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☆─────────────────────────────────────☆ cryppie (北邮人) 于 (Sun Nov 25 00:09:57 2007) 提到: 相信很多人都听说过他的书matrix computation From: Cleve Moler <Cleve.Moler@mathworks.com> Date: Fri, 16 Nov 2007 17:55:42 -0500 Subject: Gene Golub, 1932 - 2007 Gene Golub, founder of the NA Digest, passed away today, Friday, November 16, at the Stanford University Hospital. He was 75 years old. Gene returned home to Stanford recently from a trip to Hong Kong. He was planning to leave again Tuesday on another trip, this one to Zurich where the ETH was to honor him with a special degree. Instead, Sunday night he went to the emergency room because he was "feeling lousy". On Tuesday, he was found to have AML, acute myelogenous leukemia, a form of cancer that affects the white blood cells. This is a potentially curable disease and he was expecting to begin chemotherapy today. But serious complications developed suddenly over night. I was able to see Gene for an hour last night and he was in reasonably good spirits. Mike Saunders was trying to get Gene's laptop to use dial-up over the hospital's phone system because Gene said he was a couple of days behind on his email. I was planning to get a wireless card for his machine today. None of us had any idea how suddenly the situation would worsen. The Stanford iCME students have created a memorial blog at http://genehgolub.blogspot.com . Our community has lost its foremost member. He was a valued colleague and friend. Goodbye, Gene. -- Cleve Moler ------------------------------------------------------- From: Joe Grcar <jfgrcar@lbl.gov> Date: Fri, 16 Nov 2007 10:26:08 -0800 Subject: Gene Golub Gene Golub died around 9AM this Friday morning November 16, at the age of 75, after a sudden turn for the worse in his health. His career spanned almost the entire history of postwar numerical analysis, to which he made seminal contributions, among which are beautiful algorithms that have proven to be of great importance in matrix and statistical computations. Not the least of his contributions is the legacy of congeniality in gatherings both internationally and at his beloved Stanford University. I can see him in his office or home surrounded by students and younger researchers and hear him tell me that this interaction was what he cherished most. Yet when living memory of him passes, the algorithms he created will continue to be used, probably indefinitely. ☆─────────────────────────────────────☆ river (river) 于 (Sun Nov 25 00:20:34 2007) 提到: 关于昨天你的那个pca的帖子，我大致想了一下，计算covariance matrix的乘法次数应该是o(n^2)吧，pca的复杂度主要应该是eigenproblem吧。关于后者，就在matrix computation书中专门有一章就是讲这个的，不过印象中的好像是o(n^3)。 ps：我也是估算，没有仔细计算。 ☆─────────────────────────────────────☆ river (river) 于 (Sun Nov 25 00:22:57 2007) 提到: 对了，我给lz站内邮箱发信了，不知道收到了么 ☆─────────────────────────────────────☆ cryppie (北邮人) 于 (Sun Nov 25 00:32:19 2007) 提到: sorry，似乎没有明白我的意思。不过，我已经找到了【在 river 的大作中提到: 】 : 关于昨天你的那个pca的帖子，我大致想了一下，计算covariance matrix的乘法次数应该是o(n^2)吧，pca的复杂度主要应该是eigenproblem吧。关于后者，就在matrix computation书中专门有一章就是讲这个的，不过印象中的好像是o(n^3)。 : ps：我也是估算，没有仔细计算。 ☆─────────────────────────────────────☆ goldfish (金鱼~伊好有才气啊!!~) 于 (Sun Nov 25 10:51:27 2007) 提到: 默哀 ☆─────────────────────────────────────☆ cryppie (北邮人) 于 (Sun Nov 25 19:06:45 2007) 提到: 金鱼，nw在什么地方？离普林近吗？【在 goldfish 的大作中提到: 】 : 默哀 ☆─────────────────────────────────────☆ DongFangzhuo (曼联董) 于 (Sun Nov 25 20:04:02 2007) 提到: 默哀 ☆─────────────────────────────────────☆ goldfish (金鱼~伊好有才气啊!!~) 于 (Mon Nov 26 05:52:49 2007) 提到: nw在中部偏东，芝加哥地区。普林在新泽西，东部。论距离还行，不是太远，不过纽约，波士顿那块离着更近些。师兄对普林有兴趣啊。【在 cryppie 的大作中提到: 】 : 金鱼，nw在什么地方？离普林近吗？

[合集] [哀悼]美国科学院院士Gene Golub逝世