2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/159338Sixteen new linear codes are presented: three of them improve the lower bounds on the minimum distance for a linear code and the rest are an explicit construction of unknown codes attaining the lower bounds on the minimum distance. They are constructed using the Plotkin sum of two linear codes, also called $(u|u+v)$ construction. The computations have been achieved using an exhaustiv search.Submitted to IEEE Trans. Information TheoryInformation Theorytext