Existence of asymptotically good cyclic codes
Determine whether there exists an infinite family of cyclic codes over a fixed finite field that is asymptotically good; specifically, prove or disprove the existence of cyclic codes with both rate and relative minimum distance bounded away from zero as the blocklength tends to infinity.
References
It is a long-standing open problem that if there exists an infinite family of asymptoti- cally good cyclic codes, see [18].
— Cyclic and Negacyclic Codes with Optimal and Best Known Minimum Distances
(2401.06184 - Chen et al., 11 Jan 2024) in Section 1.2 (Related works)