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《美丽心灵》男主角生活原型约翰·纳什与路易斯·尼伦伯格分享2015阿贝尔奖

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楼主
发表于 2015-3-26 11:15:34 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
本帖最后由 酒哥 于 2015-3-26 11:17 编辑

《美丽心灵》男主角生活原型约翰·纳什与路易斯·尼伦伯格分享2015阿贝尔奖

阿贝尔奖是最高级别的数学奖之一。

约翰·纳什与路易斯·尼伦伯格都是由于他们“在非线性偏微分方程理论及其对几何分析的应用方面的引人注目的和开创性的贡献”
(“for striking and seminal contributions to the theory of nonlinear partial differential equations and its applications to geometric analysis.”)
获奖。

约翰·纳什的得奖具体地应该是因为DeGeorgi-Nash估计。这是偏微分方程理论的一项主要突破和建树。
但为何得奖人没有DeGeorgi?DeGeorgi在这个突破中的贡献是无可置疑的,而纳什的贡献是有那么一点点质疑的。
(纳什用该估计解决的那个嵌入问题现在也无需用那个重要估计就可解决,当然这是较小的事)。


路易斯·尼伦伯格是对中国人十分友好的美国犹太数学家。许多中国数学家因为他的提携在美的数学事业早期发展较为顺利。






John F. Nash Jr. and Louis Nirenberg share the Abel Prize


John F. Nash Jr. and Louis Nirenberg share the Abel Prize
The Norwegian Academy of Sciences and Letters has decided to award the Abel Prize for 2015 to the American mathematicians John F. Nash Jr. and Louis Nirenberg “for striking and seminal contributions to the theory of nonlinear partial differential equations and its applications to geometric analysis.” The President of the Academy, Kirsti Strøm Bull, announced the new laureates today 25 March. They will receive the Abel Prize from His Majesty King Harald at a ceremony in Oslo on 19 May.
John F. Nash Jr., aged 86, spent his career at Princeton University and the Massachusetts Institute of Technology. Louis Nirenberg, aged 90, worked at New York University’s Courant Institute of Mathematical Sciences. Even though they did not formally collaborate on any papers, they influenced each other greatly during the 1950s. The results of their work are felt more strongly today than ever before.

Mathematical giants
Nash and Nirenberg are two mathematical giants of the twentieth century. They are being recognized for their contributions to the field of partial differential equations (PDEs), which are equations involving rates of change that originally arose to describe physical phenomena but, as they showed, are also helpful in analyzing abstract geometrical objects. The Abel committee writes: “Their breakthroughs have developed into versatile and robust techniques that have become essential tools for the study of nonlinear partial differential equations. Their impact can be felt in all branches of the theory.”
In the 1950s Nash proved important theorems about PDEs, which are considered by his peers to be his deepest work. Outside mathematics, however, Nash is best known for a paper he wrote about game theory, the mathematics of decision-making, which ultimately won him the 1994 Nobel Prize for economics, and which features strongly in the 2001 film about him, A Beautiful Mind.

Long career
Nirenberg, who was born in Canada, has had one of the longest and most feted careers in mathematics, having produced important results right up until his 70s. Unlike Nash, who wrote papers alone, Nirenberg preferred to work in collaboration with others, with more than 90 per cent of his papers written jointly. Many results in the world of elliptic PDEs are named after him and his collaborators, such as the Gagliardo–Nirenberg inequalities, the John–Nirenberg inequality and the Kohn–Nirenberg theory of pseudo-differential operators.
“Far from being confined to the solutions of the problems for which they were devised, the results proven by Nash and Nirenberg have become very useful tools and have found tremendous applications in further contexts,” the Abel committee says.

