- 摘要
2010年即将到来,恭祝大家新年快乐!在新的一年里万事顺利, 身体健康!
汤涛 香港浸会大学数学系
许学军 中国科学院数学与系统科学研究院
Editors of CAM-Digest
- 摘要
过去三十年相关领域的数学家一致期望Langlands Program中的一个基本引理会被证明的确是精确的。
Ngo Bao Chau一位在法国Université Paris-Sud 和普林斯顿Institute for Advanced Study (IAS) 工作的越南数学家(1972年生于越南河内),证明了这一引理,2009年相关领域的数学家验证了他的证明。这一结果被《时代》杂志列为2009年度十大科学发现的第七项。
The Fundamental Lemma, Solved
In 1979 the Canadian-American mathematician Robert Langlands developed an ambitious and revolutionary theory that connected two branches of mathematics called number theory and group theory. In a dazzling set of conjectures and insights, the theory captured deep symmetries associated with equations that involve whole numbers, laying out what is now known as the Langlands program. Langlands knew that the task of proving the assumptions that underlie his theory would be the work of generations. But he was convinced that one stepping stone that needed confirmation — dubbed the "fundamental lemma" — would be reasonably straightforward. He, his — collaborators and his students were able to prove special cases of this fundamental theorem. But proving the general case proved more difficult than Langlands anticipated — so difficult, in fact, that it took 30 years to finally achieve. Over the past few years, Ngo Bao Chau, a Vietnamese mathematician working at Université Paris-Sud and the Institute for Advanced Study (IAS) in Princeton, formulated an ingenious proof of the fundamental lemma. When it was checked this year and confirmed to be correct, mathematicians around the globe breathed a sigh of relief. Mathematicians' work in this area in the last three decades was predicated on the principle that the fundamental lemma was indeed accurate and would one day be proved. "It's as if people were working on the far side of the river waiting for someone to throw this bridge across," says Peter Sarnak, a number theorist at IAS. "And now all of sudden everyone's work on the other side of the river has been proven."
《时代》杂志列为2009年度十大科学发现
1. Our Oldest Ancestor, "Ardi"
2. The Human Epigenome, Decoded
3. Gene Therapy Cures Color Blindness
4. A Robot Performs Science
5. Breeding Tuna on Land
6. Water on the Moon
7. The Fundamental Lemma, Solved
8. Teleportation!
9. The Large Hadron Collider, Revived
10. A New Planet (or Brown Dwarf ) Discovered
- 摘要
12月14日,国家自然科学基金委员会在其官方网站发布通知,《国家自然科学基金面上项目管理办法》、《国家自然科学基金重点项目管理办法》、《国家杰出青年科学基金项目管理办法》、《国家自然科学基金青年科学基金项目管理办法》、《国家自然科学基金地区科学基金项目管理办法》、《国家自然科学基金国际(地区)合作研究项目管理办法》等六个基金项目管理办法,业经2009年9月27日国家自然科学基金委员会委务会议通过,自2010年1月1日起施行。
详见:http://www.sciencenet.cn/htmlnews/2009/12/226137.shtm
- 摘要
几乎每个驾驶员都曾因停车问题烦恼:在路边几乎首尾相连的“车龙”中发现的一小块地方,究竟是否足够让自己的爱车容身?
