نتایج جستجو برای: 23 permutation

تعداد نتایج: 202534  

Journal: :Journal of Symbolic Computation 1998

Journal: :Journal of Pure and Applied Algebra 1998

2017
Jae Hyun Jung Gwan Gyu Song Jae-Hoon Kim Young Ho Seo Sung Jae Choi

BACKGROUND Uveitis is an eye inflammatory disease, which is sometimes associated with underlying systemic disease. Interleukin-23 plays an important role in autoimmune disease. The aim of this meta-analysis was to evaluate the association between the interleukin-23 receptor (IL-23R) and susceptibility to uveitis. METHODS Published literature from PUBMED and EMBASE were retrieved. Seven studie...

Journal: :Electr. J. Comb. 1998
Miklós Bóna

We determine all permutation classes defined by pattern avoidance which are equinumerous to the class of permutations whose Schubert variety is smooth. We also provide a lattice path interpretation for the numbers of such permutations.

Journal: :Australasian J. Combinatorics 2007
Michael H. Albert Robert E. L. Aldred Mike D. Atkinson Hans van Ditmarsch Chris C. Handley Derek A. Holton D. J. McCaughan C. W. Monteith

The cyclic closure of a permutation pattern class is defined as the set of all the cyclic rotations of its permutations. Examples of finitely based classes whose cyclic closure is also finitely based are given, as well as an example where the cyclic closure is not finitely based. Some enumerations of cyclic closures are computed.

Journal: :Electr. J. Comb. 2011
Paul Duncan Einar Steingrímsson

Ascent sequences are sequences of nonnegative integers with restrictions on the size of each letter, depending on the number of ascents preceding it in the sequence. Ascent sequences have recently been related to (2+2)-free posets and various other combinatorial structures. We study pattern avoidance in ascent sequences, giving several results for patterns of lengths up to 4, for Wilf equivalen...

Journal: :Cell 2004
Randy Schekman Peter Novick

George Palade's pioneering work in the 1960s had established the secretory pathway and its connection to the biogenesis of organelles as a major theme in eukary-otic cell biology (Palade, 1975). His disciples, including David Sabatini and Gunter Blobel, extended Palade's morphological approaches to the next level of analysis, involving subcellular fractionation and biochemical re-constitution t...

Journal: :bulletin of the iranian mathematical society 0
a. l. prins department of‎ ‎mathematics‎, ‎faculty of military science, stellenbosch‎ university‎‎, ‎private bag x2, saldanha‎, ‎7395‎, ‎south africa.

the full automorphism group of $u_6(2)$ is a group of the form $u_6(2){:}s_3$. the group $u_6(2){:}s_3$ has a maximal subgroup $2^9{:}(l_3(4){:}s_3)$ of order 61931520. in the present paper, we determine the fischer-clifford matrices (which are not known yet) and hence compute the character table of the split extension $2^9{:}(l_3(4){:}s_3)$.

2009
EINAR STEINGRÍMSSON

A permutation τ contains another permutation σ as a pattern if τ has a subsequence whose elements are in the same order with respect to size as the elements in σ. This defines a partial order on the set of all permutations, and gives a graded poset P. We give a large class of pairs of permutations whose intervals in P have Möbius function 0. Also, we give a solution to the problem when σ occurs...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید