发布求助
文献互助 智能选刊 最新文献

Portugaliae Mathematica最新文献

筛选
英文 中文
A note on a bilevel problem for parameter learning for inverse problems with the wave equation 关于波动方程反问题参数学习的一个双层问题的注记
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2022-01-17 DOI: 10.4171/pm/2073
Wiebke Günther, A. Kröner
{"title":"A note on a bilevel problem for parameter learning for inverse problems with the wave equation","authors":"Wiebke Günther, A. Kröner","doi":"10.4171/pm/2073","DOIUrl":"https://doi.org/10.4171/pm/2073","url":null,"abstract":"","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42425157","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
Overdetermined ODEs and rigid periodic states in network dynamics 网络动力学中的超定ode和刚性周期态
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2021-12-31 DOI: 10.4171/pm/2080
Ian Stewart
{"title":"Overdetermined ODEs and rigid periodic states in network dynamics","authors":"Ian Stewart","doi":"10.4171/pm/2080","DOIUrl":"https://doi.org/10.4171/pm/2080","url":null,"abstract":"We consider four long-standing Rigidity Conjectures about synchrony and phase patterns for hyperbolic periodic orbits of admissible ODEs for networks. Proofs of stronger local versions of these conjectures, published in 2010-12, are now known to have a gap, but remain valid for a broad class of networks. Using different methods we prove local versions of the conjectures under a stronger condition, `strong hyperbolicity', which is related to a network analogue of the Kupka-Smale Theorem. Under this condition we also deduce global versions of the conjectures and an analogue of the $H/K$ Theorem in equivariant dynamics. We prove the Rigidity Conjectures for all 1- and 2-colourings and all 2- and 3-node networks by proving that strong hyperbolicity is generic in these cases.","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48151458","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: 1
On orbifold Gromov–Witten classes 在格罗莫夫-维特班上
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2021-12-31 DOI: 10.4171/pm/2090
Hsian-Hua Tseng
{"title":"On orbifold Gromov–Witten classes","authors":"Hsian-Hua Tseng","doi":"10.4171/pm/2090","DOIUrl":"https://doi.org/10.4171/pm/2090","url":null,"abstract":"ev : Kg,n(X , d) → ĪX , where ĪX is the rigidified inertia stack of X . See [3, Section 3] for a detailed discussion on inertia stacks and [3, Section 4.4] for the construction of evaluation maps. (2) Forgetting stable maps to X but only retaining the domain curves yields the forgetful map π : Kg,n(X , d) → M tw g,n, where M g,n is the stack of n-pointed genus g orbifold curves, see [19, Theorem 1.9]. Assuming 2g − 2 + n > 0, then passing to coarse curves and stablizing the domains yield another forgetful map p : Kg,n(X , d) → Mg,n, where Mg,n is the stack of n-pointed genus g stable curves. There is an obvious commutative diagram Kg,n(X , d)","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42099520","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
Filtrations of moduli spaces of tropical weighted stable curves 热带加权稳定曲线模空间的过滤
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2021-11-29 DOI: 10.4171/pm/2093
S. Serpente
{"title":"Filtrations of moduli spaces of tropical weighted stable curves","authors":"S. Serpente","doi":"10.4171/pm/2093","DOIUrl":"https://doi.org/10.4171/pm/2093","url":null,"abstract":"We study how changing the weight datum $mathcal{A}=(a_1,...,a_n)in(mathbb{Q}cap(0,1])^n$ affects the topology of tropical moduli spaces $M_{g,mathcal{A}}^{trop}$, $overline{M}_{g,mathcal{A}}^{trop}$ and $Delta_{g,mathcal{A}}$ and the homology of the latter one. We show that for fixed $g$ and $n$, there are particular filtrations of these topological spaces which we can use to compute the reduced rational homology of $Delta_{g,mathcal{A}}$ and the top weight cohomology of the moduli space $mathcal{M}_{g,mathcal{A}}$ of smooth $(g,mathcal{A})$-stable algebraic curves.","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41422930","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 the asymptotic behavior of solutions to a class of grand canonical master equations 关于一类大正则主方程解的渐近性态
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2021-11-19 DOI: 10.4171/pm/2102
Sabine Bogli, P. Vuillermot
