全文获取类型
收费全文 | 4465篇 |
免费 | 251篇 |
国内免费 | 445篇 |
专业分类
化学 | 52篇 |
力学 | 141篇 |
综合类 | 30篇 |
数学 | 3983篇 |
物理学 | 955篇 |
出版年
2024年 | 10篇 |
2023年 | 46篇 |
2022年 | 44篇 |
2021年 | 64篇 |
2020年 | 105篇 |
2019年 | 131篇 |
2018年 | 139篇 |
2017年 | 151篇 |
2016年 | 83篇 |
2015年 | 88篇 |
2014年 | 146篇 |
2013年 | 816篇 |
2012年 | 116篇 |
2011年 | 178篇 |
2010年 | 190篇 |
2009年 | 253篇 |
2008年 | 346篇 |
2007年 | 281篇 |
2006年 | 236篇 |
2005年 | 217篇 |
2004年 | 218篇 |
2003年 | 203篇 |
2002年 | 201篇 |
2001年 | 139篇 |
2000年 | 164篇 |
1999年 | 126篇 |
1998年 | 143篇 |
1997年 | 107篇 |
1996年 | 48篇 |
1995年 | 32篇 |
1994年 | 24篇 |
1993年 | 24篇 |
1992年 | 20篇 |
1991年 | 7篇 |
1990年 | 7篇 |
1989年 | 8篇 |
1988年 | 7篇 |
1987年 | 5篇 |
1986年 | 5篇 |
1985年 | 11篇 |
1984年 | 5篇 |
1983年 | 4篇 |
1982年 | 2篇 |
1980年 | 3篇 |
1979年 | 2篇 |
1977年 | 1篇 |
1974年 | 2篇 |
1959年 | 1篇 |
1936年 | 2篇 |
排序方式: 共有5161条查询结果,搜索用时 46 毫秒
31.
Mathematical Notes - 相似文献
32.
We characterize Poisson and Jacobi structures by means of complete lifts of the corresponding tensors: the lifts have to be
related to canonical structures by morphisms of corresponding vector bundles. Similar results hold for generalized Poisson
and Jacobi structures (canonical structures) associated with Lie algebroids and Jacobi algebroids. 相似文献
33.
34.
代数$A$ 称为不可分解的,如果 $A$ 不能分解成理想的直和.文中将证明满足$C(L_{\bar{0}})=C(L)=\{0\}$的限制李超代数能够分解成不可分解限制理想的直和,这种分解在不计理想次序的前提下是唯一的.而且还证明了限制李超代数的一些结果. 相似文献
35.
Dmitry Tamarkin 《Geometric And Functional Analysis》2007,17(2):537-604
We give a proof of the Etingof–Kazhdan theorem on quantization of Lie bialgebras based on the formality of the chain operad
of little disks and show that the Grothendieck–Teichmüller group acts non-trivially on the corresponding quantization functors.
Partially supported by an NSF Grant and A. Sloan Research Fellowship
Received: November 2004 Revision: April 2006 Accepted: May 2006 相似文献
36.
We carry out a careful study of operator algebras associated with Delone dynamical systems. A von Neumann algebra is defined using noncommutative integration theory. Features of these algebras and the operators they contain are discussed. We restrict our attention to a certain C
*-subalgebra to discuss a Shubin trace formula. 相似文献
37.
We consider two classes of integrable nonlinear hyperbolic systems on Lie algebras. These systems generalize the principal chiral model. Each system is related to a pair of compatible Lie brackets and has a Lax representation, which is determined by the direct sum decomposition of the Lie algebra of Laurent series into the subalgebra of Taylor series and the complementary subalgebra corresponding to the pair. New examples of compatible Lie brackets are given. 相似文献
38.
We study a boundary version of the gauged WZW model with a Poisson–Lie group G as the target. The Poisson–Lie structure of G is used to define the Wess–Zumino term of the action on surfaces with boundary. We clarify the relation of the model to the topological Poisson sigma model with the dual Poisson–Lie group G
* as the target and show that the phase space of the theory on a strip is essentially the Heisenberg double of G introduced by Semenov–Tian–Shansky. 相似文献
39.
Derived Brackets 总被引:3,自引:1,他引:2
Yvette Kosmann-Schwarzbach 《Letters in Mathematical Physics》2004,69(1-3):61-87
We survey the many instances of derived bracket construction in differential geometry, Lie algebroid and Courant algebroid theories, and their properties. We recall and compare the constructions of Buttin and of Vinogradov, and we prove that the Vinogradov bracket is the skew-symmetrization of a derived bracket. Odd (resp., even) Poisson brackets on supermanifolds are derived brackets of canonical even (resp., odd) Poisson brackets on their cotangent bundle (resp., parity-reversed cotangent bundle). Lie algebras have analogous properties, and the theory of Lie algebroids unifies the results valid for manifolds on the one hand, and for Lie algebras on the other. We outline the role of derived brackets in the theory of Poisson structures with background'. 相似文献
40.
Philip Sternberg 《Journal of Combinatorial Theory, Series A》2007,114(5):809-824
Let g be a Lie algebra all of whose regular subalgebras of rank 2 are type A1×A1, A2, or C2, and let B be a crystal graph corresponding to a representation of g. We explicitly describe the local structure of B, confirming a conjecture of Stembridge. 相似文献