Author Topic: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)  (Read 50123 times)

idiot94

  • Sr. Member
  • ****
  • Posts: 484
每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #15 on: 十月 25, 2004, 08:42:01 am »
LoL ... that is the problem with Beida dudes :D ... Simply no discipline, no group mentality :D .. It should have been I who asked you for her address :) ... (if we were a bunch of Qinghua'ers, we definitely would have kept a whole book of alumni's contact...)

Testpost, actually I asked a friend to check out Teng Jun's email, but he did not get back to me yet. I will let you know if I ever get the answer. :p
In general, the men of lower intelligence won out. Afraid of of their own shortcomings ... they boldly moved into action. Their enemies, ...  thought there was no need to take by action what they could win by their brains. Thucydides, History

aq

  • Newbie
  • *
  • Posts: 1
    • Email
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #16 on: 七月 30, 2005, 02:12:16 am »
Friends,

It's exciting to come across this site! and at midnight I am still reading here.

Glad to know many math guys are here. I had been in math before, and left years ago with some feeling of regret still remaining now.
In real life, it's been many years for me to have someme to chat with about math stuff.

Also, it's nice to know siYue is Wang Feng. I am 86 math, and Wang Feng and Wu Sihao are so well known. If my memory is correct, the news of them attending the 1985 IMO as well as their pictures had appeared in one of the managize: Zhong Xue Sheng Shu Li Hua in 1985. I participated 1985 math winte camp in Nankai University, but was not selected into the IMO training camp.

In 1986 IMO, China had 3 golds and 1 silver and 1 bronze: Fang Weimin, Wang Hao, and Li Pingli, Jing Qin, and Lin Qiang. It seems none of them is still in math?  I guess many math guys around 80s thought very high of themselves, and most of them don't accomplish as much as they expected. Just as the sad story about Mr. Huang Yu tells, sometimes I feel I can understand him very well.

Tried some problems here, and  i feel I am damn slow. Or maybe I used to be at this intelligence level  :-).

I am going to search around my head and see if I can still remember some old problems to share with you.










warren

  • Full Member
  • ***
  • Posts: 148
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #17 on: 七月 30, 2005, 06:14:48 am »
Welcome! Hope you post many interesting problems at this site to amuse friends here.

fzy

  • Hero Member
  • *****
  • Posts: 520
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #18 on: 七月 30, 2005, 02:18:17 pm »
Welcome to 灵机一动, aq! And hope you enjoy the problems and other topics here.

Like the professor, I have never participated any math competitin of any level. I am glad that other than us pretenders, there are real ones like Si Yue and others who frequents the site. (I am sure there are many more at this site like him and you, who just did not share their glorious past with us.)

If you still have contacts with your old friends, please encourage them to visit. We can raise this site to much higher level if more people like you come here to post and solve problems.



777

  • Guest
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #19 on: 十一月 28, 2005, 09:06:37 pm »
WOW.......soooooooooooooooooo many 高手&前辈here!!!!
说起数学竞赛。。。哎,本来在中国一直的梦想就是去IMO集训队的。。。。(参加IMO还没开始想)
自认为还蛮有希望。。。。
可是。。。谁知道还没进高中就到加拿大来了。。。55555555555伤心啊。。。
国际学生不能代表加拿大去比赛的吧。。。。。。
(否则倒是比中国更容易了。。。这里的全国竞赛跳了两级去考都差点满分。哎。。不过大概也和IMO无缘拉)
PS:各位大侠多指教啊!!!(呵呵,现在大概就只能争取加拿大第一了)以后遇到问题的话就靠这里的各位专家咯!^^
(SEEMS LIKE大家都是数学专业的8X届的?呵呵,这样的论坛不多见哦!!!)多关照。。。
(对了,顺便问下,各位能不能推荐下现在美国哪个大学的数学OR理论物理比较强?
我正在考虑去哪读本科的问题。。。个人偏爱MIT。。。虽然知道它的纯理科并不怎么样:P)
« Last Edit: 十一月 28, 2005, 09:20:02 pm by 777 »

idiot94

  • Sr. Member
  • ****
  • Posts: 484
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #20 on: 十一月 29, 2005, 10:07:15 am »
MIT。。。虽然知道它的纯理科并不怎么样:P)

? where did you get that impression? :)  Prof. W is from MIT, he should be able to tell you more :D ...
In general, the men of lower intelligence won out. Afraid of of their own shortcomings ... they boldly moved into action. Their enemies, ...  thought there was no need to take by action what they could win by their brains. Thucydides, History

贼++

  • Full Member
  • ***
  • Posts: 153
    • Email
Re: 提提当年勇
« Reply #21 on: 十一月 29, 2005, 10:10:50 am »
虽说是好汉不提当年勇,但是看到这么多人谈数学竞赛,心里就有些痒:) 再说一直有心联络中国的各届奥赛选手,所以就说两句。

我是1985年去芬兰参加数学奥林匹克竞赛的,那是中国第一次去,有“投石问路” 的意思。惭愧得很,六道题只做出一道半,没拿到牌,而且在一道熟题上失手,事后懊悔不已。同去的只有另外一位选手吴思皓,他得了铜牌。我比吴高一年级,所以说起来我算是中国所有奥赛选手中的老大哥。我中学时的班主任周沛耕后来负责奥校,很有成就。可惜我除了在94年跟他通过一次电话外,没有和他保持联系;回国几次也没能见到他。

