Báo cáo toán học: "Existentially Closed BIBD Block-Intersection Graphs" pps

Báo cáo toán học: "Existentially Closed BIBD Block-Intersection Graphs" pps

Báo cáo toán học: "Existentially Closed BIBD Block-Intersection Graphs" pps

... n-e.c. block-intersection graphs are necessarily simple. Further, we determine all BIBD( v, 3, 2) which have 2-e.c. block-intersection graphs, noting that there are no BIBD( v, 3, 2) with n-e.c. block-intersection ... incomplete block designs (BIBDs) and when their block-intersection graphs are n-existentially closed. We characterise the BIBDs with block size k  3 and index λ = 1...

Ngày tải lên: 07/08/2014, 15:23

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Báo cáo toán học: "A closed formula for the number of convex permutominoes" pot

Báo cáo toán học: "A closed formula for the number of convex permutominoes" pot

... Sequences, http://www.research.att.com/∼njas/sequences/ the electronic journal of combinatorics 14 (2007), #R57 17 A closed formula for the number of convex permutominoes Filippo Disanto ∗ Andrea Frosini † Renzo Pinzani † Simone ... Published: Aug 20, 2007 Mathematical Subject Classification: 05A15 Abstract In this paper we determine a closed formula for the number of convex permu- tominoe...

Ngày tải lên: 07/08/2014, 15:22

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