英国数学家日前研究出解决“完美停车”问题的数学公式。不过,不少人说,这个公式本身比停车还令人头疼。
复杂公式
========
伦敦大学皇家霍洛韦学院数学教授西蒙·布莱克本是这个公式的发明者。他声称,有了公式帮助,任何停车难题都能迎刃而解。
这种复杂数学公式对数学家来说可能是小菜一碟,但对普通人来说就没有那么容易了。
首先,驾驶员需要知道自己爱车的转弯半径以及前后轮距离,这两个数值在公式中分别用字母r和l代表。然后,还需要测算出从车前轮中心点到车子最前端的距离,在公式中用字母k代表。最后驾驶员还需要知道停在自己车旁边的车子的宽度,用字母w代表。
带入公式后,人们需要先算出r的平方减去l的平方,再算出l与k和的平方,然后算出r的平方减l的平方再开方减w后所得数值的平方。接着,把这三个数值的前两项相加,减去第三项,所得数值再开方后,减去l与k。
数学解难
========
布莱克本说,这个公式得出的数字,是除了自身车长外,还需要的停车空间最小值。
英国《每日电讯报》引述他的话报道:“大多数人几乎每天要面对停车入位的考验,有时候这会让我们感觉受挫。”但这个公式“为人们提供完美机会,让人们看到,数学可以用来解决我们共同面对的难题”。
布莱克本说:“这个公式和我们的建议能让人们懂得,实现‘完美停车’的要素都有哪些。如果清楚自己车的角度和尺寸,你就能算出来如何停车。”
“每个人都有不确定空间尺寸是否足够而放弃停车位的经历,这个公式正好能帮助解决这个问题。”
停车难题
========
英国沃克斯霍尔汽车公司不久前进行一项有关停车的调查显示,57%的驾驶员对自己的停车技术缺乏自信,32%的人宁愿开车到距目的地远一点或更贵、车更少的停车场,以免遇到停车麻烦。
调查还显示,英国诺威奇地区的人对停车技术最不自信,最自信的则是威尔士地区居民。
英国媒体说,随着圣诞购物热潮来临,全国将有3500万购物者蜂拥到各家商店,届时,停车位将会变得十分紧俏。沃克斯霍尔汽车公司的调查也显示,15%
的受访者说,圣诞期间在商店附近寻找停车位是他们面临的最大挑战。
沃克斯霍尔汽车公司的西蒙·尤尔特说:“即使对最好的司机来说,停车也是一种挑战。”
- 摘要
据中国博士后科学基金会消息:根据现行《中国博士后科学基金资助规定》,经专家评审,基金会秘书长办公会议和基金理事会审核,批准北京大学张巍等1498人获得第四十六批中国博士后科学基金面上资助。其中122人获得一等资助,资助金额为5万元人民币;1376人获得二等资助,资助金额为3万元人民币。现将获得者名单及资助金额公布于后。
详情请见:http://www.sciencenet.cn/htmlnews/2009/12/226024.shtm
- 摘要
由四川大学长江数学中心举办的“2009 非线性与随机动态国际学术会议”
(2009 International Conference on Nonlinear and Stochastic Dynamics)于2009 年6 月1 日至5 日在成都成功举办。会议的学术委员会主席由郭柏灵和文兰院士担任,组织委员会主席由四川大学长江数学中心首席科学家刘应明院士担任,副主席为美国杨明翰大学吕克宁教授和四川大学数学学院院长彭联刚教授,秘书长为四川大学徐道义和张伟年教授。会议得到了中国数学会的资助。
开幕式由文兰院士主持。首先郭柏灵院士致开幕辞,他对本次会议的召开表示热烈的祝贺,对前来参加会议的代表表示热烈的欢迎。随后,刘应明院士发表了热情洋溢的讲话。四川大学数学学院院长彭联刚教授也参加了开幕式。
参加会议的有来自美国、加拿大、德国、西班牙、香港及国内70 多所高校和研究机构的近140 位代表。在24 位海外主要代表中,有国际微分方程权威刊物《J.Differential Equations》的主编、美国Georgia 理工大学Shui-Nee Chow
教授,美国Brown 大学John Mallet-Paret 教授;该刊编委、美国Brigham Young 大学Kening Lu 教授,美国Georgia 理工大学Yingfei Yi 教授;原《Transactions AMS》编委、美国Michigan 州立大学Peter Bates 教授;美国总统基金获得者Zhihong Xia 教授和Chongchun Zeng 教授;德国Pederborn 大学Bjorn Schmalfuss 教授等。国内主要代表有北京大学张芷芬教授、中山大学周作领教授、中科院数学与系统科学研究院党委书记王跃飞研究员及燕居让、李承治、李继彬、王铎、雍炯敏、汤涛、庾建设等多位老一辈著名数学家、长江学者、国家杰出青年基金获得者、国家自然科学基金重点项目承担者和活跃在学科前沿的知名学者,正是由于他们的到来,才使这次学术会议成为一次学术水平高、代表面相当广的国际微分方程界的学术盛会。
在5天的会议中,分别进行了大会报告与分组学术报告。大会邀请报告共计46 人,其中有16 位国内中青年学者作了40 分钟的大会邀请报告。分组报告16人,墙展15 人。王跃飞、雍炯敏、庾建设、张旭、张伟年等教授在大会报告和会前讲习班中介绍了我国在非线性与随机动态领域的研究进展,他们的报告受到了海内外专家的好评。
为了让更多的年轻人有更多的学习机会,会前还专门组织了“非线性微分方程”讲习班。Peter Bates 教授等10 位海内外著名学者向来自国内23 所高等院校的100 多名学员作了系列学术报告。
通过这次会议,使我们及时了解了非线性与随机动态领域的学科前沿、新成果、新信息及当前研究的热点方向,如无穷维动力系统的随机动态、随机格点动力系统的基本理论、偏微分方程与泛函微分方程的动态行为与控制、环面与球面上的动力系统理论、随机偏微分方程的不变流形(叶层)与吸引子问题、随机泛函微分方程的基本理论、微分方程周期轨及同宿轨分岔、动力系统的双曲性、正规形及嵌入流问题等等;通过这次会议,我们进行了广泛的学术交流,建立了与国内外同行的广泛联系,增进了相互了解与合作,交流了这一领域的科研成果,展示了我国非线性与随机动态方向研究的实力;通过这次会议,更找到了我们研究中的薄弱环节,使我们在今后的工作中,更加明确了努力的方向。
在会议结束后,许多专家学者都对此次会议发表了自己的看法。文兰院士指出: “本次会议安排科学,气氛热烈,是一次高水平的会议、成功的会议。”德国 Pederborn 大学Bjorn Schmalfuss 教授认为:“这是一次出色的学术会议,我们总能找到感兴趣的话题,我们结识了很多年轻的中国学者,他们干的很棒、很出色。”
