|
p*********e 发帖数: 201 | 2 1828年在欧洲中部是重要的一年,历史的钢琴制造商Ignaz Bösendorfer在最著名
的奥地利建立了约瑟夫布罗德曼钢琴Joseph Brodmann工作坊,在当时的欧洲和世界认
为是最具创新性和现代钢琴的工厂。
约瑟夫布罗德曼Joseph Brodmann出生于1763年在Deuna / Eichsfeld(今德国图林根州
)。当他还是一位年轻人来到维也纳,在著名的钢琴设计者弗雷德里克霍夫曼为学徒。
这个时候,维也纳已经被认为是世界音乐的中心,莫扎特,贝多芬,舒伯特这些伟大的
音乐家们都是在此诞生的。约瑟夫布罗德曼Joseph Brodmann被视为钢琴设计及手工之
父。于1800 年间,约瑟夫布罗德曼Joseph Brodmann被列为“约瑟夫布罗德曼– 钢琴
仪器制造商,擅长建设音箱板水平fortepianos防止音箱板因长时间经由琴弦的压力而
造成撕裂与分裂” 。 1805年他被法院和国家部门机关认定为钢琴制造商。他的贡献和
发明设计的钢琴,为钢琴制造商奠定了基础,而他最有天赋的徒弟,Ignaz Bö
sendorfer钢琴至今也仍然被认为是世界最优秀... 阅读全帖 |
|
z*****i 发帖数: 41 | 3 11/20: Abel Tasman National Park (Stay at Motueka)
早上起来,随便吃了点东西,按照计划我们到了Abel Tasman National Park,真是个
美丽的地方,我无法控制自己的语言只能不停得说太美了!太美了!受不了了!那样湛
蓝的海水,湛蓝的天空,金色的阳光,沙滩,对我们充满了诱惑。我们到了
Kaiteriteri买好了sea shuttle (海上快艇也叫做水上出租)的往返票,上船准备去
今天的hiking 起点Bark bay。快艇在湛蓝的海水中飞驰,在我们身后卷起一阵阵白色
的浪花,不知道多美的图画。
Bark bay虽然海滩不大,但并不影响它的美丽,很多美女老外已经穿着三点在阳光下曝
晒了,我们当然不会那样,四个人享受了一下阳光的照射,狂拍了几张照片。12点的样
子,四个人慵懒的开始hiking,这里最出名的徒步路线叫做Abel Tasman Track,全程3-
5天,我们时间所限,只打算走其中最美的一段,从Bark bay到Torrent bay,略微感受
一下。Track 很舒服,一边是树木浓密的山林,一边是美丽湛蓝 |
|
m**c 发帖数: 7299 | 4 Shop Fluke ProductsSave on Fluke Products Today. Great Deals on Bulk Qty
. Order Now! MSCDirect.com
Child molestation and pedophilia occur far more commonly among homosexuals
than among heterosexuals on a per capita basis, according to a new study.
Ads by Google
Moore School GraduatesTalent resources to meet your business needs www.
moore.sc.edu
VA Loans for VeteransVA Loans up to $729,000. $0 Down. Veterans, Learn
More & Apply Online www.VAMortgageCenter.com
“Overwhelming evidence s... 阅读全帖 |
|
k****u 发帖数: 1686 | 5 Un giorno, non ha, e sua moglie Eva, la stessa stanza, in stato di
gravidanza ed Eva si asessuale e partorì Caino (cioè, avere il significato
)
, Poi disse: "mentore comunismo così ho un uomo".
2 ha dato vita anche al fratello di Caino Abele. Abel è un pastore, Caino
è quello di fattoria.
3, un giorno, Caino ha preso il terreno per il complesso dedicato alla
fabbricazione dei mentori comunista;
4 Abel anche i primogeniti del suo gregge e grasso di pecora presentati.
Comunista mentore di Abe e la |
|
k****u 发帖数: 1686 | 6 One day, it did not, and his wife Eve, the same room, and Eve themselves
asexual pregnant and gave birth to Cain (that is, get the meaning)
, Then said: "Communism mentor so I've got a man."