那一年我也参加了AHSME,还得了个奖章。当时也是带了遗憾的,因为是憋着拿满分的,但是初试和复试分别错了一题。初试就是各位说的,30个题目,总分150。那复试好像是叫做“美国数学邀请赛”( 那时参加的竞赛太多,名目统统记不住) ,总共十五个题目,每题一分,满分是15分。每个题目的答案都是整数,要填到答题纸上。记得周老师在赛后很遗憾地告诉我,我要是得满分就好了,上海至少有两个满分,而北京一个都没有,不好意思大肆报道:)北京的复试名次也有趣,错几题就是第几名。

我早已脱离数学界,目前做企业级软件。一直希望能把所有中国参加过各种学科奥林匹克竞赛的同学联络起来,了解一下各自的发展情况和奋斗经历,应该会蛮有意思的吧。

关于这个题目,我有个疑问。题目本身并没有限定M和N必须是整数啊。虽然A中提到奇数和偶数,但其他地方说任意M、N,并没有说明任意整数M、N。
周沛耕老师是我妈同事的老公,不过我不是北大附的。我见过张里钊那些人,都是周老师带出来的,一共六七个,长的基本都很高。后来听说他们在北大数学系上课不听讲,坐在后面。我问一个同学“那不懂得怎么办?”他说“这些人上这样低级的课怎么会有不懂的,而且万一不懂讨论讨论不就懂了。”无限敬仰中。

我参加了三次中美数学邀请赛,都达到发证书的级别(对了8道题以上),但只有最后一次(高三)是满分。我们那届高手当时都在集训队,否则会有很多满分的。见过不少数学天才,所以大学决定不学数学。

贼++

  • Full Member
  • ***
  • Posts: 153
    • Email
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #22 on: 十一月 29, 2005, 10:15:22 am »
原来AHSME还有奖章呀?  我参加的那次怎么没有?  因为一块去的有一个是后来奥赛满分拿金牌的,  他肯定在 AHSME中也能得高分 (不过AHSME 总体上太简单了).  可是怎么连复赛都没听说? 有可能我们那次是非正式的吧.

我认为早期没经过多少训练就拿牌的绝对是天才,  后来的其中一些选手就比不上了. 奥赛选手我认识好几个, 不过他们都比SIYUE年轻好多.  他们总体表现当然比其他人好得多.  我大学同学有两个奥赛选手, 都是好朋友.  其中一个早期走过一段弯路,  后来却一帆风顺.  另一个现在的境况很不好, 他其实天分很高的 (一学期课不上, 看三天书就能通过考试). 不过都还年轻,  从新开始念研究生都还来得及.  还有一个当时上研究生的师兄,    也是奥赛拿过牌的,  他不知道为什么刚开始就没想出国,  后来想了, 很费了些劲才出来.   不过这些人就是不一样, 出来了很快就表现出来了.  很多人已经有了很大的成就, 不过那些还在数学圈的, 能不能出个大家, 可能还要等几年才能看清.
上研究生的是姓姚么?如果是,我很想知道他的近况。

万精油

  • Administrator
  • Hero Member
  • *****
  • Posts: 1831
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #23 on: 十一月 29, 2005, 11:04:11 am »
Quote
我正在考虑去哪读本科的问题。。。个人偏爱MIT。。。虽然知道它的纯理科并不怎么样:P)

Where did you get that impression?  I am not from MIT (to correct ID94's remark), but I know as a fact that MIT's mathmatics is very strong. It's been top 5 for many years. If you are also interested in Theoretical Physics,  then, Princeton is the best place to go. It has the best Math and Physics combined. It also has a great campus (much better than MIT).

idiot94

  • Sr. Member
  • ****
  • Posts: 484
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #24 on: 十一月 29, 2005, 12:31:14 pm »
oh... you are not from MIT? prof?  I got the impression since you mentioned that you were in the same class with Tian Gang.
(and in Boston :D )

In general, the men of lower intelligence won out. Afraid of of their own shortcomings ... they boldly moved into action. Their enemies, ...  thought there was no need to take by action what they could win by their brains. Thucydides, History

万精油

  • Administrator
  • Hero Member
  • *****
  • Posts: 1831
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #25 on: 十一月 29, 2005, 01:18:15 pm »
Quote
I got the impression since you mentioned that you were in the same class with Tian Gang

He was a graduate student in PKU, I was a graduate student in Science Academy (Math Inst). Since Math Inst and PKU are close, we often attend each other's courses. Since we were in the same year, naturally, we attended some courses together.

777

  • Guest
Re: 每周一题: 数学竞赛问题 (10/11/04 -- 10/17/04)
« Reply #26 on: 十一月 29, 2005, 06:36:16 pm »
thx~^^
actually i got that impression from Theoretical Physics,
i had only reserched the theoritical Physics...(but now also considering about do maths)
that's why i found Princeton & Haverd r all batter in pure science...
hehe...seems like that's wrong for mathematics :P