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Sumner's conjecture

David Sumner (a graph theorist at the University of South Carolina) conjectured in 1971 that tournaments are universal graphs for polytrees. More… 
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Papers overview

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2015
2015
Salinized soils are soils with very low fertility because of physical and chemical negative attributes. They are used as meadows… 
2011
2011
Abstract Cicero‘s value as a military commentator has traditionally been obscured by his reputation as an unmilitary figure. This… 
2010
2010
. The Lichtenbaum-Quillen conjectures hold for the harmonic localization of the .^-theory spectrum of a nice scheme. Various… 
1997
1997
Evaluation des performances du syteme IRIS de recherche d'information dans le cadre TREC 6. Etude des reactions des utilisateurs… 
1996
1996
CORWAl (Reg. no. GP-434, P1 564850) hard red winter wheat (Triticum aestivum L.) germplasm was developed by the Colorado… 
1938
1938
President realizes need for consolidation of Foreign Services of Commerce and Agriculture into that of State Dept.; existing…