Duality and decoding of linearized Algebraic Geometry codes

Elena Berardini; Xavier Caruso; Fabrice Drain

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arXiv · 2603.11826

Duality and decoding of linearized Algebraic Geometry codes

Elena Berardini·Xavier Caruso·Fabrice Drain

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Abstract

We design a polynomial time decoding algorithm for linearized Algebraic Geometry codes with unramified evaluation places, a family of sum-rank metric evaluation codes on division algebras over function fields. By establishing a Serre duality and a Riemann-Roch theorem for these algebras, we prove that the dual codes of such linearized Algebraic Geometry codes, that we term linearized Differential codes, coincide with the linearized Algebraic Geometry codes themselves over the adjoint algebra, and that our decoding algorithm is correct.

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Elena Berardini, Xavier Caruso, Fabrice Drain. 2026-03-12. Duality and decoding of linearized Algebraic Geometry codes. https://arxiv.org/abs/2603.11826

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