共查询到20条相似文献,搜索用时 31 毫秒
1.
The Ramanujan Journal - The goal of the present paper is to show that all the zeros of the Eisenstein series for $$\Gamma _0^*(5)$$ and $$\Gamma _0^*(7)$$ on the standard fundamental domain lie on... 相似文献
2.
Periodica Mathematica Hungarica - In this paper we generalize the result (obtained by the author earlier in the paper titled “Products and coproducts in the category $${{\mathcal {S}}}(B)$$... 相似文献
3.
The Ramanujan Journal - This paper is a continuation of our previous works where we study maps from $$X_0(N)$$ , $$N\ge 1$$ , into $${\mathbb {P}}^2$$ constructed via modular forms of the same... 相似文献
4.
Abstract. T. Kato [9] found an important property of semi-Fredholm pencils,
now called the Kato decomposition. Few years later, M.A. Kaashoek [7]
introduced operators having the property
as a generalization of semi-Fredholm operators. In [4], it is proved that these two notions are linked. The
aim of this work is to study the stability of the property
under finite perturbation. 相似文献
5.
Periodica Mathematica Hungarica - In this paper, first we study surjective isometries (not necessarily linear) between completely regular subspaces A and B of $$C_0(X,E)$$ and $$C_0(Y,F)$$ where X... 相似文献
6.
Positivity - Let X and Y be locally compact Hausdorff spaces. In this paper we study surjections $$T: A \longrightarrow B$$ between certain subsets A and B of $$C_0(X)$$ and $$C_0(Y)$$ ,... 相似文献
7.
We study permanence properties of the classes of stable and so-called -stable -algebras, respectively. More precisely, we show that a (X)-algebra A is stable if all its fibres are, provided that the underlying compact metrizable space X has finite covering dimension or that the Cuntz semigroup of A is almost unperforated (a condition which is automatically satisfied for -algebras absorbing the Jiang–Su algebra tensorially). Furthermore, we prove that if is a K
1-injective strongly self-absorbing -algebra, then A absorbs tensorially if and only if all its fibres do, again provided that X is finite-dimensional. This latter statement generalizes results of Blanchard and Kirchberg. We also show that the condition
on the dimension of X cannot be dropped. Along the way, we obtain a useful characterization of when a -algebra with weakly unperforated Cuntz semigroup is stable, which allows us to show that stability passes to extensions of
-absorbing -algebras.
Research supported by: Deutsche Forschungsgemeinschaft (through the SFB 478), by the EU-Network Quantum Spaces - Noncommutative
Geometry (Contract No. HPRN-CT-2002-00280), and by the Center for Advanced Studies in Mathematics at Ben-Gurion University 相似文献
8.
Functional Analysis and Its Applications - We introduce a notion of averaged mappings in the broader class of $$\operatorname{CAT}(0)$$ spaces. We call these mappings $$\alpha$$ -firmly... 相似文献
9.
A contact-stationary Legendrian submanifold of is a Legendrian submanifold whose volume is stationary under contact deformations. The simplest contact-stationary Legendrian
submanifold (actually minimal Legendrian) is the real, equatorial n-sphere S
0. This paper develops a method for constructing contact-stationary (but not minimal) Legendrian submanifolds of by gluing together configurations of sufficiently many many U(n + 1)-rotated copies of S
0. Two examples of the construction, corresponding to finite cyclic subgroups of U(n + 1) are given. The resulting submanifolds
are very symmetric; are geometrically akin to a ‘necklace’ of copies of S
0 attached to each other by narrow necks and winding a large number of times around before closing up on themselves; and are topologically equivalent to . 相似文献
10.
The goal of this paper is to study the problem of finding a regular nonnegative Borel measure ? on a locally compact Hausdorff spaceS satisfying the conditions $$\int\limits_S {p_i d\varphi = \mu _i } for all i \in T \cup \{ 0\} , \mu _0 = 1, \varphi (S)< B$$ wherep i εC 0(S),T is an arbitrary set andBε(0, ∞]. We provide a number of equivalent conditions for the existence of a solution ? which generalize some known conditions for denumerableT and linearly independentp i . As an application we prove a negative result on Schauer's bases inC(S). 相似文献
11.
The Ramanujan Journal - We study the divisibility properties of the partition function associated with the eighth-order mock theta function $$V_0(q)$$ , introduced by Gordon and McIntosh. We obtain... 相似文献
12.
