d****g
发帖数: 7460 | 1 其实呢，就是说如果１０X１０X１０。。。能整除一个数N，那么１／N就是有限小数，
反之无限循环。。
为什么循环呢？因为一个数除以N，余数最多有N－１种情况，所以必然循环。。
而且循环节最长为N－１，好比１／７＝０。１４５６２８，循环节长度为６。
但是１／３＝０。３３３，循环节长度为１。所以不是所有的质数P都有P－１那么长的
循环节。
谁有呢，7, 17, 19, 23, 29, 47, 59, 61, 97。。。。
什么样的数有，什么样的数没有，这样的数有无数多个吗？
哈哈，这个问题居然还没有人能回答！是个OPEN QUESTION。。
http://mathworld.wolfram.com/CyclicNumber.html
＂It has been conjectured, but not yet proven, that an infinite number of
cyclic numbers exist. ＂
http://mathworld.wolfram.com/FullReptendPrime.html |
|
t*s
发帖数: 1504 | 2 Yao was terminated on May 14th 10.
Sent to my from the vice president of NIU.
Only one sentence in the email
The actual words used are "... was terminated on ..."
My conjecture is wrong. It looks like that he was not convicted. |
|
s********u
发帖数: 1054 | 3 A Presidential Reason to Buy Stocks By JEFF SOMMER
Published by NY TIMES on October 9, 2010
ECONOMIC growth is precarious, unemployment is painfully high, debt levels
are staggering and the stock market isn’t all that cheap.
That’s the view of Jeremy Grantham, the chief investment strategist at GMO,
the Boston investment firm, who believes that the stock market is bound to
endure some very lean years. But in the near term, there is a good chance
that the market will rally, he said.
Why? “We are... 阅读全帖 |
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f******d
发帖数: 6361 | 4 谨以此文与正在攻读数学phd的马有图贤弟共勉：）
【 以下文字转载自 History 讨论区 】
发信人: Communipig (共产猪), 信区: History
标 题: 费尔马大定理
发信站: BBS 未名空间站 (Thu Oct 6 22:26:48 2011, 美东)
http://my.cnd.org/modules/wfsection/article.php?articleid=30156
·叶 厚·
1. Pythagoras Theorem
这要从公元前六世纪古希腊的毕达哥拉斯讲起。
那时候的天空比现在的洁净，海水比现在的蓝。年轻的毕达哥拉斯周游列国，据说他往
西到过不列颠，往东到过印度。到印度恐怕只是传说。他是孜孜不倦的学生，在世界各
地学习各种技术，比如巴比伦人交易中用的算术，埃及人测量大地的方法。他有个奇异
的信念，就是这些琐碎复杂的技术后面有个永恒的无处不在的力量。他把它叫成“哲学
”。
二十年之后他扬帆回到家乡。这是爱琴海中的一个小岛--萨莫斯。他计划成立一个哲学
学校，但没能实现。博学的毕达哥拉斯被委以重任，致使他公务繁忙。他随即离开萨莫
斯，到遥远... 阅读全帖 |
|
f****r
发帖数: 5118 | 5 现在转变为Carl Icahn 开始报复Ackman了， Icahn这个人还真难缠
After J.C. Penney (JCP) disclosed its receipt of a letter that purports to
be a notice of default from a law firm representing an ad hoc group of
certain bondholders, a contributor to the financial blog Zero Hedge laid out
a set of circumstances that could lead to suspicion that Carl Icahn may
have potentially had a hand in the bondholders pushing to take action
against the retailer, in which Icahn's rival Bill Ackman holds a 17.8% stake
. The report sta... 阅读全帖 |
|
t******t
发帖数: 772 | 6
head of household， 纳税人要unmarried, 或是abandoned spouse. 何况孩子如果在国内能不能申请为dependent，也是个问题。这个还要看tie breaker ruler.it is logic to conjecture 这个国内孩子是妈妈的dependent
不要去强辩税务局不知道，而行一些偷税的事。我们提倡合法的税务帮助，准确的法律咨询。 |
|
S**I
发帖数: 15689 | 7 孩子不在美国肯定不能用head of household，在美国的话应该可以：1040
instruction page 16：
Nonresident alien spouse. You are considered unmarried for head of household
filing status if your spouse was a nonresident alien at any time during the
year and you do not choose to treat him or her as a resident alien. To
claim head of household filing status, you must also meet Test 1 or Test 2
on page 15.