2 also gave birth to Cain's brother Abel. Abel is a shepherd's; Cain is to
farm.
3, one day, Cain took the ground for the complex dedicated to the
manufacture of the communist mentors;
4 Abel also the firstborn of his flock and sheep fat presented. Communist
mentor of Abe and his fancy for the objects,
5 jus |
|
C****i 发帖数: 1776 | 7 CHAPTER XVI
Of Good Works
I. Good works are only such as God hath commanded in his holy Word,[306] and
not such as, without the warrant thereof, are devised by men, out of blind
zeal, or upon any pretense of good intention.[307]
II. These good works, done in obedience to God’s commandments, are the frui
ts and evidences of a true and lively faith:[308] and by them believers mani
fest their thankfulness,[309] strengthen their assurance,[310] edify their b
rethren,[311] adorn the profession of the... 阅读全帖 |
|
J*******g 发帖数: 8775 | 8 NET Bible上有一些解释。似乎是说上帝通过先知Noah,诅咒了迦南后代的恶。也就是
上帝已经知道迦南继承了Ham的罪。
而且说Ham所谓的see one's nakedness也许是指性行为。不过,即使是看到人的裸体也
是一种不好的事,而且似乎有可能Ham在想他的弟兄说明的时候,是有些幸灾乐祸的。
显然这段圣经没有提供足够的细节来解决这些疑问。人们只能猜测。
https://net.bible.org/#!bible/Genesis+9:18
9:18-24Evidently Noah became so drunk that he took off all his clothes and
then passed out naked in his tent. There is no explicit indication that Ham
disrobed his father or committed some homosexual act.[348] However, because
the expression “to see one’s nakedness” is som... 阅读全帖 |
|
b********h 发帖数: 2451 | 9 一项新的研究表明,同性恋恋童癖的比例远超异性恋。你既然爱看统计数据,那就好好
看看吧。
Child molestation and pedophilia occur far more commonly among homosexuals
than among heterosexuals on a per capita basis, according to a new study.
"Overwhelming evidence supports the belief that homosexuality is a sexual
deviancy often accompanied by disorders that have dire consequences for our
culture," wrote Steve Baldwin in, "Child Molestation and the Homosexual
Movement," soon to be published by the Regent University Law Review.
Baldwin is the e... 阅读全帖 |
|
b*******h 发帖数: 58 | 10 早在19世纪初,挪威少年天才Abel证明五次方程没有闭合解而一鸣惊人;他所用的证明
方法更是打下了后来抽象代数发展的根基,其重要还远甚定理本身。一百多年后,我国
湖南长沙的中学教师苏家驹难置信Abel之定理,辛苦钻研后得出了与Abel不同的结论,
