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排序方式: 共有72条查询结果,搜索用时 0 毫秒
1.
2.
A simple transformation of the eight-carbon side chain of a natural spirostan sapogenin into the cephalostatin north 1 spiroketal moiety is described. This methodology, based on an intramolecular hydrogen abstraction reaction promoted by alkoxy radicals, permits the synthesis of C-22 and C-25 stereoisomers of the dioxaspiro[4.4]nonane cephalostatin ring system. The acid-catalyzed isomerization of the spirocenter in the different isomers is studied. [reaction: see text] 相似文献
3.
In this paper we study the Hankel convolution operators on the space of even and entire functions and on Schwartz distribution spaces. We characterize the Hankel convolution operators as those ones that commute with Hankel translations and with a Bessel operator. Also we prove that the Hankel convolution operators are hypercyclic and chaotic on the spaces under consideration. 相似文献
4.
J. J. Betancor A. J. Castro J. Curbelo 《Journal of Fourier Analysis and Applications》2011,17(5):932-975
In this paper we prove L
p
-boundedness properties of spectral multipliers associated with multidimensional Bessel operators. In order to do this we
estimate the L
p
-norm of the imaginary powers of Bessel operators. We also prove that the Hankel multipliers of Laplace transform type on
(0,∞)
n
are principal value integral operators of weak type (1,1). 相似文献
5.
In this paper we define the Kμ- transformation on certain spaces of generalized functions introduced by A.C. McBride by employing the kernel method. we also establish relations between the generalized Kμ- transformation and certain fractional integral operators. 相似文献
6.
7.
In this paper we introduce and study the anisotropic local Hardy spaces
hAp(\mathbbRn)h_{A}^{p}(\mathbb{R}^{n}) 0<p≤1, associated with the expansive matrix A. We obtain an atomic characterization of the distributions in
hAp(\mathbbRn)h_{A}^{p}(\mathbb{R}^{n}). Also we describe the dual spaces of our local Hardy anisotropic spaces as anisotropic Campanato type spaces. 相似文献
8.
Jorge J. Betancor Alejandro J. Castro Jezabel Curbelo Lourdes Rodríguez-Mesa 《Complex Analysis and Operator Theory》2013,7(4):1019-1048
In this paper we characterize the Banach spaces with the UMD property by means of L p -boundedness properties for the imaginary powers of the Hermite and Laguerre operators. In order to do this we need to obtain pointwise representations for the Laplace transform type multipliers associated with Hermite and Laguerre operators. 相似文献
9.
In this paper we consider the space ${{{BMO}_o(\mathbb{R}, X)}}$ of bounded mean oscillations and odd functions on ${{\mathbb{R}}}$ taking values in a UMD Banach space X. The functions in ${{{BMO}_o(\mathbb{R}, X)}}$ are characterized by Carleson type conditions involving Bessel convolutions and γ-radonifying norms. Also we prove that the UMD Banach spaces are the unique Banach spaces for which certain γ-radonifying Carleson inequalities for Bessel–Poisson integrals of ${{{BMO}_o(\mathbb{R}, X)}}$ functions hold. 相似文献
10.
Jorge J. Betancor Claudio Jerez Sandra M. Molina Lourdes Rodríguez-Mesa 《Monatshefte für Mathematik》2008,153(2):89-103
In this paper we study the Hankel transformation and convolution on certain spaces
of entire functions and its dual
that is a space of hyperfunctions and contains the (even)-Schwartz space S
e
′. We prove that the Hankel transform is an automorphism of
. Also the Hankel convolutors of
are investigated.
Authors’ addresses: Jorge J. Betancor, Claudio Jerez and Lourdes Rodríguez-Mesa, Departamento de Análisis Matemático, Universidad
de la Laguna, Campus de Anchieta, Avda. Astrofísico Francisco Sánchez, s/n, 38271 La Laguna (Sta. Cruz de Tenerife), Espa?a;
Sandra M. Molina, Departamento de Matemáticas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata,
Funes 3350 (7600), Mar del Plata, Argentina 相似文献