在国内能不能申请为dependent，也是个问题。这个还要看tie breaker ruler.it is
logic to conjecture 这个国内孩子是妈妈的dependent
律咨询。 |
|
y0
发帖数: 231 | 8 发信人: ludiman (ludiman), 信区: Military
标 题: 这个google事件再次说明Chinese没有诚信
发信站: BBS 未名空间站 (Tue Mar 22 19:58:00 2011, 美东)
现在世界上，国家之间, Chinese 就和假货，有毒食品，有毒玩具联系在一起。在学术
见，Chinese 教授就是和抄袭论文, plagiarism,联系在一起（那 Poincare
conjecture 事件），Chinese学生就是和考试作弊，成绩单作弊联系在一起(harvard,
mit每年招生处招了很多资料作假的Chinese学生）。
现在在职场里，Chinese就是interview作弊。
总体让人感觉，和Chinese合作让人非常没有安全感，很untrustworthy.
混乱
属于 |
|
p****a
发帖数: 9 | 9 Timeline:
NIW RD June 2007
NIW AD February 2008
I485 RD August 2007
EB1B RD October 2010
PP April 21 2011
AD April 27 2011
My background:
Ph.D in EE from a US university. Working in industry for 5 years.
3 Journal papers (2 on top ones in my field and 1 shitty one), 2 book
chapters, 7 conference papers. 1 pending patent.
50+ citations and most are independent.
10 reviews. 1 senior membership from a professional association.
2 media reports about products I developed but no name menti... 阅读全帖 |
|
l******t
发帖数: 2243 | 10 congrats
发信人: pavaca (haha), 信区: Immigration
标 题: EB1B pp approval without RFE at TSC
发信站: BBS 未名空间站 (Thu May 5 18:43:13 2011, 美东)
Timeline:
NIW RD June 2007
NIW AD February 2008
I485 RD August 2007
EB1B RD October 2010
PP April 21 2011
AD April 27 2011
My background:
Ph.D in EE from a US university. Working in industry for 5 years.
3 Journal papers (2 on top ones in my field and 1 shitty one), 2 book
chapters, 7 conference papers. 1 pending patent.
50+ citations and most are inde... 阅读全帖 |
|
c***u
发帖数: 4107 | 11 如果引用你的文章时, explicitly用到下列词, 都是牛逼亮点(这些词本身就是亮点)
apply your whatever (e.g., your methods/data/theories/discoveries/results/
idea/figures/tables/proposals/conjectures/etc)
use your whatever to assert
incorporate your whatever
implement your whatever
compare your whatever to others
base on/rely on your whatever
follow your whatever
confirm/support/challenge/argue/improve your whatever
reproduce your whatever
your whatever results in others
adopt your whatever
establish ** based on your whatever |
|
c***u
发帖数: 4107 | 12 如果引用你的文章时, explicitly用到下列词, 都是牛逼亮点(这些词本身就是亮点)
apply your whatever (e.g., your methods/data/theories/discoveries/results/
idea/figures/tables/proposals/conjectures/etc)
use your whatever to assert
incorporate your whatever
implement your whatever
compare your whatever to others
base on/rely on your whatever
follow your whatever
confirm/support/challenge/argue/improve your whatever
reproduce your whatever
your whatever results in others
adopt your whatever
establish ** based on your whatever |
|
z****g
发帖数: 3509 | 13 A facially ethnicity-neutral policy is better than a facially discriminatory
policy (which is what the current policy is), and I support the facially
ethnicity-neutral policy on that basis alone. I do not particularly care
about any conjectured "main goal" other than what is actually stated on the
face of the policy. I do not particularly care who would eventually benefit
either. What matters to me is that on the face of the policy everyone is
treated the same irrespective of ethnicity or cou... 阅读全帖 |
|
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b*****s
发帖数: 11267 | 15 I am joking
this is the so called Goldbach Conjecture
As I know ,no one got the prove yet |
|
a*****g
发帖数: 19398 | 16 长篇文章：Why Do Americans Stink at Math?