并给出五次方程的闭合解(求根公式)。该成果发表在当时的科普刊物《学艺》中,其
文中称:“代数的普通五次方程式,为近代数学界认为不能解之的问题。然余终不信其
绝对不可解,数年以来,潜思默索,似得一可解之法。”
该文被时为江苏无锡的杂货铺店员华罗庚所见。华大胆质疑,小心求证,发现苏文有错
,错在其中一个行列式的计算错误,从而推翻了整个论证。他写信给时另一科普刊物《
科学》指出,其信件发表于“读者来信”部分,题为《苏家驹之代数的五次方程式解法
不能成立之理由》。此文被清华教授熊庆来发现。熊惊其之才,请来清华就读,成就后
来的大数学家。
网上略有苏家驹其中生平,称他在中学任教物理、数学三十多年,对学生耐心指导,孜
孜不倦。他熟悉教材,能随时指出某定理、公式或习题所在的页码和行序;背诵时,准
确无误。他教学技巧谙练,在黑板上能信手画出几何图形;学生称颂... 阅读全帖 |
|
s*****V 发帖数: 21731 | 11 找到的貌似后续 4
我们今天从AS定理的远祖开始来考察一下AS定理的世系演化。
平面三角形的内角和等于180度这一定理,不能算是AS定理最早的祖先,但算得是一个
好的祖先代表。
这个简单例子让我们看到了几何体上有代数,三对边夹角之和是个常数。因此,我们知
道无穷多个三角形之所以能归为一类,用边数为3或角数为3来判断都不够好,而是因为
有一个共同的不变量π。这个不变量是几何不变量。
三角形还有别的不变量吗?当然有。大家可以验算一下:边数-顶点数=0对所有三角形
也成立(不许笑!),而且与几何不变量π没有关系。
这个不变数对任意多边形(平面的或立体的)都成立:边数-顶点数=0。有一点点意思
了吧。敏感的同学可能马上看到这个不变数0是由于任意多边形都是一个闭合的东东。
更多一点意思的是,推广到无穷多边形也是成立的,特别是对圆周也成立,虽然边和顶
点已经难以看出来了。
于是我们发现这个不变数0原来是不仅是三角形的,也不仅是多边形的,也不仅是圆周
的,而是任意封闭曲线的性质。任意封闭曲线有一个不变数0。这就是封闭曲线的所谓
拓扑不变量。到这时,我们看不到这个0与边数或顶点数之类的关系,边、顶点、... 阅读全帖 |
|
c***s 发帖数: 70028 | 12 1. John Sperling 以投资盈利大学推动美国的教育事业发展。John Sperling在进入大学前是一名水手,后执教于San Jose 州立大学,在1976年53岁时,John Sperling作出了他人生的一个重要决定,放弃长期的稳定工作,创建盈利性大学Phoenix,直到他73岁时,他创建的教育服务公司The Apollo Group才为人所知。
2. David Duffield 1987年David Duffield,47岁,作为前IBM高管的他,创建了PeopleSoft,2005年被甲骨文收购,2007年,66岁的David Duffield重回商业战场,创建了Workday,与甲骨文在ERP市场展开竞争。
3. Gary Burrell 1989年,52岁的Gary Burrell遇到了以后的合伙人Min Kao ,两人共同创建了Garmin,一个全球定位技术公司,公司最初将目标客户定位在船员和导航上,接下来将产品扩展到汽车导航。Garmin最初的办公室只有一张桌子和两张折叠椅。
4、John Abele 42岁的Abele 在1979年的一场青年足球赛中,遇... 阅读全帖 |
|
s****e 发帖数: 7018 | 13 亚当有多个孩子
一个是放牧的 Abel, 另外一个是种田的 Cain
后来 Abel 杀了 Cain.
这很可能是东方人的最初分歧的翻版。
游牧族就是匈奴人,种田族就是汉族。 |
|
w*********g 发帖数: 30882 | 14 同时质问金龙鱼:
(1)你们对自己加工抗草甘膦转基因大豆生产的金龙鱼转基因大豆油,是否对孟山
都抗草甘膦转基因大豆中必然存在的活的转基因片段进行了检测?
(2)如果进行了检测的话,检测的结果如何?为什么不向消费者告知来自抗草甘膦
转基因大豆的这种转基因片段对人类健康,特别对青少年、儿童、婴儿与孕妇及其胎儿
,造成一系列危害?
陈一文:转基因大豆脂肪酸含量比非转基因大豆的低不利健康
http://blog.sina.com.cn/s/blog_4bb17e9d0102dr56.html
国内学者检测发现:抗草甘膦转基因大豆的脂肪酸含量比非转基因大豆的低。食用
油脂的营养价值较大程度是取决于它的脂肪酸组成及其配比。中国优质非转基因传统大
豆油ω-6和ω-3脂肪酸的含量都较高。国外学者发现:抗草甘膦转基因大豆大量施用草
甘膦导致转基因大豆ω-6和ω-3脂肪酸的含量下降,对健康不利!深圳市计量质量检测
研究院对金龙鱼转基因大豆油的脂肪酸含量,特别是ω-6和ω-3脂肪酸含量,进行检测
了吗?与中国优质非转基因大豆相比的检测结果如何?
