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Delsarte showed that for any projective linear code over a finite field GF(pr) with two nonzero Hamming weights w1<w2 there exist positive integers u and s such that w1=psu and w2=ps(u+1). Moreover, he showed that the additive group of such a code has a strongly regular Cayley graph. Here we show that for any regular projective linear code C over a finite Frobenius ring with two integral nonzero...
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