Constant mean curvature hypersurfaces in $${{\mathbb S}^{n+1}}$$ by gluing spherical building blocks
Adrian Butscher 《Mathematische Zeitschrift》2009,263(1):1-25
The techniques developed by Butscher (Gluing constructions amongst constant mean curvature hypersurfaces of ) for constructing constant mean curvature (CMC) hypersurfaces in by gluing together spherical building blocks are generalized to handle less symmetric initial configurations. The outcome
is that the approximately CMC hypersurface obtained by gluing the initial configuration together can be perturbed into an
exactly CMC hypersurface only when certain global geometric conditions are met. These balancing conditions are analogous to those that must be satisfied in the “classical” context of gluing constructions of CMC hypersurfaces in
Euclidean space, although they are more restrictive in the case. An example of an initial configuration is given which demonstrates this fact; and another example of an initial configuration
is given which possesses no symmetries at all. 相似文献
13.
Semigroup Forum - A countable semigroup is $$\aleph _0$$ -categorical if it can be characterised, up to isomorphism, by its first-order properties. In this paper we continue our investigation into... 相似文献
14.
Archiv der Mathematik - Consider the class of exponential polynomials of the form $$\begin{aligned} f(z)=\sum _{n=0}^{N}\left( \sum _{k=0}^{m_n}c_{n,k}z^k\right) e^{h_n z}, \qquad 0=h_0<... 相似文献
15.
Any continuous action of SL
, where n > 2, on a r-dimensional mod 2 homology sphere factors through a finite group action if r < n −1. In particular, any continuous action of SL
on the n-dimensional sphere factors through a finite group action.Mathematics Subject Classiffications (2000). Primary 57S25; Secondary 37C85, 57S17 相似文献
16.
Qian Jin Luo 《数学学报(英文版)》2020,36(6):711-722
Let B be the unit disc in R~2, H be the completion of C_0∞(B) under the norm■ .By the method of blow-up analysis and an argument of rearrangement with respect to the standard hyperbolic metric ■, we prove that, for any fixed■ ,the supremum■ .This is an analog of early results of Lu–Yang(Discrete Contin. Dyn. Syst., 2009) and Yang(Trans.Amer. Math. Soc., 2007), and extends those of Wang–Ye(Adv. Math., 2012) and Yang–Zhu(Ann.Global Anal. Geom., 2016). 相似文献
17.
Positivity - The result of the title is: an archimedean $$\ell $$ -group with weak unit A is (isomorphic to) $$C(\mathcal {L})$$ for some (identifiable) locale $$\mathcal {L}$$ (or, $$\mathbb... 相似文献
18.
Franki Dillen Johan Fastenakels Joeri Van der Veken 《Annals of Global Analysis and Geometry》2009,35(4):381-396
We show a way to choose nice coordinates on a surface in and use this to study minimal surfaces. We show that only open parts of cylinders over a geodesic in are both minimal and flat. We also show that the condition that the projection of the direction tangent to onto the tangent space of the surface is a principal direction, is equivalent to the condition that the surface is normally
flat in . We present classification theorems under the extra assumption of minimality or flatness.
J. Fastenakels is a research assistant of the Research Foundation—Flanders (FWO).
J. Van der Veken is a postdoctoral researcher supported by the Research Foundation—Flanders (FWO).
This work was partially supported by project G.0432.07 of the Research Foundation—Flanders (FWO). 相似文献
19.
We prove that any simply connected
-manifold of CR-codimension s 2 is noncompact by showing that the
complete, simply connected
-manifolds are all the CR products N × {s-1} with N Sasakian, endowed with a
suitable product metric. N is a Sasakian -symmetric space if and only if M is CR-symmetric. The locally CR-symmetric
-manifolds are characterized by
=0 where
is the Tanaka--Webster connection. This characterization is showed to be nonvalid for nonnormal almost
-manifolds.Mathematics Subject Classifications (2000). 53C25, 53C35, 32V05. 相似文献
20.
Designs, Codes and Cryptography - Let $${\mathbb {F}}_{\!q}$$ be a finite field and $$E_b\!: y^2 = x^3 + b$$ be an ordinary (i.e., non-supersingular) elliptic curve (of j-invariant 0) such that... 相似文献