“抗草甘膦转基因大豆的脂肪酸含量比非转... 阅读全帖 |
|
n*****3 发帖数: 94 | 15 http://en.wikipedia.org/wiki/Fake_memoirs
(Fake memoirs form a category of literary forgery in which a wholly or
partially fabricated autobiography, memoir or journal of an individual is
presented as fact)
-------------------------------------------------------------------------
List of fake memoirs and journals
Matt McCarthy, Odd Man Out: A Year on the Mound with a Minor League Misfit
Viking (a division of Penguin Group USA) (February 2009) is a memoir
describing McCarthy's summer as a minor le... 阅读全帖 |
|
m**********e 发帖数: 12525 | 16 建议读读下面文章:
http://rmp.aps.org/abstract/RMP/v72/i1/p1_1
如果没权限下载不了可以下面下载:
ftp://orthodox-hub.ru/books/_%D4%E8%E7%E8%EA%E0_%CC%E0%F2%E5%EC%E0%F2%E8%EA%
E0/RevModPhys/RevModPhys%201984-2008/root/data/RevModPhys%201984-2008/pdf/
RMP/v072/RMP_v072_p0001.pdf
看第二页的继承图,这一领域,其实最厉害的是Weyl,Weyl把基础都打好了,1918年weyl
挖的坑,到了80年代supersymmetry的时候还在用丫的架构.
所以这领域其他人其实并不需要特别高深的数学功底,稍微看看paper,了解下别人在
干什么,你很快就知道数学是咋回事情了.
50年代的时候,这圈子里的,谁都知道abel李代数和非abel李代数,你拿来用就是了.不
需要再造轮子 |
|
g**1 发帖数: 10330 | 17 The senior Varadhan was awarded the Abel Prize, considered equivalent to the
Nobel prize and awarded for outstanding scientific work in the field of
mathematics.
他爹得过Abel Prize。
http://en.wikipedia.org/wiki/S._R._Srinivasa_Varadhan
Sathamangalam Ranga Iyengar Srinivasa Varadhan FRS (born 2 January 1940) is
an Indian American mathematician who is known for his fundamental
contributions to probability theory and in particular for creating a unified
theory of large deviations.[1] He is also the Jur... 阅读全帖 |
|
c*******o 发帖数: 8869 | 18 第三个也快了吧,这个新来的给他上眼药呢,肯定是老川的意图。
Scaramucci cranks up the pressure on Priebus
The new communications director references ‘Cain and Abel’ when talking
about their relationship.
White House communications director Anthony Scaramucci on Thursday escalated
his tensions with chief of staff Reince Priebus, recalling the biblical
story of Cain and Abel in reference to their relationship and saying it’s
up to Priebus to prove that he’s not a leaker. |
|
w********t 发帖数: 5586 | 19 1) mostly they are not abel to get ink card
2) even abel to get one 5W/year is a cap easily passed. |
|
t*******e 发帖数: 172 | 20 他的abel奖很难说是根据他再数学上的贡献还是他的社会影响力。他在数学上,单就结
果的震撼性来说比张还是差的远了。
abel prize 是很攸影响力的,但是具体到nash这个例子,也就跟一般的娱乐奖什么的
差不多了。 |
|
j***o 发帖数: 5096 | 21 abel奖对于nash的citation:贡献在于非线性偏微分方程,不是game theory,我不觉
得abel委员会需要去舔一个86岁的疯老头的屁股,传奇科学家世界上多地去了,霍金早
就该得一个诺贝尔安慰奖了按照你的逻辑 |
|
F********d 发帖数: 102 | 22 Made-in-Germany 2009 Brodmann Upright 47” For Sale
• Made-in-Germany 2009 Brodmann Upright 47
• Polished Mahogany finish (pic attached)
• Model: SB121,Serial # 179937
• Tuned once a year and was just tuned this March
• A $300 value piano dehumidifier system installed inside.