非线性与随机动态国际学术会议组委会供稿
- 摘要
11月21日,由北方民族大学主办的“宁夏银川2009计算数学及其应用学术研讨会”如期举行,来自中国工程物理研究院计算数学研究所、中科院计算数学研究所等单位的12位专家、近百名研究生和青年教师参加了会议。北方民族大学副校长闵文义对参加此次学术研讨会的各位专家表示热烈的欢迎和诚挚的谢意,他介绍了学校和学校数值计算与工程应用研究所的基本情况。闵文义说,此次北方民族大学学术研讨会是学术交流方面的一次盛会,更是计算数学研究者们一次相互交流的极好机会,对于进一步搭建起我校与各科研机构和兄弟院校的桥梁、互相交流学习、在更高层次上促进学校科研水平和办学实力的提升有着重要的意义;对北方民族大学年轻教师和在校研究生来说,也是一次难得的开阔眼界、增长学识的好机会。研讨会期间,来自西安交通大学、湖南师范大学等高校的专家们分别就微分方程数值解、有限元方法、计算流体力学、动力系统、最优控制等研究领域进行了近20场学术讲座和专场报告。此次研讨会对展示学校科研成果、扩大学术交流、借鉴经验、促进学校研究事业的发展有积极促进作用。
- 摘要
2009年11月17日,上海大学核心数学研究所成立仪式暨学术研讨会在上海大学隆重举行。著名数学家、中国科学院院士杨乐研究员,中国科学院院士、复旦大学洪家兴教授,中国科学院院士、南开大学张伟平教授,中国科学院席南华研究员,香港大学余解台教授出席成立仪式。
上海大学常务副校长周哲玮教授首先致词,向出席会议的专家和来宾表示欢迎,并介绍了上海大学及数学学科的发展与现况。杨乐院士也发表了热情洋溢的致词,对核心数学所的成立表示祝贺,对上海大学数学学科的发展寄予厚望。洪家兴院士在他的致词中强调了核心数学对应用数学乃至应用学科发展的重要性,肯定了上海大学核心数学研究所的成立紧跟了国家科技发展的战略方针。张伟平院士和席南华研究员也分别致词,对核心数学研究所今后的工作和发展提出了设想和规划。仪式由理学院数学系系主任王卿文教授主持。
出席成立仪式的还有:中国科学院黄且园研究员,澳大利亚国立科廷科技大学张国礼教授,台湾中央研究院傅承德研究员,浙江大学沈一兵教授,上海大学副校长吴松教授,科技处处长施立毅教授,人事处处长杨国宏教授,研究生部主任郭长刚教授,校长办公室副主任谭月梅,学科建设办公室副主任田立君,理学院党委书记兼执行院长翁培奋教授等。周哲玮常务副校长与杨乐院士为上海大学核心数学研究所成立共同揭牌。核心数学研究所首任所长由香港大学余解台教授担任。
成立仪式结束后,张伟平院士,余解台教授,席南华研究员以及洪家兴院士分别作了精彩的大会学术报告。数学系教师及研究生共同出席了本次研讨会。
"Chong-Jun Li"
- 摘要
主 题: ICSCA'10 会议征文通知
Aims
The aim of ICSCA'2010 is to bring together mathematicians, scientists and engineers working in the field of scientific computing and its applications to solve scientific and industrially oriented problems and to provide a forum for the participants to meet and exchange ideas of common interest in an informal atmosphere. The topics will be focused on (but not limited to) the following aspects:
* Numerical Analysis
* Computer Graphics
* Scientific and Engineering Computing
* Computing Visualization
* Computational Geometry
* Image Processing
* Wavelets and Fractals
* Intelligence Computation
* CAD/CAM/CAE
* 3D Object Recognition
* Computer Network
* Finite element
Sponsors
Dalian University of Technology, China
University of Alberta, Canada
National Natural Science Foundation of China
China National Basic Research Project (973 Project)
Key Laboratory of High Temperature Gas Dynamics, CAS
Computer Application Institute, Sun Yet-Sen University
General Co-Chairs
Ren-Hong Wang, School of Mathematical Sciences, Dalian University of Technology, China
renhong@dlut.edu.cn
Yau Shu Wong, University of Alberta, Canada
yaushu.wong@ualberta.ca
Scientific Committee
Zhong-Ci Shi (Chair),
Institute of Computational Mathematics, Chinese Academy of Sciences, China
Qun Lin,
Institute of Computational Mathematics, Chinese Academy of Sciences, China
Chi-Wang Shu,
Brown University, USA
Roderick S. C. Wong,
