搜索结果: 1-15 共查到“理学 generalizations”相关记录29条 . 查询时间(0.078 秒)
We prove the Noether-Lefschetz conjecture on the moduli space of quasi-polarized K3 surfaces. This is deduced as a particular case of a general theorem that states that low degree cohomology classes o...
PARTIAL GENERALIZATIONS OF SOME CONJECTURES IN LOCALLY SYMMETRIC LORENTZ SPACES
PARTIAL GENERALIZATIONS CONJECTURES SYMMETRIC LORENTZ SPACES
2018/4/19
Abstract. In this paper, first we give a notion for linear Weingarten spacelike hypersurfaces with P + aH = b in a locally symmetric Lorentz space Ln+11 . Furthermore, we study complete or compact lin...
Species tree inference by the STAR method, and generalizations
Species tree inference STAR method generalizations Populations and Evolution
2012/5/2
The multispecies coalescent model describes the generation of gene trees from a rooted metric species tree, and thus provides a framework for the inference of species trees from sampled gene trees. We...
Generalizations on Rabinowitz’s Theorems
Second order Hamiltonian systems Periodic solutions Saddle Point Theorems
2011/10/18
We use the famous Benci-Rabinowitz’s Saddle Point Theorem ([3])with Cerami-Palais-Smale condition to study the existence of new periodic solutions with a fixed period for second order Hamiltonian syst...
Krausz dimension and its generalizations in special graph classes
Krausz dimension intersection graphs linear k-uniform hypergraphs chordal graphs polar graphs
2011/9/14
Abstract: A {\it krausz $(k,m)$-partition} of a graph $G$ is the partition of $G$ into cliques, such that any vertex belongs to at most $k$ cliques and any two cliques have at most $m$ vertices in com...
Agoh's conjecture: its proof, its generalizations, its analogues
Agoh's conjecture its generalizations its analogues Number Theory
2011/9/9
Abstract: In this paper we formulate some generalizations of Agoh's conjecture. We provide a proof of one of them. We also formulate conjectures involving congruence modulo primes about hyperbolic sec...
Topological algebras of rapidly decreasing matrices and generalizations
Rapidly decreasing matrix weighted matrix algebra continuous inverse algebra
2011/2/21
It is a folklore fact that the rapidly decreasing matrices of countable size form an associative topological algebra whose set of quasi-invertible elements is open, and such that the quasi-inversion m...
Beta Spaces: New Generalizations of Typically-Metric Properties
Beta Spaces Typically-Metric Properties
2010/11/23
It is well-known that point-set topology (without additional structure) lacks the capacity to generalize the analytic concepts of completeness, boundedness, and other typically-metric properties. The...
Nekrasov-Okounkov identity gives a product representation of the sum over partitions of a certain function of partition hook length. In this paper we give several generalizations of the Nekrasov-Okoun...
k-wise Erdős-Ko-Rado Theorems: Stability Analysis and New Generalizations
intersection theorems stability matchings
2010/12/9
We consider the following generalization of the seminal Erdős-Ko-Rado theorem, due to Frankl [6]. For some k ≥ 2, let F be a k-wise intersecting family of r-subsets of an n element set X, i.e. fo...
Two-component generalizations of the periodic Camassa-Holm and Degasperis-Procesi equations
Camassa–Holm equation Degasperis–Procesi equation semidirect product geodesic flow
2010/11/26
We use geometric methods to study two natural two-component generalizations of the periodic Camassa–Holm and Degasperis–Procesi equations.
Multi-component generalizations of the {CH} equation: Geometrical Aspects, Peakons and Numerical Examples
Multi-component generalizations {CH} equation Geometrical Aspects Peakons Numerical Examples
2010/12/16
The Lax pair formulation of the two-component Camassa-Holm equation (CH2) is generalized to produce an integrable multi-component family, CH(n,k), of equations with n components and 1 jkj n veloci...
Commutativity degree, its generalizations, and classification of finite groups
Commutativity degree generalizations classification of finite groups
2010/12/14
Classification of finite groups is a central problem in theory of groups.Even though finite abelian groups have been completely classified, a lot still remains to be done as far as non-abelian groups ...
Generalizations of the Wedderburn number: Parameterizing upwelling in stratified lakes
the Wedderburn number Parameterizing upwelling in stratified lakes
2014/4/17
The effect of lake geometry on wind-induced upwelling, in a two-layer stratified lake with a variable bottom slope and generic planar shape is investigated. (1) The traditional linearized classificati...
Non-Hamiltonian generalizations of the dispersionless 2DTL hierarchy
Non-Hamiltonian dispersionless 2DTL hierarchy
2010/4/2
We consider two-component integrable generalizations of the dispersionless 2DTL hierarchy connected with non-Hamiltonian vector fields, similar to the Manakov-Santini hierarchy generalizing the dKP hi...