• Well maintained in a smoke-free and pet-free home.
• Tone: Very typical European pianos’ sweet sound. Strong in the
base, sweet and singing in the treble. Word... 阅读全帖 |
|
j**i 发帖数: 6 | 23 $895/Mon - A large furnished studio for rent in Fort Lee, NJ
________________________________________
Reply to: j******[email protected] or a******[email protected]
Or Call Abel at: 240-602-8781 (cell)
Lovely large Studio for rent in Fort Lee, NJ
This lovely large Studio is great for Couple or Single. The monthly rent is
$895, available to move in now.
Fort lee is right across the Washington Bridge to Manhattan and it is a
major Asian town in New Jersey. There are tons of Asian supermarkets and
restaurants, |
|
a*****g 发帖数: 19398 | 24 $1,500 will be offered to candidates for positions in areas of critical
shortage.
4:15 p.m. EST, December 28, 2015
KING WILLIAM — The King William County Public Schools is adopting a unique
approach to attracting teachers.
The School Board has agreed to offer $1,500 signing bonuses for some hard-to
-fill teaching positions. Teachers staying in those positions for longer
than five years can earn as much as $3,000 extra in bonuses.
The $1,500 bonus, which were offered last year for math and scienc... 阅读全帖 |
|
p**********u 发帖数: 15479 | 25 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: xxchen (YYUU妈), 信区: SanFrancisco
标 题: Re: 有住在milpitas的么?
发信站: BBS 未名空间站 (Thu Feb 7 19:09:04 2013, 美东)
在那里住了快10年,还挺喜欢的。
狮子城那里是真的很臭,往南到了Abel,或者往东接近山边就好多了
另外city hall附近,还有Abel向西过了铁路桥大下坡的区域是flooding zone
要额外的水灾保险,房子下面可能会潮湿,买房要注意
其他优点真是不少,华人餐馆多,华人超市多,交通方便
过去缺医疗设施,现在也跟上了 |
|
Y*****2 发帖数: 38613 | 26 The Prodigal Daughter is a novel by Jeffrey Archer. It is the story of
Florentyna Kane, the daughter of Abel Rosnovski of Archer's Kane and Abel.
The novel, one of Archer's best sellers, portrays Florentyna's life from
early childhood to her final ascension to the position of President of
United States. In this way, President Kane becomes the first female U.S.
president.
-wikipidia... |
|
j******l 发帖数: 10445 | 27 大器晚成十大亿万富翁 John Sperling上榜(图)
发信站: BBS 未名空间站 (Sun Apr 24 21:35:18 2011, 美东)
1. John Sperling 以投资盈利大学推动美国的教育事业发展。John Sperling在进入大
学前是一名水手,后执教于San Jose 州立大学,在1976年53岁时,John Sperling作出
了他人生的一个重要决定,放弃长期的稳定工作,创建盈利性大学Phoenix,直到他73
岁时,他创建的教育服务公司The Apollo Group才为人所知。
2. David Duffield 1987年David Duffield,47岁,作为前IBM高管的他,创建了
PeopleSoft,2005年被甲骨文收购,2007年,66岁的David Duffield重回商业战场,创
建了Workday,与甲骨文在ERP市场展开竞争。
3. Gary Burrell 1989年,52岁的Gary Burrell遇到了以后的合伙人Min Kao ,两人共
同创建了Garmin,一个全球定位技术公司,公司最初将目标客户定位在船员和导航... 阅读全帖 |
|
|
x****n 发帖数: 2149 | 29 在那里住了快10年,还挺喜欢的。
狮子城那里是真的很臭,往南到了Abel,或者往东接近山边就好多了
另外city hall附近,还有Abel向西过了铁路桥大下坡的区域是flooding zone
要额外的水灾保险,房子下面可能会潮湿,买房要注意
其他优点真是不少,华人餐馆多,华人超市多,交通方便
过去缺医疗设施,现在也跟上了 |
|
F********d 发帖数: 102 | 30 Made-in-Germany 2009 Brodmann Upright 47” For Sale
• Made-in-Germany 2009 Brodmann Upright 47
• Polished Mahogany finish (pic attached)
• Model: SB121,Serial # 179937
• Tuned once a year and was just tuned this March
• A $300 value piano dehumidifier system installed inside.
