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Revista De La Union Matematica Argentina最新文献

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On the zeros of univariate E-polynomials 关于一元E-多项式的零点
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2023-03-10 DOI: 10.33044/revuma.2305
María Laura Barbagallo, Gabriela Jeronimo, J. Sabia
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引用次数: 0
Positivities in Hall–Littlewood expansions and related plethystic operators 霍尔-利特尔伍德扩张和相关的多体运营商的积极性
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2023-03-10 DOI: 10.33044/revuma.2899
Marino Romero
{"title":"Positivities in Hall–Littlewood expansions and related plethystic operators","authors":"Marino Romero","doi":"10.33044/revuma.2899","DOIUrl":"https://doi.org/10.33044/revuma.2899","url":null,"abstract":"","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47159585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Normal form transformations for modulated deep-water gravity waves 调制深水重力波的范式变换
4区 数学
Revista De La Union Matematica Argentina Pub Date : 2023-02-27 DOI: 10.33044/revuma.2918
Philippe Guyenne, Adilbek Kairzhan, Catherine Sulem
{"title":"Normal form transformations for modulated deep-water gravity waves","authors":"Philippe Guyenne, Adilbek Kairzhan, Catherine Sulem","doi":"10.33044/revuma.2918","DOIUrl":"https://doi.org/10.33044/revuma.2918","url":null,"abstract":"","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":"37 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135892663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Conformal vector fields on statistical manifolds 统计流形上的共形向量场
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-09-12 DOI: 10.33044/revuma.2118
Leila Samereh, E. Peyghan
{"title":"Conformal vector fields on statistical manifolds","authors":"Leila Samereh, E. Peyghan","doi":"10.33044/revuma.2118","DOIUrl":"https://doi.org/10.33044/revuma.2118","url":null,"abstract":". Introducing the conformal vector fields on a statistical manifold, we present necessary and sufficient conditions for a vector field on a statistical manifold to be conformal. After presenting some examples, we classify the conformal vector fields on two famous statistical manifolds. Considering three statistical structures on the tangent bundle of a statistical manifold, we study the conditions under which the complete and horizontal lifts of a vector field can be conformal on these structures.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47417693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On conformally compact Einstein manifolds 关于保形紧致Einstein流形
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-08-25 DOI: 10.33044/revuma.3156
S. Chang, Yuxin Ge
{"title":"On conformally compact Einstein manifolds","authors":"S. Chang, Yuxin Ge","doi":"10.33044/revuma.3156","DOIUrl":"https://doi.org/10.33044/revuma.3156","url":null,"abstract":". We survey some of the recent developments in the study of the compactness and uniqueness problems for some classes of conformally compact Einstein manifolds.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42599343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Blow-up of positive-initial-energy solutions for nonlinearly damped semilinear wave equations 非线性阻尼双线性波动方程正初始能量解的爆破
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-08-03 DOI: 10.33044/revuma.2099
M. Kerker
{"title":"Blow-up of positive-initial-energy solutions for nonlinearly damped semilinear wave equations","authors":"M. Kerker","doi":"10.33044/revuma.2099","DOIUrl":"https://doi.org/10.33044/revuma.2099","url":null,"abstract":". We consider a class of semilinear wave equations with both strongly and nonlinear weakly damped terms, u tt − ∆ u − ω ∆ u t + µ | u t | m − 2 u t = | u | p − 2 u, associated with initial and Dirichlet boundary conditions. Under certain con- ditions, we show that any solution with arbitrarily high positive initial energy blows up in finite time if m < p . Furthermore, we obtain a lower bound for the blow-up time.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41958926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wave maps into the sphere 波浪贴图到球体
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-07-20 DOI: 10.33044/revuma.3159
C. Kenig