When Akihiko Takahashi was a junior in college in 1978, he was like most of
the other students at his university in suburban Tokyo. He had a vague sense
of wanting to accomplish something but no clue what that something should b
e. But that spring he met a man who would become his mentor, and this relati
onship set the course of his entire career.
Takeshi Matsuyama was an elementary-school teacher, but like a small number
of instructors in Japan, he taught no... 阅读全帖 |
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s*********1
发帖数: 1166 | 17 Wang Hao, also Hao Wang (Chinese: 王浩; pinyin: Wáng Hào; 20 May 1921 –
13 May 1995) was a Chinese American logician, philosopher and mathematician.
Born in Jinan, Shandong, in the Republic of China (today in the People's
Republic of China), Wang received his early education in China. After
obtaining a B.Sc. degree in mathematics from the National Southwestern
Associated University in 1943 and an M.A. in Philosophy from Tsinghua
University in 1945, he moved to the United States for further graduat... 阅读全帖 |
|
u**a
发帖数: 6 | 18 人心变了，想改变生活。
寂寞得胡思乱想，
突然得到一个有意思的insight（draft）。
truth is so simple??
question： 男人出轨的动力究竟是什么？
answer： 部分来源于人性。不合理的搭配起了杠杆效应。
Theorem 1: 男人无法容忍一夫一妻制。
Remark: 家庭本生就是财产私有化的产物，一夫一妻制作为家庭框架下的一个概念只有
在私有制的社会才有其法律和道德上的合理性。可是制度可以比较有效地管住人的行为
，却管不住人的心。被大师们批判过的一夫一妻制本生违背人性。它有诞生的一天，就
会有消亡的一天。所以，人性是出轨的原动力。
Lemma 1（来源不明）：
P(A男配B女
B男配C女
。
。
E男配A女)=80%
P(single to death)=10%
Lemma 2: P（女人的贪念比男人更重）=80%
Remark: 贪心的人，最终会伤了自己。
Theorem 2: 资本主义下的人们比封建主义下的人们更容易出轨，涉及人群更庞大。
Proof:
（1）发生Lemma 1的情况。
封建社会下，阶级稳定，婚姻原则也是门当户对，基本是A男配... 阅读全帖 |
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p**********u
发帖数: 15479 | 19 Zhang's Ph.D. work was on the Jacobian conjecture. He originally thought he
had solved the problem until a lemma he cited from his advisor Tzuong-Tsieng
Moh's previous paper was found to be wrong.[8] After graduation, Zhang had
a hard time finding an academic position. In a recent article, Zhang's
thesis supervisor, Professor Tzuong-Tsieng Moh, said that "Sometimes I
regreted not fixing him a job" and "He never came back to me
requesting recommendation letters."[7] He is currently a lectur... 阅读全帖 |
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p**********u
发帖数: 15479 | 20 【 以下文字转载自 Mathematics 讨论区 】
发信人: jamesbeyond (国产铃铃漆), 信区: Mathematics
标 题: Re: 来点实料《张益唐和北大数学78级》
发信站: BBS 未名空间站 (Fri May 24 17:04:14 2013, 美东)
这一段是独家的：
张益唐为什么会落脚新罕布什尔大学？很多人都会觉得有些好奇。这里面有两个主要人
物，都是我们80级的同学；一个是唐朴祁，一个是葛力明。在北大上本科时，唐朴祁、
葛力明等就开始组织论文讨论班，自己找论文，互相报告自己读的文章、讨论一些新的
观点。高两届的张益唐就曾经在这个学生讨论班里给过报告，他的数学智慧也让学弟们
非常佩服。几年以后，我们那届的湖南省高考理科状元唐朴祁也和张益唐一起来到普渡
大学留学，再次成为校友和好朋友。唐朴祁毕业以后去了计算机公司，但他仍然很关心
老同学张益唐。
时机的来临在葛力明1995年从宾州大学博士毕业；之后他来到了新罕布什尔大学数学系
。一直关心张益唐的他开始联系唐朴祁，想在人海里找到张益唐。他们知道张益唐曾在
纽约的餐馆、肯塔基的旅馆打过工，但联系到这些地方... 阅读全帖 |
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p**********u
发帖数: 15479 | 21 刚Google了他沪杰出人才老张
1 居然去了UCSD. 爽死了。这么好的地方。evelyn lin 的母校。
2 nationality, USA. 我靠，老张不会瞎写的。估计他家里是不是父母有美国护照？一
般中国人只有生在美国的，叫USA
3 老婆名字曝光了。sun yaling Helem.