Department of Mathematics, City University of Hong Kong, China
Luc Wuytack,
Department of Mathematics, University of Antwerp, Belgium
Confirmed Invited Speakers
Falai Chen, University of Science and Technology of China, China
Ke Chen, The University of Liverpool, UK
Zhiming Chen, Chinese Academy of Sciences, China
Qiang Du, Pennsylvania State University, USA
Weinan E, Princeton University, USA
Benyu Guo, Shanghai Normal University, China
Rong-Qing Jia, University of Alberta, Canada
Zonglin Jiang, Chinese Academy of Sciences, China
Jichun Li, University of Nevada, USA
Qun Lin, Chinese Academy of Sciences, China
Mitsuhiro T. Nakao, Kyushu University, Japan
Chi-Wang Shu, Brown University, USA
Xiquan Shi, Delaware State University, USA
Tao Tang, Hong Kong Baptist University, China
Jinchao Xu, Pennsylvania State University, USA
Yuesheng Xu, Syracuse University, USA
Shaoliang Zhang, Nagoya University,Japan
Pingwen Zhang, Peking University, China
Organizing Committee
Wei Wu, School of Mathematical Sciences, Dalian University of Technology, China
Bo Yu, School of Mathematical Sciences, Dalian University of Technology, China
Zhixun Su, School of Mathematical Sciences, Dalian University of Technology, China
Zhongxuan Luo, School of Mathematical Sciences, Dalian University of Technology, China
Xiuping Liu, School of Mathematical Sciences, Dalian University of Technology, China
Secretariat
Chong-Jun Li, School of Mathematical Sciences, Dalian University of Technology, China
Email: chongjun@dlut.edu.cn
Phone: +86(0411)84708351-8310
Chun-Gang Zhu, School of Mathematical Sciences, Dalian University of Technology, China
Email: cgzhu@dlut.edu.cn
Phone: +86(0411)84708351-8315
Call for Papers
Submitted papers have to be original, containing new results that were not previously published. All papers will be peer-reviewed; accepted papers MUST be presented at the conference and a delegate may present up to two papers. The abstract (MS Word, about 400 words, in English) and the full paper (PDF, in English) electronically to: chongjun@dlut.edu.cn or cgzhu@dlut.edu.cn before Feb 15, 2010. All accepted papers will be recommended to publish in a special issue of the Journal of and Computational and Applied Mathematics (SCI indexed) and Journal of Information and Computational Science (EI indexed). In order to guarantee the quality of the papers and save the editorial work, we strongly suggest that you prepare your papers in LaTeX. The Instructions to Authors and the template can be found in the website of ICSCA'2010, http://www.icsca2010.org/
Important Dates:
Paper Submission Deadline: Feb.15,2010
Notification of Acceptance: Apr.30,2010
Payment of Registration Due: May.10,2010