• Well maintained in a smoke-free and pet-free home.
• Tone: Very typical European pianos’ sweet sound. Strong in the
base, sweet and singing in the treble. Word... 阅读全帖 |
|
w*****y 发帖数: 303 | 31 从阴雨的西海岸出来,山那边的天空湛蓝湛蓝的。因为我们放弃了doubtful sound(天
公不作美),我们便有时间去朋友强烈推荐的Abel Tasman National Park。
一路边走边玩(最后会贴一章“在路上”),下午3点来钟终于到了这片碧海蓝天新西
兰人最喜欢的度假圣地。碧绿碧绿的海水上泛着五颜六色的小船,立刻心痒痒地想租条
船下水。哪知人家做生意的很悠闲,说3点后就不租了,于是只好在海边自己玩了小半
天,比如逗了螃蟹,吓吓小鸟,摆摆贝壳。晚上再美餐一顿,早早睡觉可以早起赶船。
Abel Tasman NP是个没有公路的海滩公园。我们昨天到的不过是公园入口。进去可以徒
步,一天也走不到头。还可以走水路,可以坐水上出租或者自己划船进去。大部分人选
择坐船进到深处,再徒步一段,在另一个上船点坐出租回来。我们太懒不想徒步(呵呵
,登山靴一次也没用上),选了坐船进去,再划船往回3个站,再坐船回来。我表达太
差,大家看看图也许能明白。如果时间多,可以选择全程自己划船,在里面露营几天。
下次我再去,就一定去露营。
好像我们这样选择的很少,因为价钱贵吧,所以整个团就我们两和那个长得酷似 |
|
x*******o 发帖数: 378 | 32 Smale没得过Abel,Abel现在是第一牛奖 |
|
x*****g 发帖数: 3463 | 33 还真有人相信有不知道3+4等于几但是知道Abel群的人?连Abel是啥都不知道吧? |
|
d******0 发帖数: 1598 | 34 作为一个意大利后裔,我小时候当然没少去过downtown的church。在那里你可以见到整
个小意大利区的所有无聊面孔。其中有些家伙,假若你在酒馆里遇见,其实也没那么无
聊,然而一旦进了那个莫名其妙的狗屁地方,他们就开始争着装无聊了。这就是鬼混了
大半辈子的我对church的基本印象。
Absolutely I heard a lot of bullshit from there, but I have to say there’s
still something interesting.
比方说,righteousness is like seed like yeast.可惜的很,我大半辈子也没搞清楚
what the hell’s righteousness. But I do know how the sin looks like. It
looks like seed, like yeast. 就说这次吧,自从Qiang or John说过那句铿锵有力的
kill he,我的脑子就开始翻来覆去地琢磨这事儿。我把各种各样的可能性,实施方案
,甚至是后果,都想了个遍。就这件事情,我... 阅读全帖 |
|
C***r 发帖数: 759 | 35 CHAP. 18.--THE SIGNIFICANCE OF ABEL, SETH, AND ENOS TO
CHRIST AND HIS BODY THE CHURCH.
"And to Seth," it is said, "there was born a son, and he
called his name Enos: he hoped to call on the name of the
Lord God."(2) Here we have a loud testimony
to the truth. Man, then, the son of the resurrection, lives
in hope: he lives in hope as long as the city of God, which
is begotten by faith in the resurrection,
sojourns in this world. For in these two men, Abel,
signifying "grief," and his brother Seth |
|
G******e 发帖数: 9567 | 36 来自主题: TrustInJesus版 - 什么是义? 如果儿子献的礼物不合老爸的意,那还能叫“义”吗?
