Abstract
Two new infinite series of imprimitive 5-class association schemes are constructed. The first series of schemes arises from forming, in a special manner, two edge-disjoint copies of the coset graph of a binary Kasami code (double error-correcting BCH code). The second series of schemes is formally dual to the first. The construction applies vector space duality to obtain a fission scheme of a subscheme of the Cameron-Seidel 3-class scheme of linked symmetric designs derived from Kerdock sets and quadratic forms over GF(2).
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Caen, D.d., Dam, E.R.v. Association Schemes Related to Kasami Codes and Kerdock Sets. Designs, Codes and Cryptography 18, 89–102 (1999). https://doi.org/10.1023/A:1008385102731
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DOI: https://doi.org/10.1023/A:1008385102731