4 目前最高荣誉，台湾中央科学院院士。绝对贵族群。解放前混上海的，解放后去美国
混学术界的，无一例外全在那里。据说每年在美国独立日举行大型碰头会。
5
Zhang was born in Shanghai and lived there until he was 13 years old. At
around the age of nine, he found a proof of the Pythagorean theorem.[7] He
first learned about Fermat’s last theorem and the Goldbach conjecture
when
he was 10.
妈的，这种绝对是数二代家庭了。当时是文革前。上海普通家庭里文盲都没有... 阅读全帖 |
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B******1
发帖数: 9094 | 22 发信人: ReedToBe (ReedToBe), 信区: Mathematics
标 题: ZZ:北大78级数学，张益唐 （里面有莫宗坚的八卦）by Tang Tao
发信站: BBS 未名空间站 (Tue May 21 08:59:56 2013, 美东)
张益唐在美国的导师是从台大走出去的代数专家莫宗坚（Tzuong-Tsieng Moh），他
1969年到的普渡大学开始学术生涯。北京大学数学丛书里面的莫宗坚的《代数学》
（上、下）是很不错的代数参考书。莫老师也是性情中人，网上流传的他的《少年游–
我的大学时代》很精彩；看看小标题就能体会到：“读书记 ；生活记；恋爱记；跷课
记..."。文章开头一段：“民国四十七年（一九五八年）我从中部的台中一中考上了台
大化学系。 当我只身远赴台大报到入学时，看到堂堂学府，几排高大的椰子树，眼睛
为之一亮。 又有梳着清汤挂面头发的女生们奔走在校内路上，真是一个新奇的世
界！”就颇为雷人。中间追女生段的开头“经过了一、二年的苦读，我才发现女同学们
脸若春花，眸若点漆。 有些小和尚们，经也不念，钟也不打：「不拜佛祖，只拜观
音。」王俊明坦言：「不... 阅读全帖 |
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h*****1
发帖数: 33 | 23
SAT
I am conjecturing that there is a parent's push factor, esp. amongst the
Asian families; e.g. the parents push more tutoring classes and more SAT
prep books. This factor works for larger Asian schools like MSJ, that is
why MSJ has more high end SAT than others.
More Asians, more push, larger number of high SAT scores.
For the lower average MSJ vs. Lynbrook, I believe some parents just resign
to the fact it is not worth to pay to cross 2250 line. When there is no
under push, the laggards pe... 阅读全帖 |
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i***l
发帖数: 468 | 24 【 以下文字转载自 Military 讨论区 】
发信人: xiaoxiaoxi (小小溪), 信区: Military
标 题: Re: 全美英特尔科学奖决赛名单公布 13名华裔入围
发信站: BBS 未名空间站 (Sat Jan 24 16:00:54 2015, 美东)
Intel STS 2015 Finalists
Anandapadmanaban, Eswar
Dr. Ronald E. McNair Academic High School, Jersey City, NJ
The ThereNIM: A Touch-less Respiratory Monitor
Ashkin, Emily Lorin
Providence Day School, Charlotte, NC
A Novel Synergistic Approach for Enhancing Immunotherapy in the Treatment of
Melanoma
Chemparathy, Augustine George
Dougherty Valley High School, Sa... 阅读全帖 |
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l**t
发帖数: 10440 | 25 写的不错，值得一读，也帮大家了解为何SD7特别选举中SVCA力挺Steve Glazer
May 22, 2015 by Richard Eber Leave a Comment
At the Steve Glazer Senate victory celebration in Orinda on the evening of
May 19th, it did not take long to realize the ramifications of this
landslide victory over Susan Bonilla to serve the remaining 19 months of
Mark DeSaulnier’s State Senate term.