Welcome Function/Registration: Jun.12,2010
"Communications in Math Sciences"
- 摘要
主 题:Table of Contents, Communications in Math Sci Vol 8, Nos. 1&2
* Preface
Shi Jin, Panagiotis Souganidis, Eric Vanden-Eijnden, and Xiaoming Wang
* Coupled Stokes-Darcy model with Beavers-Joseph interface boundary condition
Yanzhao Cao, Max Gunzburger, Fei Hua, and Xiaoming Wang
* Catastrophic filter divergence in filtering nonlinear dissipative systems
John Harlim and Andrew J. Majda
* Finite-time blow-up of L∞-weak solutions of an aggregation equation
Andrea L. Bertozzi and Jeremy Brandman
* Filtering a nonlinear slow-fast system with strong fast forcing
Boris Gershgorin and Andrew Majda
* Fast linearized Bregman iteration for compressive sensing and sparse denoising
Stanley Osher, Yu Mao, Bin Dong, and Wotao Yin
* New multi-scale models on mesoscales and squall lines
Andrew J. Majda and Yulong Xing
* Linear response theory for statistical ensembles in complex systems with time-periodic forcing
Andrew Majda and Xiaoming Wang
* On the high intensity limit of interacting corpora
Peter Constantin and Andrej Zlatos
* A stochastic multicloud model for tropical convection
Boualem Khouider, Joseph Biello, and Andrew J. Majda
* Density estimation by dual ascent of the log-likelihood
Esteban G. Tabak and Eric Vanden-Eijnden
* Stable discretization of magnetohydrodynamics in bounded domains
Jian-Guo Liu and Robert Pego
* A coherent semiclassical transport model for pure-state quantum scattering
Shi Jin and Kyle A. Novak
* On the statistical properties of the 3D incompressible Navier-Stokes-Voigt model
Boris Levant, Fabio Ramos, and Edriss S. Titi
* Idealized moist Rayleigh-Benard convection with piecewise linear equation of state
Olivier Pauluis and Jorg Schumacher
* Minmax variational principle for steady balanced solutions of the rotating shallow water equations
Visweswaran Nageswaran and Bruce Turkington
* Study of noise-induced transitions in the Lorenz system using the minimum action method
Xiang Zhou and Weinan E
* Nonlinear inertia-gravity wave-mode interactions in three dimensional rotating stratified flows
Mark Remmel, Jai Sukhatme, and Leslie M. Smith
* The multidimensional maximum entropy moment problem: a review of numerical methods
Rafail V. Abramov
* Application of the stochastic mode-reduction strategy and a priori prediction of symmetry breaking in stochastic systems with underlying symmetry
N. Barlas and I. Timofeyev
* Hybrid deterministic stochastic systems with microscopic look-ahead dynamics
M.A. Katsoulakis, A.J. Majda, and A. Sopasakis
* Reduced dynamics of stochastically perturbed gradient flows
Ibrahim Fatkullin, Gregor Kovacic, and Eric Vanden-Eijnden
