs and their parameters.

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