DM
2011
13 years 10 months ago
2011
Fix an element x of a finite partially ordered set P on n elements. Then let hi(x) be the number of linear extensions of P in which x is in position i, counting from the bottom. T...
AMC
2008
14 years 3 months ago
2008
In the article, the noted Darboux's formula of functions with single variable is generalized to that of functions of two independent variables with integral remainder, some im...
EDBT
2010
ACM
14 years 10 months ago
2010
ACM
Implementations of map-reduce are being used to perform many operations on very large data. We examine strategies for joining several relations in the map-reduce environment. Our ...