Graphical t-designs with block sizes three and four

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Graphical t-designs with block sizes three and four

Chee, Y.M., Graphical t-designs with block sizes three and four, Discrete Mathematics 91 (1991) 201-206. All graphical t-designs with 2 G t < k G 4 are determined.

متن کامل

Uniform Group Divisible Designs with Block Sizes Three and n

The existence of group divisible designs of type gt with block sizes three and n, 4 n 10, is completely settled for all values of g and t.

متن کامل

Uniformly resolvable designs with index one and block sizes three and four - with three or five parallel classes of block size four

Each parallel class of a uniformly resolvable design (URD) contains blocks of only one block size. AURDwith v points andwith block sizes three and fourmeans that at least one parallel class has block size three and at least one has block size four. Danziger [P. Danziger, Uniform restricted resolvable designs with r = 3, ARS Combin. 46 (1997) 161–176] proved that for all v ≡ 12 (mod 24) there ex...

متن کامل

Halving block designs with block size four

B) is said to have the Size Four property if the blocks in B can be partitioned into two isomorphic sets. In this paper we construct block with four with the property, thus the exception of 6 A. Rosa [4]).

متن کامل

Pairwise balanced designs with block sizes 4 and 8

Let K be a set of positive integers. A pairwise balanced design (PBD) of index unity B(K,l;v) is a pair (X/~) where X is a v-set (of points) and B is a collection of subsets of X (called blocks) with sizes from K such that every pair of distinct points of X is contained in exactly one block of~. A necessary condition for the existence of a PBD B({4,8},I;v) is v-0 or l(mod 4). It is shown that t...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Discrete Mathematics

سال: 1991

ISSN: 0012-365X

DOI: 10.1016/0012-365x(91)90111-e