Báo cáo toán học: "Meet and Join within the Lattice of Set Partitions" doc

... replacement of n by n − 1andofr by r − r/(1 + r)n +O(n −2 ), is the formula stated as Theorem 3. the electronic journal of combinatorics 8 (2001), #R15 6 Meet and Join within the Lattice of Set Partitions E. ... ,x it ). The various x ij are themselves partitions of a set S i ⊆ [n]; the join (over j)ofthex ij equals {S i } ;and = {S i :1≤ i ≤ } is a partition...

Ngày tải lên: 07/08/2014, 06:22

... amide groups of Ile128 and Arg129. Despite these differences in the coordination of the res- idues in the tip, the fold of the loop is strikingly simi- lar. The rmsd for the Ca atoms of the residues ... conformation of the enzyme exists where the CP domain, by binding tightly to the catalytic domain, increases the rigidity of the complex between the e...

Ngày tải lên: 06/03/2014, 22:21

... ; and thus, we get a contradiction at 15.  Finally, let us also consider the subgraph ˙ G × + of G × + defined as follows: The vertex -set of ˙ G × + is again the set of positive integers, and ... with the help of Prolog. Proposition 4.1. χ  G × +  ≥ 4. Proof. Let G 10 be the subgraph of G × + induced by the 10 vertices 6, 7, 8, 9, 12, 13, 14, 15, 20, and 36:...

Ngày tải lên: 07/08/2014, 08:20

... temperature, the mixture was acidified with diluted hydrochloric acid (1:3), and the precipitate was filtered and recrystallized from DMF and water. A mixture of the acids 3a–k and 4a–c (1 mmol), and ... is the primary cause of facial lesions (mouth, lips, and eyes) in humans. The widespread use of acyclovir and nucleoside analogues has led to emergence of...

Ngày tải lên: 20/06/2014, 20:20

Ngày tải lên: 05/08/2014, 15:20

... (b),B(b)). The subset B(b) is the set of values which are barred in b and the subset P (b) is the set of their positions in b. Recalling from subsection 1.1 the definition of the descent statistic for the ... NC B n and pairs of equal-size subsets of [n], the elements of L(π)andR(π) indicate the Left and Right delimiters of the non-zero blocks. Hence...

Ngày tải lên: 07/08/2014, 06:20

... independent set of data. The models were then compared with data of years 1991 and 1992. Optical properties of the needles The spectral reflectance and transmittance of the needles ... vanishes. RESULTS Optical properties of the needles Figure 2 displays the spectral reflectance and transmittance of the needles (3 years altogether)....

Ngày tải lên: 08/08/2014, 19:21

... summarizes recent progress in the understanding of how osmosensing and osmosignaling integrate into the overall context of growth factor signaling and the execution of apoptotic programs. Abbreviations EGF, ... involved in the regulation of metabolism, gene expression and the susceptibility to different kinds of stress [6]. For example, the inhibi- tion of autoph...

Ngày tải lên: 18/02/2014, 16:20

... [1,14]. The lack of hydroxylation of vitamin D3 at position 22 now provides a clear explanation for the inability of P450scc to cleave the side chain of vitamin D3. Hydroxylation of the side chain of ... with the collection and interpretation of the NMR data. Their spectra were recorded in CDCl 3 and COSY spectra lacked fine detail. HSQC and expanded COSY were n...

Ngày tải lên: 18/02/2014, 17:20

... The paper will focus on the lexicon component of the word raging system, the UCREL grammar, the datal~zlks of parsed sentences, and the tools that have been written to support developmem of ... derived fnxn the tagged Brown corpus (F-nmcis and gu~em. 1982). Some cells of this matrix were inaccurate because of incompmilz'lity of the Brown tagset and...

Ngày tải lên: 08/03/2014, 18:20