李亚纯
非线性偏微分方程的理论与应用。
个性化签名
- 姓名:李亚纯
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
数理逻辑与数学基础
- 研究兴趣:非线性偏微分方程的理论与应用。
李亚纯,教授,博士生导师,副系主任。研究兴趣:非线性偏微分方程的理论与应用。
教育背景:1988年7月,复旦大学数学系,本科毕业,获理学学士学位;上海市高等院校优秀毕业生;1994年6月,复旦大学数学所,博士毕业,获理学博士学位。
工作经历:1994.08-,上海交通大学数学系,1996年12月起任副教授,2005年8月起聘教授;1999年10月至2000年8月,美国哈佛大学与西北大学高级访问学者;2002年9月至2003年7月,美国西北大学访问教授。
短期学术访问:2002.7-8: 北京晨兴数学中心;2004.6-7: 德国Heidelberg 大学和Wuerzburg大学;2004.12: 台湾中央研究院数学所;2005.1-2, 2008.1-2: 香港城市大学数学系。
主要科研项目:教育部“2007新世纪优秀人才支持计划”;上海市教委曙光计划项目:“流体力学与相关的非线性偏微分方程”,2007.1-2009.12 (主持);国家自然科学基金项目:“流体力学中某些数学问题的定性研究”, 2006.1-2008.12 (主持);;上海市自然科学基金项目:“相对论流体力学中的数学问题”,2004.11-2007.12(主持);;国家自然科学基金“非线性守恒律方程(组)的理论与数值方法的某些问题”,2002.1-2004.12(主持);国家教育部留学回国人员启动基金“可压缩Euler方程组间断解的唯一性和稳定性”,2002.1-2003.12(主持);国家自然科学基金“Columbeau广义函数与非线性高频振荡波”,1996.1-1998.12(参加)。
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成果阅读
524
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成果数
12
【期刊论文】Uniqueness and Stability of Riemann Solutions with Large Oscillation in Gas Dynamics
李亚纯, Gui-Qiang Chen, Hermano Frid, Yachun Li
Commun. Math. Phys. 228, 201-217(2002),-0001,():
-1年11月30日
We prove the uniqueness of Riemann solutions in the class of entropy solutions in L∞ ∩ BVloc with arbitrarily large oscillation for the 3×3 system of Euler equations in gas dynamics. The proof for solutions with large oscillation is based on a detailed analysis of the global behavior of shock curves in the phase space and the singularity of centered rarefaction waves near the center in the physical plane. The uniqueness of Riemann solutions yields their inviscid large-time stability under arbitrarily large L1 ∩ L∞ ∩ BVloc perturbation of the Riemann initial data, as long as the corresponding solutions are in L∞ and have local bounded total variation satisfying a natural condition on its growth with time. No specific reference to any particular method for constructing the entropy solutions is needed. The uniqueness result for Riemann solutions can easily be extended to entropy solutions U(x, t), piecewise Lipschitz in x, for any t>0, with arbitrarily large oscillation.
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33浏览
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引用
李亚纯, Yachun Li
Z. angew. Math. Phys. 55(2004)48-62,-0001,():
-1年11月30日
The global stability of Lipschitz continuous solutions with discontinuous initial data is established in a broad class of entropy solutions in L∞ containing vacuum states. In particular, the uniqueness of Lipschitz solutions with discontinuous initial data is obtained in the broad class of entropy solutions in L∞.
Isentropic Euler equations, entropy solutions, continuous solutions, discontinuous initial data, global stability,, uniqueness
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36浏览
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李亚纯, Gui-Qiang Chen and Yachun Li
Z. angew. Math. Phys. 55(2004)903-926,-0001,():
-1年11月30日
We analyze global entropy solutions of the 2×2 relativistic Euler equations for isentropic fluids in special relativity and establish the uniqueness of Riemann solutions in the class of entropy solutions in L∞ ∩BVloc with arbitrarily large oscillation. The uniqueness result does not require specific reference to any particular method for constructing the entropy solutions. Then the uniqueness of Riemann solutions implies their inviscid time-asymptotic stability under arbitrarily large L1 ∩ L∞ ∩ BVloc perturbation of the Riemann initial data, provided that the corresponding solutions are in L∞ and have local bounded total variation that allows the linear growth in time. This approach is also extended to deal with the stability of Riemann solutions containing vacuum in the class of entropy solutions in L∞ with arbitrarily large oscillation.
