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Some (17q, 17, 2) and (25q, 25, 3) BIBD Constructions
Authors:Marco Buratti
Affiliation:(1) Dipartimento di Ingegneria Elettrica, Universita' de L'Aquila, 67040 Poggio di Roio (Aq), Italy
Abstract:
We give the explicit construction of a regular (17q, 17, 2)-BIBD for any prime power q equiv 17 (mod 32) such that 2 is not a 4th power in GF(q) and the explicit construction of a regular (25q, 25, 3)-BIBD for any prime power q equiv 25 (mod 48) such that 
$$sqrt 3$$
and 
$$sqrt 3$$
+3 are non-squares in GF(q).
Keywords:regular balanced incomplete block design  relative difference family
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