Characters and the equivalence of codes
Journal of Combinatorial Theory Series A
The relative generalized Hamming weight of linear q-ary codes and their subcodes
Designs, Codes and Cryptography
Secret sharing schemes from binary linear codes
Information Sciences: an International Journal
Geometric approach to higher weights
IEEE Transactions on Information Theory - Part 1
The weight hierarchies of q-ary codes of dimension 4
IEEE Transactions on Information Theory - Part 2
Some new characters on the wire-tap channel of type II
IEEE Transactions on Information Theory
Generalized Hamming weights for linear codes
IEEE Transactions on Information Theory
Further results on the semilinear equivalence of linear codes
Information Sciences: an International Journal
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Code equivalence is a basic concept in coding theory. The well-known theorem by MacWilliams gives a sufficient condition for code equivalence. Recently the MacWilliams theorem has been generalized, by Fan, Liu and Puig, making use of the generalized Hamming weights (GHWs). In this paper, we will present a further generalization of the MacWilliams theorem. Our result extends both the MacWilliams theorem and the result by Fan, Liu and Puig. We will first define ''relative subcodes'' of a linear code, based on the relative generalized Hamming weights (RGHWs) which is a generalization of the GHWs; and then establish a method based on finite projective geometry to characterize relative subcodes. Using this method, we will prove our main result.