Báo cáo toán học: "Ear decompositions in combed graphs" pps

... t). A join pair (G, t) is a join covered pair if each edge of G lies in a minimum t-join. Note that if T is a t-join in a join pair (G, t) and C is a circuit with more than half its edges in T , ... circuit containing P also contains all the other ears of X, including Q. By the inductive hypothesis, H has a comb T  H , equivalent to T ∩ EH, that has a balanced circuit containing e and...

Ngày tải lên: 07/08/2014, 15:23

... bound follows by applying the Stirling approximation formula for factorials. It is worth noting that since every -regular graph with density d and 2n vertices contains, in each color class, at ... bound in Theorem 1 apply this estimate to the matrix A =(a u,v ) u∈V 1 ,v∈V 2 in which a u,v =1if u, v are adjacent and a u,v = 0 otherwise. Here M(G)=per(A). Since the function x! 1/x is inc...

Ngày tải lên: 07/08/2014, 06:22

... matching (or one-factor) of G is a subgraph of G in which each vertex has degree at most one. A basic question in combinatorial optimization is, “What is the size of a maximum matching in a given ... The set of incidence vectors of the matchings of G have a convex hull which is equal to the polytope containing all x ∈ R E which satisfy the following the electronic journal of combinatori...

Ngày tải lên: 07/08/2014, 13:21

... surfaces. Interdiscip. Inf. Sci., 12(2):93–107, 2006. the electronic journal of combinatorics 15 (2008), #N11 5 Lattice points in Minkowski sums Christian Haase, Benjamin Nill, Andreas Paffenholz ∗ Institut ... a (closed) strip R of lattice width one. The interior of R intersects precisely two edges of Q, since the strip contains no lattice point in its interior. Those two are the only edg...

Ngày tải lên: 07/08/2014, 15:23

... four-face fall into the same class, then there is a chain of ’opposite’ vertices connecting them. Arguing with such a chain enclosing a minimum number of faces leads to a contradiction. Finally, show ... Every vertex v has one outgoing edge in each label. The edges e 1 ,e 2 ,e 3 leaving v in labels 1,2,3 occur in clockwise order. Each edge entering v in label i enters v in the clock...

Ngày tải lên: 07/08/2014, 08:20

... giving instructions. T23 felt that a persistence in doing routine activities in Chinese might result in teacher-fronted lessons in which individual students might only be speaking and practicing ... Shih-Chang Hsin. 2011. The development of TCSL teacher training in Taiwan . In Teaching and learning Chinese in global contexts, eds. Linda Tsung and Ken Cruickshank, 165-180. Co...

Ngày tải lên: 20/06/2014, 21:20

... 2007) incorporate boolean rules into constraint-based models for integrated simu- lation of regulatory and metabolic networks. Integrated FBA (iFBA) extends rFBA by integrating kinetic information ... Something from nothing – bridging the gap between constraint-based and kinetic modelling. FEBS J 274(21):5576–5585 Smallbone K, Simeonidis E, Swainston N, Mendes P (2010) Towards a genome-scale...

Ngày tải lên: 20/06/2014, 21:20

Ngày tải lên: 05/08/2014, 09:46

Ngày tải lên: 05/08/2014, 10:20

Ngày tải lên: 05/08/2014, 15:20