Many awards
Both men have received many distinguished awards. As well as winning the prize in economic sciences in memory of Alfred Nobel, Nash has won the John von Neumann Theory Prize (1978) and the American Mathematical Society’s Steele Prize for a Seminal Contribution to Research (1999). Nirenberg has won the American Mathematical Society’s Bôcher Memorial Prize (1959) the inaugural Crafoord Prize awarded by the Royal Swedish Academy of Science (1982), the Steele Prize for Lifetime Achievement from the American Mathematical Society (1994) and the first Chern Medal for lifetime achievement from the International Mathematical Union and the Chern Medal Foundation (2010).


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沙发
 楼主| 发表于 2015-3-27 08:14:02 | 只看该作者
本帖最后由 酒哥 于 2015-3-27 08:23 编辑

许多中国数学家如丘成桐林芳华田刚林长寿张圣蓉等等等等
都在事业早期得到过尼伦伯格的提携。
当然他们工作是成功的主要因素。
但在事业的早期有尼伦伯格这样的学问和人品两方面
受到学界广泛一致的尊重、一言九鼎的重量级数学家出来说好,
他们的成果就得到了保护和学界的迅速认可。
这是他们早年就得到迅速升迁的一个因素。

丘成桐至少得到尼伦伯格三次较大的帮助。

第一次,丘出道时初次宣布证明了(陈省身示性类为零的情形的)
卡拉比猜想(丘当时的证明中还有一点小问题没有搞定,但丘
说这个小问题他随后很快就可以搞定,事实也如此)。
法国的T.Aubin听说后很快就宣布解决了该猜想。
当时有些争议。最后的公认credit是丘的。
这过程中尼伦伯格的意见份量很重。

(后来的(陈省身示性类为负的情形的)
卡拉比猜想的credit是丘与T.Aubin分享的。这也符合事实。)

第二次是丘成桐与M.Gromov争菲尔兹奖。
两人都很杰出(当时丘略有优势),
但他俩的当时工作领域比较靠近,
同领域的工作如果份量差不太多一般菲尔兹奖只能给一人。
尼伦伯格的意见有利于丘。
(后来M.Gromov获Wolf奖和阿贝尔奖,
丘则获Crafoord奖和Wolf奖。)

第三次是2006的庞加莱猜想风波,丘被学界大佬群殴时,
尼伦伯格在关键时刻写了封信。这封信的份量很重,
这信与R. Hamilton的信是所有信中分量最重的两封。
风波到这封信为止开始消停。
看国内的报道,国内记者不大知道这个情况,
把哈佛的几位几位数学教授的信看得很重
把尼伦伯格的信看得很轻(可能是因为尼伦伯格是NYU的教授
而不是哈佛普林伯克利斯坦福的教授,其实那些学校的PDE
教授基本上都是NYU的Courant所出去的)。那几位哈佛教授
的份量完全不能与尼伦伯格相比。

林芳华刚从明尼苏达大学博士毕业不久28岁时拿到
芝加哥大学的(终身)正教授与尼伦伯格的大力推荐有关。
明大数学系是很不错,但排名排不上前20。
芝大数学系是顶级系,与普林哈佛伯克利MIT斯坦福一样
(其实后几者都受益于芝大的数学家,如Birkhoff之于哈佛数学
Veblen之于普林数学,陈、Kaplansky等之于伯克利数学等)
在美国学界,从上级学校往下走容易,从下往上走极端极端难。
除非已有顶级成就拿过菲尔兹诺贝尔等。比如说
芝大是从博后的位上直接聘Zelmanov做教授,但那是
他刚拿菲尔兹。
林当时刚出道,并没有菲尔兹这类荣誉。

田刚以三十岁的年纪拿到NYU的Courant的(终身)正教授
也与尼伦伯格的推荐有很大关系。


还有很多其他例子,比如说:丁伟岳有几个好的结果开始时
是找尼伦伯格要的题目。

当然他们的成就也配得上述那些。

有一位斯坦福的教授一次甚至夸张地说,
去美国去Courant,无非是去找尼伦伯格,
三个月见他一次。。。。。。


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