Long before his opponent text messaged her official concession, Glazer
received a phone call from the Speaker Pro Tem of the State Senate Kevin De
Leon (D-Lo... 阅读全帖 |
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t**x
发帖数: 20965 | 26 http://www.thestreet.com/story/11976168/1/ballmer-will-drive-mi
Ballmer Will Drive Microsoft to Its Death
BY Rocco Pendola | 07/11/13 - 03:34 PM EDT
Stock quotes in this article: MSFT, GOOG, AAPL
Find out if (MSFT) is in Cramer's Portfolio.
NEW YORK (TheStreet) -- With Steve Ballmer's reorganization of Microsoft (
MSFT_) now public, it's probably appropriate to, uncharacteristically, give
the wild man some credit.
it's brilliant that he wrote: We will see our product line holistically, not
as a ... 阅读全帖 |
|
n******6
发帖数: 1829 | 27 【 以下文字转载自 JobHunting 讨论区 】
发信人: whaticansay (big), 信区: JobHunting
标 题: 是不是被老印耍了。
发信站: BBS 未名空间站 (Fri Jun 6 19:20:30 2014, 美东)
店面expedia，一接电话听到浓重的老印口音。心里咯噔一下。
第一个问题就是怎么写hash function. 我中规中矩的说用mod，blablabla. 结果被打
断，说我的hash function 不perfect，应该用SHA-1 我当时心里说，完了，没去看SHA
-1啊，谁想到去看这玩意。
然后第二个问题是关于， Collatz conjecture， 如果一个大数字开头，怎么prove或
disprove。 俺吭哧了半天。 无法，只能穷究了。 现在才知道这问题算法上
undecidable.觉得被耍了。
这里跟大家分享下。 唉，碰到老印自认倒霉吧. move on. move on. |
|
M********2
发帖数: 940 | 28 [or search 4 key word "story" in the browser]
I wanted to learn more about the Beijing problem years ago. I figured there
had to be more to the story -- because why wouldn't the pilots want those
routes?
It turns out that the DFW-Beijing route was longer than current union
contracts permitted -- and long enough that even the FAA didn't permit it
without some adjustments (like having additional pilots on board to swap out
during the long duty day).
And so the negotiating began ...
The union DID a... 阅读全帖 |
|
E*V
发帖数: 17544 | 29 http://online.wsj.com/article/SB1000087239639044329490457804687
Huawei's Ally: IBM
U.S. Giant Has Been a Key Partner of Controversial Firm
By SPENCER E. ANTE
Congressional critics allege Huawei Technologies Co. relied on state support
and stolen technology to become the world's second-largest provider of
telecom equipment. Another factor has been crucial to Huawei's rise, say the
Chinese company's executives: IBM IBM -0.87% .
Huawei has long denied claims of bad behavior. But its practices have ... 阅读全帖 |
|
m*********a
发帖数: 2000 | 30 【 以下文字转载自 Mathematics 讨论区 】
发信人: guinea (猪猪), 信区: Mathematics
标 题: 田刚抄袭最新证据（唐纳尔森教授撰文）
发信站: BBS 未名空间站 (Wed Nov 20 21:06:17 2013, 美东)
全文见
Xiuxiong Chen, Simon Donaldson, Song Sun
September 19, 2013
http://www2.imperial.ac.uk/~skdona/KEDEVELOPMENTS-9-19-2013.PDF
部分摘录
Gang Tian has made claims to credit for these results. The purpose of this
document is to rebut these claims on the grounds of originality, priority
and correctness of the mathematical arguments. We acknowledge Tian's many
contributio... 阅读全帖 |
|
C*****H
发帖数: 7927 | 31 It's the mod of the sum of the hour, minutes and seconds by some prime
number...