创世记4:
3 In the course of time Cain brought some of the fruits of the soil as an offering to the LORD.
4 But Abel brought fat portions from some of the firstborn of his flock. The LORD looked with favor on Abel and his offering,
5 but on Cain and his offering he did not look with favor. So Cain was very angry, and his face was downcast.
6 Then the LORD said to Cain, "Why are you angry? Why is your face downcast?
7 If you do what is right, will you not be accepted? |
|
D*****r 发帖数: 6791 | 37 Letters from the Earth
When the Creator had finished thinking, He said, "I have thought. Behold!"
He lifted His hand, and from it burst a fountain-spray of fire, a million
stupendous suns, which clove the blackness and soared, away and away and
away, diminishing in magnitude and intensity as they pierced the far
frontiers of Space, until at last they were but as diamond nailheads
sparkling under the domed vast roof of the universe.
At the end of an hour the Grand Council was dismissed.
They left... 阅读全帖 |
|
J*******g 发帖数: 8775 | 38 举个例子吧:
Genesis 4
8 Now Cain said to his brother Abel, “Let’s go out to the field.” While
they were in the field, Cain attacked his brother Abel and killed him.
Genesis 5
etc. |
|
c****e 发帖数: 2097 | 39
also, it's not that addition is a abel group, but the integers form an abel
group under addition (in the context of the joke) |
|
|
l***o 发帖数: 7937 | 41 http://www.scmp.com/lifestyle/technology/article/1256542/zhang-
No mathematician should ever allow himself to forget that mathematics, more
than any art or science, is a young man's game," the British mathematician G
.H. Hardy wrote in A Mathematician's Apology. But the older guys are now
catching up.
Since Hardy wrote those lines in 1940, it has been conventional wisdom that
mathematical breakthroughs are most often made in a moment of brilliance by
a born genius at a young age, rather than an ... 阅读全帖 |
|
t****n 发帖数: 56 | 42 英文是
Weirstrass approximation theorem
Weirstrass是德国人,当初奠定分析学基础的三大功臣之一,另两个
是Cauchy(法国人)和Abel(挪威人)。在Newton和Lebniz分别发明微积
分以后,当初的微积分运算十分混乱,特别是级数运算,甚至出现
1-1+1-1+1-1+...=0 和 1-1+1-1+1-1+...=1的情况。Cauchy对极限给出
了严格的定义,现在教科书上关于极限的定义以及中学课本上关于函数
的(狭义)定义都出自Cauchy,此外,Cauchy的收敛定理十分著名,还有
他在复变函数论上有杰出的贡献。Weistrass是德国的大数学家,思维十
分严谨,在函数逼近论上以及复变函数论上都有建术。Abel在分析学上
经常采用独特的方法,代数上他第一个证明5次以上代数方程没有通用的
用系数表达的解,但27岁不幸早逝。 |
|
p*********w 发帖数: 23432 | 43 卫报:我们担心“哎喂喂”的命运 zz
Our fears for the fate of Ai Weiwei
http://www.guardian.co.uk/artanddesign/2011/apr/08/our-fears-fa
(后面的名单有点长,铲子要拉人得多准备几辆车。)
We write as a matter of urgency regarding the arbitrary detention of the
Chinese artist Ai Weiwei (Report, 7 April). We and many Chinese and other
friends are very concerned at the Chinese government's behaviour towards its
own citizens. Ai Weiwei's position is that he firmly believes in the
freedom of speech and the right to speak up on behalf of others... 阅读全帖 |
|
e**o 发帖数: 6038 | 44 这人太可恶,来这里勾引一堆鱼儿上沟
FORT BRAGG, N.C. (AP) — Dozens of soldiers at North Carolina's Fort Bragg s
uffered heat-related problems after participating in an early morning march.