Relativistic Euler equations, isentropic fluids, special relativity, discontinuous entropy solutions, Riemann solutions, uniqueness, time-asymptotic stability, Lorentz transformation,, scaling sequence, compactness.,
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34浏览
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【期刊论文】Global entropy solutions to the relativistic Euler equations for a class of large initial data
李亚纯, Yachun Li; Dongmei Feng and Zejun Wang
Z. angew. Math. Phys. 56(2005)239-253,-0001,():
-1年11月30日
We are concerned with global entropy solutions to the relativistic Euler equations for a class of large initial data which involve the interaction of shock waves and rarefaction waves. We first carefully analyze the global behavior of the shock curves, the rarefaction wave curves, and their corresponding inverse curves in the phase plane. Based on these analyses, we use the Glimm scheme to construct global entropy solutions to the relativistic Euler equations for the class of large discontinuous initial data.
Relativistic Euler equations, special relativity, discontinuous entropy solution, Lorentz transform, Glimm difference scheme, interactions of shocks and rarefaction waves.,
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49浏览
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63下载
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李亚纯, Yachun Li and Yongcai Geng
Z. angew. Math. Phys. 57(2006)960-983,-0001,():
-1年11月30日
We consider in this paper the relativistic Euler equations in isentropic °uids with the equation of state p=к2p, whereк, the sound speed, is a constant less than the speed of light c. We discuss the convergence of the entropy solutions as c→∞. The analysis is based on the geometric properties of nonlinear wave curves and the Glimm's method.
Isentropic relativistic Euler equations, entropy solutions, Riemann solutions, Glimm', s scheme,, Lorentz transformation
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43浏览
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69下载
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李亚纯, Yongcai Geng; Yachun Li
Z. Angew. Math. Phys. 61(2010), 201-220,-0001,():
-1年11月30日
We are concerned in this paper with the non-relativistic global limits of the entropy solutions to the Cauchy problem of 3×3 system of relativistic Euler equations modeling the conservation of baryon numbers, momentum, and energy respectively. Based on the detailed geometric properties of nonlinear wave curves in the phase space and the Glimm’s method, we obtain, for the isothermal flow, the convergence of the entropy solutions to the solutions of the corresponding classical non-relativistic Euler equations as the speed of light c → +∞.
Relativistic Euler equations, Lorentz invariance, Newtonian limits, Riemann problem, Cauchy problem, Shocks, Rarefaction waves, Glimm’s scheme, Approximate solutions.,
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28浏览
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45下载
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李亚纯, Yongcai Geng and Yachun Li
Z. Angew. Math. Phys. 62(2011), 281-304,-0001,():
-1年11月30日
We consider the Riemann problem of three-dimensional relativistic Euler equations with two iscontinuous initial states separated by a planar hypersurface. Based on the detailed analysis on the Riemann solutions, special relativistic effects are revealed, which are the variations of limiting relative normal velocities and intermediate states and thus the smooth transition of wave patterns when the tangential velocities in the initial states are suitably varied. While in the corresponding non-relativistic fluid, these special relativistic effects will not occur.
Relativistic Euler equations, Riemann solutions, Relativistic effects, Relativity invariants, Lorentz factor.,
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28浏览
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【期刊论文】带粘弹性边界条件的耦合非线性波动方程组的整体可解性
李亚纯
数学年刊,1994,15(5):546~562,-0001,():
-1年11月30日
本文讨论了两根非线性弹性杆的耦合问题,利用沿特征线积分与能量估计相结合的方法,证明了在该系统一端及两杆之间用某一粘弹性单元连接时,具小初值的初边值问题存在整体经典解。
非线性波动方程, 粘弹性条件, 特征线, 能量估计
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60浏览
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70下载
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【期刊论文】带耗散的一阶非线性偏微分方程组的Cauchy问题
李亚纯
应用数学与计算数学学报,1994,8(1):47~54,-0001,():
-1年11月30日
本文采用整体迭代法证明了带小初值的一阶非线性耗偏微分方程组的Cauchy问题的整体经典解的存在性及指数衰减性质。
双曲型方程组, 衰减估计, 整体迭代法
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72浏览
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李亚纯, 李亚纯*
数学年刊,1996,17(4):451~466,-0001,():
-1年11月30日
本文利用整体迭代法讨论了具耗散项的完全非线性波动方程具小初值的柯西问题的经典解的存在性及生命跨度的下界估计。
整体迭代, 生命跨度, 非线性被动方程
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55浏览
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