Embedding a $\theta$-invariant code into a complete one
نویسندگان
چکیده
Let A be a finite or countable alphabet and let θ be a literal (anti)morphism onto A∗ (by definition, such a correspondence is determinated by a permutation of the alphabet). This paper deals with sets which are invariant under θ (θ-invariant for short). We establish a formula which allows to embed any non-complete θ-invariant code into a complete one: this brings a positive answer to the open question that was stated in [11].
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