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Paper   IPM / M / 145
School of Mathematics
  Title:   On trades: an update
  Author(s): 
1.  G. B. Khosrovshahi
2.  H. R. Maimani
3.  R. Torabi
  Status:   Published
  Journal: Discrete Appl. Math.
  Vol.:  95
  Year:  1999
  Pages:   361-376
  Supported by:  IPM
  Abstract:
A pair of disjoint collections of k-subsetes of a v-set X, {T1,T2}, is called a t-(v,k) trade if every t-subset of X appears precisely the same number of times in T1 as in T2. The purpose of this paper is to discuss the structures and properties of these combinatorial objects, review some of their applications, and present an update on the subject.


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