๐”– Bobbio Scriptorium
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Symmetric designs and related configurations

โœ Scribed by H.J Ryser

Publisher
Elsevier Science
Year
1972
Tongue
English
Weight
539 KB
Volume
12
Category
Article
ISSN
0097-3165

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๐Ÿ“œ SIMILAR VOLUMES

Construction of symmetric PBIB designs a
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## UCGOII Consider a fir iite module M with exactly u find k different elements x1, x2, . . . , xk out of following conditions. elements. Suppose it is possible to the u ele:men:s of 34 satisfying the (i) Among tht: k(k -I) differences 4 -x1, rf t, r; t = 1, 2,. . . , k, just ni of the non-zero el

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obtain a new for the of a -(u, A) design the block intersection st, sZ, . . , s, satisfy sr -sZ-. . . = s, = s(mod 2). This condition eliminates quasi-symmetric 2 -(20,10,18) and 2 -(60,30,58) designs. Quasi-symmetric 2 -(20,8,14) designs are eliminated by an ad hoc coding theoretic argument. A 2 -