Goldbach's conjecture ..... |
|
z**********i
发帖数: 9546 | 32 https://bbs.hupu.com/19322389.html
链接有图
--------------------------------------------------
【美国JRs之声】真人真事！都听过乔丹武士刀故事吗？MJ曾冒生命危险挑战大尺度
由 西布杨 发表在虎扑篮球·湿乎乎的话题 https://bbs.hupu.com/vote
How many people know the Michael Jordan samurai sword story? (self.nba)
有多少人知道乔丹和日本武士刀之间的故事？
我之前最先在论坛里发了这个帖子，还以为大多数都知道这个事情，从而会被沉贴。但
是在经过了一些调查后，我发现论坛里好像从来没发过这样的帖子。那么现在我就来具
体说说这件事吧，从这张令人好奇的照片开始。
故事：当乔丹在北卡大学的第一年结束后，一些传道士开始在当地的监狱里做一个特殊
的*河蟹*——这些行为的具体原因未知——但是包括以下几点：
首先让一位名人躺在桌子上
之后在他的肚子上放一个西瓜
然后拿一把日本武士刀来
最后请来一位蒙着双眼的持刀人
用这把武士... 阅读全帖 |
|
m*****j
发帖数: 102 | 33 oh no... speed doesn't make sense to me yet...not to mention you used km...
Just thought 18% for a guy should be perfect... so this must be a skinny
girl who wants to be even skinnier. a conjecture purely out of jealousy. :
-) |
|
t*****g
发帖数: 113 | 34 我的观点: You can have different explanations about facts, but facts are
facts, which deserves respect (maybe the only thing). Do not argue anything
based on conjectures.
The following is the 2nd half.
接下来说说henry.
从技术特点上说,henry是属于全面型的前锋,助攻进球都堪称上乘.在离开摩纳哥后,henry
在尤文度过了并不如意的一个赛季.应该说直到99年转会到阿森那后,henry才真正演变成
一个一流前锋.在到兵工厂之前,henry在法甲和意甲的118场比赛中仅仅进了23球,进球率
仅仅达到19%,应该说作为前锋,并不出色.而到了阿森纳后,henry在138场比赛中,进了82球
.进球比率达到了59%,应该说是非常不错的成绩.综合比较,henry的职业生涯进球比率为41
%,不包括国家队的比赛,而在国家队中,henry在31场比赛中进了10球.
再说说henry的特点,我们应该可以看 |
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s**l
发帖数: 11983 | 35 中国最好的高中锋是董方卓，身体素质中国人里最强，又高又快技术又好，加入过中国
人加入过的最好球队：曼联。虽然就为中国队进了一个球，但是是中国在国际大赛上（
奥运＋世界杯）唯一进球，相当于张益唐的一个twin primes conjecture paper的量级
，为中国人在国际上争光。
董方卓张益唐的故事告诉我们：灌水有个鸟用！！ 沧海横流才是真英雄。
接着是柳海光，为中国队打入88汉城奥运立下赫赫战功。1987年10月26日，中国队在东
京以2比0战胜日本队，历史上第一次“冲出亚洲”——打入奥运会决赛阶段的比赛。身
高186厘米的柳海光是一位传统的中国式中锋，在广州进行的与日本队的主场比赛中，
中国队被日本队以1比0击败；于是决战在10月26日的东京进行。比赛进行到了上半场第
38分钟，近门柱的柳海光接到段举的传球以一记狮子甩头得分为中国队首开纪录，随后
是唐尧东打入第二球，中国队在客场连进两球将日本队淘汰。在赛后，柳海光获得了“
抗日英雄”的称号。谁还获得过这个称号？
排名第三是小王涛。小王涛堪称发挥最稳定的高中锋。小王涛也许职业化以来第一位素
质全面的高中锋，进球数，1994年1... 阅读全帖 |
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l***o
发帖数: 525 | 36 小王涛没在国家队提过几场, 遗憾
按年份来是, 柳海光, 蔡晟/翟飙, 黎兵, 谢晖, 宿茂真, 杨晨, 韩鹏
中国最好的高中锋是董方卓，身体素质中国人里最强，又高又快技术又好，加入过中国
人加入过的最好球队：曼联。虽然就为中国队进了一个球，但是是中国在国际大赛上（
奥运＋世界杯）唯一进球，相当于张益唐的一个twin primes conjecture paper的量级
，为中国人在国际上争光。
董方卓张益唐的故事告诉我们：灌水有个鸟用！！ 沧海横流才是真英雄。
接着是柳海光，为中国队打入88汉城奥运立下赫赫战功。1987年10月26日，中国队在东
京以2比0战胜日本队，历史上第一次“冲出亚洲”——打入奥运会决赛阶段的比赛。身
高186厘米的柳海光是一位传统的中国式中锋，在广州进行的与日本队的主场比赛中，
中国队被日本队以1比0击败；于是决战在10月26日的东京进行。比赛进行到了上半场第
38分钟，近门柱的柳海光接到段举的传球以一记狮子甩头得分为中国队首开纪录，随后
是唐尧东打入第二球，中国队在客场连进两球将日本队淘汰。在赛后，柳海光获得了“
抗日英雄”的称号。谁还获得过这个称号？
... 阅读全帖 |
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f******d
发帖数: 537 | 37 1米9 以上才算高中锋吧
conjecture |
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N*****7
