A comparison of the Delsarte and Lovász bounds

A comparison of the Delsarte and Lovász bounds
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DOI:
10.1109/tit.1979.1056072
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发表时间:
1979-07
期刊:
IEEE Trans. Inf. Theory
影响因子:
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通讯作者:
A. Schrijver
A. Schrijver
中科院分区:
其他
文献类型:
--
作者:
A. Schrijver

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将Delsarte的线性编程结合(在关联方案中的基数的上限上的上限)与Lov \急性{a} Sz的\ theta功能结合(在图形的香农容量上的上限)进行了比较。这两个边界可以以统一的方式对待。 Delsarte的线性编程绑定可以推广到任意图G的独立性编号\ propto(g)上的界限\ theta \ prime(g),因此\ theta \ prime(g)\ leq \ leq \ theta(g)。另一方面,如果g的边集是对称关联方案的类别的结合,则可以通过线性编程来计算\ theta(g),对于此类图,则可以通过线性编程来计算。 \ theta(g)等于g的顶点数量。
Delsarte's linear programming bound (an upper bound on the cardinality of cliques in association schemes) is compared with Lov\acute{a}sz's \theta -function bound (an upper bound on the Shannon capacity of a graph). The two bounds can be treated in a uniform fashion. Delsarte's linear programming bound can be generalized to a bound \theta \prime(G) on the independence number \propto(G) of an arbitrary graph G , such that \theta \prime(G) \leq \theta(G) . On the other hand, if the edge set of G is a union of classes of a symmetric association scheme, \theta(G) may be calculated by linear programming, For such graphs the product \theta(G) . \theta(G) is equal to the number of vertices of G .