* Diffusion limit of the Vlasov-Poisson-Fokker-Planck system
Najoua El Ghani and Nader Masmoudi
* Two coarse-graining studies of stochastic models in molecular biology
Peter R. Kramer, Juan C. Latorre, and Adnan A. Khan
* Intraseasonal multi-scale moist dynamics of the tropical atmosphere
Joseph A. Biello and Andrew J. Majda
* Dynamics of current-based, Poisson driven, integrate-and-fire neuronal networks
Katherine A. Newhall, Gregor Kovacic, Peter R. Kramer, Douglas Zhou, Aaditya V. Rangan, and David Cai
* The exact evolution of the scalar variance in pipe and channel flow
Roberto Camassa, Zhi Lin, and Richard M. McLaughlin
* Stochastic homogenization of Hamilton-Jacobi and "viscous"-Hamilton-Jacobi equations with convex nonlinearities - revisited
Pierre-Louis Lions and Panagiotis E. Souganidis
"JCM"
- 摘要
主题: Journal of Computational Mathematics, No. 4, 27 (2009)
Journal of Computational Mathematics (JCM)
http://www.global-sci.org/jcm
Volume 27, Number 5, September 2009
http://www.global-sci.org/jcm/volumes/v27n5/
Special issue on Adaptive and Multilevel Methods in Computational Electromagnetics
Editors:
Ralf Hiptmair, ETH Zurich, Switzerland
Jinchao Xu, The Pennsylvania State University, USA
Preface.
J. Comp. Math., 27 (2009), pp. 561-562.
http://www.global-sci.org/jcm/volumes/v27n5/pdf/275-561.pdf
Liuqiang Zhong, Shi Shu, Gabriel Wittum, Jinchao Xu
Optimal Error Estimates for Nedelec Edge Elements for Time-Harmonic Maxwell's Equations
J. Comp. Math., 27 (2009), pp. 563-572.
http://www.global-sci.org/jcm/volumes/v27n5/pdf/275-563.pdf
Ralf Hiptmair and Weiying Zheng
Local Multigrid in H(Curl)
J. Comp. Math., 27 (2009), pp.573-603 .
http://www.global-sci.org/jcm/volumes/v27n5/pdf/275-573.pdf
Tzanio V. Kolev and Panayot S. Vassilevski
Parallel Auxiliary Space AMG For H(Curl) Problems
J. Comp. Math., 27 (2009), pp. 604-623.
http://www.global-sci.org/jcm/volumes/v27n5/pdf/275-604.pdf
Mario Bebendorf and Joerg Ostrowski
Parallel Hierarchical Matrix Preconditioners for the Curl-Curl Operator
J. Comp. Math., 27 (2009), pp. 624-641 .
http://www.global-sci.org/jcm/volumes/v27n5/pdf/275-624.pdf
Markus Clemens, Jens Lang, Delia Teleaga and Georg Wimmer Adaptivity in Space and Time for Magnetoquasistatics
J. Comp. Math., 27 (2009), pp.642-656 .
http://www.global-sci.org/jcm/volumes/v27n5/pdf/275-642.pdf
R.H.W. Hoppe and J. Schoeberl
Convergence of Adaptive Edge Element Methods for the 3D Eddy Currents Equations
J. Comp. Math., 27 (2009), pp. 657-676.
http://www.global-sci.org/jcm/volumes/v27n5/pdf/275-657.pdf
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End of CAM Digest
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