Completely regular codes with different parameters giving the same distance-regular coset graphs

Author

Rifà i Coma, Josep

Zinoviev, Victor

Publication date

2017

Abstract

We construct several classes of completely regular codes with different parameters, but identical intersection array. Given a prime power q and any two natural numbers a,b, we construct completely transitive codes over different fields with covering radius ρ=min{a,b}ρ=min{a,b} and identical intersection array, specifically, one code over F_q^r for each divisor r of a or b. As a corollary, for any prime power qq, we show that distance regular bilinear forms graphs can be obtained as coset graphs from several completely regular codes with different parameters.

Document Type

Article

Language

English

Subjects and keywords

Bilinear forms graph; Completely regular code; Completely transitive code; Coset graph; Distance-regular graph; Distance-transitive graph; Kronecker product construction; Lifting of a field; Uniformly packed code

Publisher

 

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Rights

open access

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