Báo cáo toán học: "Tilings by translation: enumeration by a rational language approach" pdf

... that CP2 is able to activate the transcription of transferrin. The transferrin proximal promoter contains a CP2- response element To determine the responding element for the CP2- med- iated expression ... 2 Oct-1 p53 CP2 AP-4 p300 CP2 CP2 p53 CP2 AP-2 +1 Fig. 1. Highly conserved regions of the transferrin promoter containing putative CP2 binding motifs. (A)...

Ngày tải lên: 23/03/2014, 03:20

... retinoic acid involves a novel mechanism of inhibition of transactivation function of the nuclear factors of activated T-cells Mi-Ock Lee 1, *, Hyo-Jin Kang 1, *, Young Mi Kim 1 , Ji-Hyun Oum 2 and ... have not been elucidated. Nuclear factors of activated T-cells (NFAT) is a family of related transcription factors that play a c entral rol...

Ngày tải lên: 24/03/2014, 03:21

... Orthopaedic Surgery and Research Open Access Research article Finger joint motion generated by individual extrinsic muscles: A cadaveric study Ashish D Nimbarte, Rodrigo Kaz and Zong-Ming Li* Address: ... finger maneuvers. Natural finger flexion and extension is achieved by line- arly coupled motion among the metacarpophalangeal (MCP), proximal interphalangeal (PI...

Ngày tải lên: 20/06/2014, 01:20

... Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. Anti-inflammatory new coumarin from the Ammi majus ... the aerial parts of the Egyptian medicinal plant Ammi majus L. led to isolation of new coumarin, 6-hydroxy-7-methoxy-10 4 methyl coumarin (2) and 6-hydrox...

Ngày tải lên: 20/06/2014, 20:20

... other hand, mathgames have their own special combinatorial appeal, of a somewhat different flavor. They appeal to and are created by mathe- maticians of various disciplines, who find special intellectual ... 193–204. 575. A. S. Fraenkel, U. Tassa and Y. Yesha [1978], Three annihilation games, Math. Mag. 51, 13–17, special issue on Recreational Math. 576. A. S. Fraenkel and Y. Yesha [1976], T...

Ngày tải lên: 07/08/2014, 05:23

... the class of all 4-chromatic graphs. The structure of the red graph is obvious by Corollary, but we do not know which graphs can occur as blue graphs and what are the properties of graphs in which ... on the Wall, a list of conjectures of Graffiti. Ramseyan Properties of Graphs by Ermelinda DeLaVina delavina@math.uh.edu Siemion Fajtlowicz siemion@math.uh.edu Uni...

Ngày tải lên: 07/08/2014, 06:20

... PSP of pseudo-square polyominoes which are also paral lelogram. By using the Beauquier- Nivat characterization we provide by means of a rational language the enumeration of the subclass of psp-polyominoes ... electr onic journal of combinatorics 13 (2006), #R15 18 Tilings by translation: enumeration by a rational language approach Srecko Brlek ∗ , Andrea Frosini † ,...

Ngày tải lên: 07/08/2014, 13:21

... [3], these tile the sphere uniquely up to reflection. 6 Conclusion This paper lists all the right spherical triangles with asymptotically right V 1 that tile the sphere. The set of such triangles ... gives us Figure 29c; but there is no way to the electronic journal of combinatorics 13 (2006), #R48 27 Tilings of the sphere with right triangles I: Th...

Ngày tải lên: 07/08/2014, 13:21

... 27 ◦ )andvertexvectors(0, 2, 8), (0, 5, 0), (1, 0, 10), (1, 3, 2), (2, 1, 4), and (4, 0, 0). Its area is 1/80 that of the sphere. Theorem 2 The triangle T 8 does not tile the sphere. Proof: As before, we examine the ... now find the vertex vectors (a, b, c) of the triangles T n . Proposition 1 The vertex vectors of T n are precisely (0, 2 ,n),...

Ngày tải lên: 07/08/2014, 13:21

... divide that of the sphere. Proposition 5 The only right triangles with V 1 = (1, 2, 1) that tile the sphere are the (90 ◦ , 90 ◦ , 90 ◦ ) and (90 ◦ , 108 ◦ , 54 ◦ ) triangles. Proof: The triangles ... right triangles I: the asymptotically right families, Electronic Journal of Combinatorics 13(1) (2006) #R48 [5] Dawson, R. J. MacG. and Doyle, B., Tilings...

Ngày tải lên: 07/08/2014, 15:22

... is the purpose of the present work to fill this gap, and in the course of doing so, we obtain the involution analogues of the corresponding results on permutations. The point of departure of this ... des σ and maj σ denote respectively the number of fixed points, the number of transpositions, the number of descents, and the major index, of σ, on the class...

Ngày tải lên: 07/08/2014, 21:20

... a hook length expansion technique and explain how to discover old and new hook length formulas for partitions and plane trees. The new hook length formulas for trees obtained by our method can be ... Classical hook length formulas for partitions. Đ3. Hook length expansion algorithm and HookExp. Đ4. The exponent principle. Đ5. Hook length formulas for pa...

Ngày tải lên: 07/08/2014, 21:21

... Since no x 3 , x 4 are the electronic journal of combinatorics 16 (2009), #N21 3 Higher Chain Formula proved by Combinatorics Tsoy-Wo Ma ∗ School of Mathematics and Statistics, University of Western ... p k ! p k1 +ÃÃÃ+p k y i x p k1 Ã Ã Ã x p k m ki . (6.1) 7. We shall prove this formula by interpretation rather than by formal argument. L et us examine the special case when...

Ngày tải lên: 07/08/2014, 21:21

... Lemma 1 For convenience we shall assume that the set B is independent. Also, we shall call a pat h with both ends in A an A- path. Claim 6 If G contains an A- path of order p > 2, then G contains ... Nikifor ov, The spectral radius of graphs without paths and cycles of specified length, to appear in Linear Algebra Appl. Preprint available at arXiv:0903.535 [6] J. Verstraăete,...

Ngày tải lên: 08/08/2014, 01:20

... nonsimple critical positions. Keywords: Theory of formal languages; Combinatorics on words; Number The- ory; Partial words; Bordered partial words; Simple border; Simply bordered partial words; Critical ... v is unbordered and is generated by a partial word u, then u is unbordered as well. Hence, every unbordered word over a k-letter alphabet with h holes c an be generat...

Ngày tải lên: 08/08/2014, 14:23