Báo cáo toán học: "Integral Closures of Monomial Ideals and Fulkersonian Hypergraphs" ppsx

... is Fulkersonian if and only if Δ ∗ is Fulkersonian. We shall see that Fulkersonian hypergraphs can be used to study the integral closures of powers of monomial ideals. Let I be an arbitrary monomial ... of the denominators of l 1 , , l r and the components of b.Then pc = kpl 1 a 1 + ···+ kpl r a r + kpb Vietnam Journal of Mathematics 34:4 (2006) 489–494 Integral...

Ngày tải lên: 06/08/2014, 05:20

... edges of G. In fact, there is a somewhat more direct relationship between the edges of G and the Alexander dual of ∆(G). the electronic journal of combinatorics 16(2) (2009), #R3 10 Proof. By ... = {P i } of convex polytopes P i (called cells or faces of C) in some Euclidean space, with each face of P i also lying in C, and the intersection P i ∩ P j forming a face of both...

Ngày tải lên: 08/08/2014, 01:20

Ngày tải lên: 20/06/2014, 21:20

... reached in the event of an average weekly consumption (median value) of, e.g. 1,795 g of chocolate and for children 772 g of chocolate. On the basis of the maximum aluminium content of chocolate, ... a weekly consumption of 467 g and for children of only 201 g. To reach the PTWI value of 70 mg per week (adults) and of 30 mg per week (children), the weekly consump...

Ngày tải lên: 20/06/2014, 21:20

Ngày tải lên: 05/08/2014, 15:20

Ngày tải lên: 05/08/2014, 15:20

Ngày tải lên: 05/08/2014, 15:20

... oscillation of some object on half-line. The controlling cost at each step is unbounded and is defined by conditional expectation of the cost caused by the number of jumps and of the integral of the ... sequence of the exponentially distributed independent ran- dom variables with the parameter μ n+1 (μ n+1 > 0), and ν μ n+1 (ξ n+1 ) is random variable defined by The Model...

Ngày tải lên: 06/08/2014, 05:20

... anti- symmetric analog of Capelli’s identity, that is stated without proof at the end of Turnbull’s paper [T]. Now to take the symmetry of P and X into account the definition of a link has to be ... the permanent of a matrix A, and the matrix prod- uct X t P that appears on the right side of TUR  is taken with the assump- tion that the x i,j and p i,j commute. Since the proo...

Ngày tải lên: 07/08/2014, 06:20

... applications of these polynomials, deriving new bounds for the radius of a graph and the “weight k-excess” of a vertex. Generalizing these results, and grouping ideas of Van Dam [10] , and Garriga and ... presence of high levels of structure in the considered graphs. See, for instance, the papers of Haemers and Van Dam, [12] , and Garriga, Yebra, and the author [17...

Ngày tải lên: 07/08/2014, 06:20