Báo cáo toán học: "Small maximal sum-free sets" pdf

Báo cáo toán học: "Evolutionary Families of Sets" potx

Báo cáo toán học: "Evolutionary Families of Sets" potx

... E appears as late as possible. Then the set R of elements of S appearing before E constitutes a maximal connected subfamily of S−{E}. Certainly R is backward evolutionary. Since S is forward evolutionary, ... follows that R has a dendritic ancestor, C. Since S, being backward evolutionary, is connected but R is a maximal connected sub- family of S−{E}, it follows that  R∩E = ∅. (Suppose...

Ngày tải lên: 07/08/2014, 06:20

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Báo cáo toán học: "Small Forbidden Configurations II" pptx

Báo cáo toán học: "Small Forbidden Configurations II" pptx

... the vertices i n,1 ,i n,2 , i n,k n in turn (note that by the two maximal property for P n that k n > 1). Extend P n to a two -maximal path i n+1,1 → →i n+1,e n+1 →i n,k n → →i n,l n .Thiswe relabel ... the choice of k n ,wehavei n,s →j and using two-maximality we get that i n,s+1 →j, i n,s+2 →j, ,i n,l n →j and the final arc contradicts the two-maximality of P n . We obtain a new exact...

Ngày tải lên: 07/08/2014, 06:22

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