{"title":"On the asymptotic behavior of solutions to a class of grand canonical master equations","authors":"Sabine Bogli, P. Vuillermot","doi":"10.4171/pm/2102","DOIUrl":"https://doi.org/10.4171/pm/2102","url":null,"abstract":"In this article we investigate the long time behavior of solutions to a class of infinitely many master equations defined from transition rates that are suitable for the description of a quantum system approaching thermodynamical equilibrium with a heat bath at fixed temperature and a reservoir consisting of one species of particles characterized by a fixed chemical potential. We do so by proving a result which pertains to the spectral resolution of the semigroup generated by the equations, whose infinitesimal generator is realized as a trace-class self-adjoint operator defined in a suitable weighted sequence space. This allows us to prove the existence of global solutions which all stabilize toward the grand canonical equilibrium probability distribution as the time variable becomes large, some of them doing so exponentially rapidly. When we set the chemical potential equal to zero, the stability statements continue to hold in the sense that all solutions converge toward the Gibbs probability distribution of the canonical ensemble which characterizes the equilibrium of the given system with a heat bath at fixed temperature.","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45557302","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: 1
Analysis of a bulk-surface thermistor model for large-area organic LEDs 大面积有机led体面热敏电阻模型分析
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2021-08-18 DOI: 10.4171/pm/2066
A. Glitzky, M. Liero, Grigor Nika
{"title":"Analysis of a bulk-surface thermistor model for large-area organic LEDs","authors":"A. Glitzky, M. Liero, Grigor Nika","doi":"10.4171/pm/2066","DOIUrl":"https://doi.org/10.4171/pm/2066","url":null,"abstract":"","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41541094","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: 2
Some surfaces with canonical map of degree 4 具有4次正则映射的一些曲面
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2021-07-16 DOI: 10.4171/pm/2106
Federico Fallucca, R. Pignatelli
{"title":"Some surfaces with canonical map of degree 4","authors":"Federico Fallucca, R. Pignatelli","doi":"10.4171/pm/2106","DOIUrl":"https://doi.org/10.4171/pm/2106","url":null,"abstract":"In this short note we construct unbounded families of minimal surfaces of general type with canonical map of degree 4 such that the limits of the slopes assume countably many different values among 6+2/3 and 8.","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45899525","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: 2
Stability conditions for reversible and partially integrable systems 可逆和部分可积系统的稳定性条件
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2021-06-02 DOI: 10.4171/PM/2060
C. Buzzi, Luci Roberto, M. Teixeira
{"title":"Stability conditions for reversible and partially integrable systems","authors":"C. Buzzi, Luci Roberto, M. Teixeira","doi":"10.4171/PM/2060","DOIUrl":"https://doi.org/10.4171/PM/2060","url":null,"abstract":"","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":"78 1","pages":"43-63"},"PeriodicalIF":0.8,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41740297","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: 2
A short proof of a theorem of Cotti, Dubrovin and Guzzetti Cotti、Dubrovin和Guzzetti定理的一个简短证明
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2021-03-31 DOI: 10.4171/PM/2077
C. Sabbah
{"title":"A short proof of a theorem of Cotti, Dubrovin and Guzzetti","authors":"C. Sabbah","doi":"10.4171/PM/2077","DOIUrl":"https://doi.org/10.4171/PM/2077","url":null,"abstract":". We give a short proof of a theorem of G.Cotti, B.Dubrovin and D.Guzzetti ([ CDG19 ] and [ Guz21 ]) asserting the vanishing of some entries of the Stokes matrices at coalescing points of an isomonodromic deformation.","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47154040","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: 2
On a free boundary model for three-dimensional MEMS with a hinged top plate: Stationary case 具有铰接顶板的三维MEMS的自由边界模型:固定情况
IF 0.8 4区 数学
Portugaliae Mathematica Pub Date : 2021-03-11 DOI: 10.4171/pm/2067
K. Nik
{"title":"On a free boundary model for three-dimensional MEMS with a hinged top plate: Stationary case","authors":"K. Nik","doi":"10.4171/pm/2067","DOIUrl":"https://doi.org/10.4171/pm/2067","url":null,"abstract":"A stationary free boundary problem modeling a three-dimensional electrostatic MEMS device is investigated. The device is made of a rigid ground plate and an elastic top plate which is hinged at its boundary, the plates being held at different voltages. The model couples a nonlocal fourth-order equation for the deformation of the top plate to a Laplace equation for the electrostatic potential in the free domain between the two plates. The strength of the coupling is tuned by a parameter λ which is proportional to the square of the applied voltage difference. Existence of a stable stationary solution is established for small values of λ. Nonexistence of stationary solutions is obtained when λ is large enough.","PeriodicalId":51269,"journal":{"name":"Portugaliae Mathematica","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47851700","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: 1
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信