Armario Sampalo, José AndrésBailera, IvánEgan, Ronan2021-06-282021-06-282020Armario Sampalo, J.A., Bailera, I. y Egan, R. (2020). Butson full propelinear codes. ArXiv.org, arXiv:2010.06206https://hdl.handle.net/11441/114900In this paper we study Butson Hadamard matrices, and codes over finite rings coming from these matrices in logarithmic form, called BH-codes. We introduce a new morphism of Butson Hadamard matrices through a generalized Gray map on the matrices in logarithmic form, which is comparable to the morphism given in a recent note of Ó Catháin and Swartz. That is, we show how, if given a Butson Hadamard matrix over the kth roots of unity, we can construct a larger Butson matrix over the ℓth roots of unity for any ℓ dividing k, provided that any prime p dividing k also divides ℓ. We prove that a Zps -additive code with p a prime number is isomorphic as a group to a BH-code over Zps and the image of this BH-code under the Gray map is a BH-code over Zp (binary Hadamard code for p = 2). Further, we investigate the inherent propelinear structure of these codes (and their images) when the Butson matrix is cocyclic. Some structural properties of these codes are studied and examples are provided.application/pdf24engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/CocyclesButson Hadamard matricesGray mappropelinear codesinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccesshttps://doi.org/DOI: 10.1007/s10623-022-01110-7