发帖数: 1899 | 38 Can this averaging method avoid an initial mis-specification?
I had thought that the averaging means to reduce the time series
spikiness only.
Can we discuss with an example?
A is really @ 3.75 , and the initial rating is 3.25.
B is a stable 3.5 and has been played 3+ times.
Now A and B plays and it is A's first time into the system.
How does this averaging method help in this situation?
Separately, I conjecture that this initial misspecification's effect
decays at the rate of 0.5^n where n the ... 阅读全帖 |
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N*****7
发帖数: 1899 | 39 以下是假定比赛对手是随机的。如果不是，比如有两个人只是互相比赛，都有的rating
差错。
这个差错只在两人内部平均， 不会随时间降低为零。
Separately, I conjecture that this initial misspecification's effect
decays at the rate of 0.5^n where n the number of times played.
In the example above, the misspecification of 0.5 will carry over to
0.0625 after three matches, which might happen in half a year.
Is this right? I have not used algebra too much lately. |
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N*****7
发帖数: 1899 | 40 Can this averaging method avoid an initial mis-specification?
I had thought that the averaging means to reduce the time series
spikiness only.
Can we discuss with an example?
A is really @ 3.75 , and the initial rating is 3.25.
B is a stable 3.5 and has been played 3+ times.
Now A and B plays and it is A's first time into the system.
How does this averaging method help in this situation?
Separately, I conjecture that this initial misspecification's effect
decays at the rate of 0.5^n where n the ... 阅读全帖 |
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N*****7
发帖数: 1899 | 41 以下是假定比赛对手是随机的。如果不是，比如有两个人只是互相比赛，都有的rating
差错。
这个差错只在两人内部平均， 不会随时间降低为零。
Separately, I conjecture that this initial misspecification's effect
decays at the rate of 0.5^n where n the number of times played.
In the example above, the misspecification of 0.5 will carry over to
0.0625 after three matches, which might happen in half a year.
Is this right? I have not used algebra too much lately. |
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C**********n
发帖数: 45 | 42 我个人反而觉得这步棋非常聪明
绝大多数人并不确定handicap的存在，并且就算相信存在，还是会去花高价买一些很贵
的球员 -- 毕竟这个是fut的乐趣之一。反正至少对我来说，虽然银卡队胜率比别的高
多了，我还是乐意用金卡队玩。
另外大家有没有有的时候输了一场比赛非常郁闷，觉得队里的谁谁不太给力，需要升级
下，于是就一狠心花大价钱搞了张黑卡或者高rating的卡呢？越是有钱人越容易这么干
，所以handicap的结果就是有钱人不停地花钱升级队伍，这样ea赚得才最多。
再说个conjecture：个人猜测黑卡的效果是提升自己，降低队友，这样才让人觉得黑卡
好用。但是黑卡一多，互相降低，就悲剧了。 |
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h*****0
发帖数: 4889 | 43 By a famous conjecture in China we can know that the sum S got is not a even
number. |
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h*s
发帖数: 574 | 44 来自主题: Collectibles版 - 南美邮票 I do not know why you are so mad at this.
