Results 131 to 140 of about 2,701,787 (159)
Structural interactions of fibroblast growth factor receptor with its ligands. [PDF]
Proc Natl Acad Sci U S A, 2000 Stauber DJ +2 more
europepmc +1 more source
Minor lesion mutational spectrum of the entire NF1 gene does not explain its high mutability but points to a functional domain upstream of the GAP-related domain. [PDF]
Am J Hum Genet, 2000 Fahsold R +12 more
europepmc +1 more source
Quasisymmetric divided differences
54 pages, 17 figuresWe develop a quasisymmetric analogue of the combinatorial theory of Schubert polynomials and the associated divided difference operators. Our counterparts are "forest polynomials", and a new family of linear operators, whose theory of
Nadeau, Philippe +2 more
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A matroid-friendly basis for the quasisymmetric functions [PDF]
Journal of Combinatorial Theory - Series A, 2008 A new Z-basis for the space of quasisymmetric functions (QSym, for short) is presented. It is shown to have nonnegative structure constants, and several interesting properties relative to the quasisymmetric functions associated to matroids by the Hopf ...
Luoto, Kurt W.
exaly +5 more sources
Skew row-strict quasisymmetric Schur functions [PDF]
Journal of Algebraic Combinatorics, 2015 Mason and Remmel introduced a basis for quasisymmetric functions known as the row-strict quasisymmetric Schur functions. This basis is generated combinatorially by fillings of composition diagrams that are analogous to the row-strict tableaux that ...
Elizabeth Niese
exaly +1 more source
On weak peak quasisymmetric functions [PDF]
Journal of Combinatorial Theory - Series A, 2018 In this paper, we construct the weak version of peak quasisymmetric functions inside the Hopf algebra of weak composition quasisymmetric functions (WCQSym) defined by Guo, Thibon and Yu. Weak peak quasisymmetric functions (WPQSym) are studied in several aspects. First we find a natural basis of WPQSym lifting Stembridge's peak functions.
Yunnan Li
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Generalized Riffle Shuffles and Quasisymmetric Functions
Annals of Combinatorics, 2001 19 pages: minor corrections and the omission of some material that has appeared in more general form ...
Richard P Stanley
exaly +4 more sources
Order quasisymmetric functions distinguish rooted trees [PDF]
Journal of Algebraic Combinatorics, 2017 Richard P. Stanley conjectured that finite trees can be distinguished by their chromatic symmetric functions. In this paper, we prove an analogous statement for posets: Finite rooted trees can be distinguished by their order quasisymmetric ...
Shuhei Tsujie
exaly +2 more sources
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Distortion estimates for quasisymmetric functions
1983In their fundamental paper of 1956 Beurling and Ahlfors discovered that homeomorphisms \(f: {\mathbb{R}}\to {\mathbb{R}}\) satisfying \[ (1)\quad (1/K)\leq (f(x+t)-f(x))/(f(x)-f(x-t))\leq K,\quad \forall x\in {\mathbb{R}},\quad \forall t\in {\mathbb{R}}\setminus \{0\} \] characterize the boundary values of quasiconformal homeomorphisms of \(H=\{(x,y ...
Hayman, W. K., Hinkkanen, Aimo
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An estimate of the integral of quasisymmetric functions
1987It is a well-known fact that an orientation preserving homeomorphism of the real axis onto itself, \(f: {\mathbb{R}}\to {\mathbb{R}}\), is a boundary correspondence of a quasiconformal mapping of the upper half-plane onto itself if and only if f is a quasisymmetric function, namely, f satisfies the following condition \[ \rho^{-1} \leq \frac{f(x+t)-f(x)
Partyka, Dariusz +1 more
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