{"title":"Wave maps into the sphere","authors":"C. Kenig","doi":"10.33044/revuma.3159","DOIUrl":"https://doi.org/10.33044/revuma.3159","url":null,"abstract":"In this note we discuss some geometric analogs of the classical harmonic functions on Rn and their associated evolutions. Harmonic functions are ubiquitous in mathematics, with applications arising in complex analysis, potential theory, electrostatics, and heat conduction. A harmonic function u in R solves the Laplace equation ∆u = 0 in a domain Ω, where ∆ = ∑n j=1 ∂ 2 xj . The well-known Dirichlet principle says that harmonic functions are critical points of the Dirichlet energy 1 2 ∫ Ω |∇u| 2. The associated evolutions are the heat equation ∂tu − ∆u = 0 and the wave equation ∂2 t u − ∆u = 0. The geometric analogs we will be discussing (which also have applications in physics) are harmonic maps: functions u : R → M , where M is a Riemannian manifold. Introduced in the early 1960s by Eells and Sampson [15], they are also critical points of the Dirichlet energy. The resulting Euler–Lagrange equation is a nonlinear PDE, because of the nonlinear constraint that u(x) ∈M . When M = S2 with the round metric, the equation becomes ∆u = −|∇u|2u. The point of introducing harmonic maps was to use them as a tool to study the geometric and topological properties of the manifold M . For instance, Eells and Sampson showed, using the associated heat flow (the harmonic map heat flow), that smooth functions from R to M can be deformed (under certain geometric conditions on M) into harmonic maps. This work inspired Hamilton [20] to introduce his Ricci flow, which eventually led to the proof of the Poincaré conjecture by Perelman [28]. The study of the singularities of these flows led to the notion of bubbling in singularity formation. It turns out that the bubbling phenomenon is universal, and is analogous to the soliton resolution which we will be considering later. We now turn to wave maps, the wave flow associated with harmonic maps. The topic is vast, and I will concentrate only on aspects close to my interests. There are several ways to define wave maps u : R×R →M . A formal one is to consider the Lagrangian","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47116582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Clemens–Schmid type exact sequence over a local basis 局部基上的Clemens-Schmid型精确序列
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-06-28 DOI: 10.33044/revuma.2163
Genaro Hernandez-Mada
{"title":"A Clemens–Schmid type exact sequence over a local basis","authors":"Genaro Hernandez-Mada","doi":"10.33044/revuma.2163","DOIUrl":"https://doi.org/10.33044/revuma.2163","url":null,"abstract":". Let k be a finite field of characteristic p and let X → Spec k [[ t ]] be a semistable family of varieties over k . We prove that there exists a Clemens– Schmid type exact sequence for this family. We do this by constructing a larger family defined over a smooth curve and using a Clemens–Schmid exact sequence in characteristic p for this new family.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48184404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New uncertainty principles for the $(k,a)$-generalized wavelet transform $（k，a）$广义小波变换的新不确定性原理
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-06-26 DOI: 10.33044/revuma.2051
H. Mejjaoli
{"title":"New uncertainty principles for the $(k,a)$-generalized wavelet transform","authors":"H. Mejjaoli","doi":"10.33044/revuma.2051","DOIUrl":"https://doi.org/10.33044/revuma.2051","url":null,"abstract":". We present the basic ( k,a )-generalized wavelet theory and prove several Heisenberg-type inequalities for this transform. After reviewing Pitt’s and Beckner’s inequalities for the ( k,a )-generalized Fourier transform, we connect both inequalities to show a generalization of uncertainty principles for the ( k,a )-generalized wavelet transform. We also present two concentration uncertainty principles, namely the Benedicks–Amrein–Berthier’s uncertainty principle and local uncertainty principles. Finally, we connect these inequalities to show a generalization of the uncertainty principle of Heisenberg type and we prove the Faris–Price uncertainty principle for the ( k,a )-generalized wavelet transform.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45108437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Trees with a unique maximum independent set and their linear properties 具有唯一极大独立集的树及其线性性质
IF 0.5 4区 数学
Revista De La Union Matematica Argentina Pub Date : 2022-06-08 DOI: 10.33044/revuma.1145
D. Jaume, Gonzalo Molina, Rodrigo Sota
{"title":"Trees with a unique maximum independent set and their linear properties","authors":"D. Jaume, Gonzalo Molina, Rodrigo Sota","doi":"10.33044/revuma.1145","DOIUrl":"https://doi.org/10.33044/revuma.1145","url":null,"abstract":"Trees with a unique maximum independent set encode the maximum matching structure in every tree. In this work we study some of their linear properties and give two graph operations, stellare and S-coalescence, which allow building all trees with a unique maximum independent set. The null space structure of any tree can be understood in terms of these graph operations.","PeriodicalId":54469,"journal":{"name":"Revista De La Union Matematica Argentina","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46546140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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