What I have said is that there are some widely accepted data belong to
some category are distributed according to Zipf's Law and there are
rational forces behind it. We never said this is also applicable to
stamp prices. What we said is just a simple CONJECTURE! We could be
wrong.
Of course you can even doubt about the former like firm or city sizes,
that's your freedom.
Take a look at the followings:
Gabaix, Xavier (August 1999). Zipf's Law for Cities |
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mb
发帖数: 153 | 45 来自主题: Collectibles版 - 南美邮票 呵呵,首先没有人mad。
仔细看看之前的讨论，是否和你帖子里的话矛盾
We never said this is also applicable to stamp prices.
What we said is just a simple CONJECTURE! We could be wrong.
如果你意识到'We could be wrong.'那么就不要再用zeta分布套stamp price或是
firm size或是穷人和富人收入的distribution。如果在某个特定的假设下的特定
时间里的某个特定的数据符合zeta分布，将这些特定条件列出才是科学的做法。
就像NASA说的几十年来我们分析了几十亿条数终于据找到一条好像有规律的信号。。
虽然这句话啥也说明不了，至少人家的态度是科学的。
下面是之前的讨论：
hbs said:
说得挺好，这个现象在很多领域都存在，比如城市的大小，单词使用频率，
被下载的文件等等，数学上把这种分布叫做Zipf's Law。企业，城市方面
已经有了一些很好的经济学模型解释得不错了。
不知道邮票上有没有点深刻的原因？
hbs said:
但 |
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w***s
发帖数: 15642 | 46 刚刚看到一段挺有意思，借bos的帖子写几句笔记：
赫舍尔在1785年发表了一篇论文"On the Construction of the Heavens"。在这篇论文
里，Herschel对观察和推断有一段论述挺有意思：
“'If we indulge a fanciful imagination and build worlds of our own... these
will vanish like Cartesian vortices.' On the other hand, merely 'adding
observation to observation', without attempting to draw conclusions and
explore 'conjectural views', would be equally self-defeating.”
这段话不就是学而不思则罔，思而不学则殆吗？“vanish”和殆对应得还挺好。文里提
到的Cartesian vortices，原来是笛卡尔提出的一个解释星体运动的理论；笛卡尔生得
早啊，没有万有引力，只好发明带子... 阅读全帖 |
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c**c
发帖数: 2593 | 48 哦，你码过数学家吗？在哪呢？有没有包括Shinichi Mochizuki。那也是神人一个。在
日本出生，在美国长大，16岁进普林斯顿，23岁拿到数学博士，然后回日本教书，本来
也是数学界公认大有前途的天才新秀之一。沉寂多年后，去年他突然在网上贴出一系列
论文，说是证出了ABC Conjecture。那是数论里最重要的猜想之一，如果真地证出来了
，数学里其它一些很难的猜想就会成为自然而然的结果，包括90年代Andrew Wiles吭哧
吭哧证出来的费马大定理。数学界起初感觉就像又碰到了一个Perelman，大为振奋，虽
然看不懂他的这些论文，但希望他能像Perelman当年那样到美国各大学巡回演讲，向数
学界的同事们解释他的理论，回答大家的疑问。结果他老兄拒不接受任何演讲的邀请，
于是那些天书般的论文一直没人能完全看懂。这一点上，他比Perelman当年还倔。
最近两周他老兄又出名了，因为有人猜想他就是Bitcoin的创始人Satoshi Nakamoto。
Bitcoin一直是一套挺牛的虚拟货币系统，当然最近几个月因为各国货币政策都不靠谱
，有不少人觉得Bitcoin反而更靠谱一些，... 阅读全帖 |
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l*r
发帖数: 79569 | 49 看来是notional的，conjectural的 |
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b*s
发帖数: 82482 | 50 而且是theoretical的
看来是notional的，conjectural的 |
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