搜索结果: 61-75 共查到“数学 POINTS”相关记录146条 . 查询时间(0.078 秒)
Unsolved Problems in Visibility Graphs of Points, Segments and Polygons
Unsolved Problems Visibility Graphs of Points Segments Polygons
2011/3/3
In this survey paper, we present open problems and conjectures on visibility graphs of points, segments and polygons along with necessary backgrounds for understanding them.
On the flatness of Riemannian cylinders without conjugate points
flatness of Riemannian cylinders conjugate points
2011/1/17
What are appropriate geometric conditions ensuring that every complete Riemannian 2-cylinder without conjugate points is at?Examples with nonpositive curvature show that one has to assume that the end...
Foliations on the moduli space of rank two connections on the projective line minus four points
Painlev´ e VI Representation Fundamental group Logarithmic connection
2011/2/21
We look at natural foliations on the Painlev´e VI moduli space of regular connections of rank 2 on P1−{t1, t2, t3, t4}. These foliations are fibrations,and are interpreted in terms of the ...
Random groups have fixed points on CAT(0) cube complexes
Random groups fixed points on CAT(0) cube complexes
2011/2/22
We prove that a random group has fixed points when it isometrically acts on a CAT(0) cube complex. We do not assume that the action is simplicial.
Fixed points subgroups $G^{\sigma,\sigma'}$ by two involutive automorphisms $\sigma$, $\sigma'$ of exceptional compact Lie group $G$, Part II, $G = E_8$
Exceptional Lie group Symmetric space
2011/2/21
For the simply connected compact exceptional Lie group E8, we determine the structure of subgroup (E8).
Fixed points subgroups by two involutive automorphisms $\sigma, \gamma$ of compact exceptional Lie groups $F_4, E_6$ and $E_7$
Fixed points subgroups by two involutive automorphisms $\sigma \gamma$ of compact exceptional Lie groups $F_4, E_6$ $E_7$
2011/2/21
For simply connected compact exceptional Lie groups G = F4,E6 and E7, we consider two involutions σ, γ and determine the group structure of subgroups G,of G which are the intersection G ∩ G of the ...
Points rationnels sur les quotients d'Atkin-Lehner de courbes de Shimura de discriminant $pq$
Points rationnels quotients d’Atkin-Lehner
2011/2/21
Let p and q be two distinct prime numbers, and Xpq/wq be the quotient of the Shimura curve of discriminant pq by the Atkin-Lehner involution wq. We describe a way to verify in wide generality a criter...
Sur les variétés X dans P^N telles que par n points passe une courbe de X de degré donné
Sur les variétés X dans P^N telles que par n passe une courbe
2011/2/21
1.1. Les classes Xr+1,n(q). — On consid`ere un probl`eme de g´eom´etrie projective com-
plexe, auquel nous ont conduits nos travaux r´ecents sur l’alg´ebrisation des tissus de...
At which points exactly has Lebesgue's singular function the derivative zero ?
Takagi’s function Lebesgue’s singular function Nowhere-differentiable function
2011/2/28
Let La(x) be Lebesgue’s singular function with a real parameter a (0 < a < 1, a 6= 1/2). As is well known, La(x) is strictly increasing and has a derivative equal to zero almost everywhere.
On the Convex Hull of the Points on Modular Hyperbolas
congruence modular hyperbola integral polygon convex hull
2011/1/19
Given integers a and m ≥ 2, let Ha(m) be the following set of integral points Ha(m) = {(x, y) : xy ≡ a (mod m), 1 ≤ x, y ≤ m − 1} We improve several previously known upper bounds on va(m), the n...
Exchange between perverse and weight filtration for the Hilbert schemes of points of two surfaces
Exchange perverse weight filtration Hilbert schemes points of two surfaces
2011/1/21
We show that a natural isomorphism between the rational cohomology groups of the two zero-dimensional Hilbert schemes of n-points of two surfaces, the affine plane minus the axes and the cotangent bun...
Quadrature rules and distribution of points on manifolds
Quadrature discrepancy harmonic analysis
2011/2/28
We study the error in quadrature rules on a compact manifold, XN j=1 !jf (zj) − Z
M f(x)dx ≤ cD {zj} V {f} .
Properties of harmonic meromorphic functions which are starlike of complex order with respect to conjugate points
harmonic meromorphic
2010/11/1
This paper defines and investigates a class of meromorphic univalent harmonic functions that are starlike of complex order with respect to conjugate points. The authors obtain convolution and convex c...
On eigenvalues of differential equations with singularities, discontinuity conditions and turning points
eigenvalues of differential equations singularities turning points
2010/9/20
We consider the Sturm-Liouville equation on the bounded interval with two singularities in end points. This equation contains one turning point together with discontinuity conditions, moreover the tur...
A modified Mann iteration process for common fixed points of an infinite family of nonexpansive mappings in Banach spaces
Nonexpansive mappings Strong and weak convergence
2010/9/25
A modified Mann iteration process for common fixed points of an infinite family of nonexpansive mappings in Banach spaces.