Base spokesman Ben Abel said Friday that 37 soldiers required medical treatm
ent. Of those, 13 were taken to Womack Army Medical Center.
One soldier remains in the hospital's intensive care unit.
About 60 soldiers from various units at the sprawling Army base in the south
eastern area of the state set out at about 5:30 a.m. for... 阅读全帖 |
|
E*V 发帖数: 17544 | 45 一年一度的诺贝尔奖公布日期又到了。
假设:自然科学领域的诺贝尔奖得主总数基本上与该国的经济总量成正相关。
我没有时间把过去100 年获得诺贝尔奖的各国人数与GDP总量算出相关性,因为工作量
太大,我又不是这个领域的科研人员。但我把过去十年的诺贝尔奖得主与GDP 相关性查
看了一下,发现我这假设还是有道理的。当然,以色列这样的小国,GDP 总量小但诺贝
尔奖得主多,必然不符合相关性。但这不影响总体趋势的可靠性。
在过去的十年中,中国的GDP 在全世界的排名变化太大,无法放入其中做比较。加上科
学研究的成果与得到诺贝尔奖的后移平均要10 年,我由此推理,得出的结论是:今后
十年中,中国在自然科学领域里的诺贝尔奖得主数应该在10 名左右,这是取代日本的
第二大经济体后的理想结果。
证据:2000-2011 年自然科学领域诺贝尔奖(生理学与医学,物理学,化学)得奖人数
所在国排名:
1. 美 国—— 50 人
2. 日 本—— 9 人
3. 英 国—— 8 人
4. 德 国—— 6 人
5. 法 国—— 5 人
6. 以色列—— 4 人
7. 俄 国—— 2 人
7. 澳大利亚—— 2 人
8... 阅读全帖 |
|
|
s****r 发帖数: 31686 | 47 【 以下文字转载自 Military 讨论区 】
发信人: mifepristone (弃婴), 信区: Military
标 题: 大海航行涉及复杂高深的数学问题
发信站: BBS 未名空间站 (Mon May 1 23:56:42 2017, 美东)
许多屁民根本没这个认识。
因为地球是个球,不是平面,所以,如果借助罗盘或者恒星导航,
就会遇到一个类似现在非对易几何的数学问题。
举个例子,如果从祖国出发,沿西偏南45度到达非洲某地去办事,
等你办完事沿东偏北45度原路返回的时候,你会发现你最后根本
回不了中国。
也就是说,在球面上的定角路径是非对易的。A到B,和B到A是不等
的,大洋航线遵守非Abel李代数。从B原路返回你会发现你根本回不
了A。
要解决这个问题,就必须用conformal映射的地图。
当年如果没有这个认识,郑和是根本回不了祖国的。 |
|
o***s 发帖数: 42149 | 48 我们怎样鼓励孩子学业进步、人生得意?这个基本问题让每一位父母的奔忙有了动力,有多少家庭就有多少答案。《华尔街日报》1月8日书评版发表的新书《Battle Hymn of the Tiger Mother》(虎妈妈的战歌)书摘中,作者蔡美儿(Amy Chua)分享了她有力、坚定的答案。
开头不久,蔡美儿就写道,下面这些事是我的女儿索菲亚(Sophia)和路易莎(Louisa)绝对不允许做的:
·夜不归宿
·小朋友的小组娱乐活动
·参加校园演出
·抱怨没有参加校园演出
看电视或玩电脑游戏
·自己选择课外活动
·成绩拿不到A
·除体育和戏剧外,不能每科拿第一名
·学钢琴或小提琴以外的任何乐器
·不学钢琴或小提琴
蔡美儿说,不必一定是中国人才能当个“中国妈妈”,但必须忽略西方社会中上阶层的大部分育儿理念。西方父母始终强调孩子的自尊,批评孩子也只说些拐弯抹角的、鼓励性的话。而中国父母认为孩子是坚强而不是脆弱的,因此不顾一切地辱骂、加压。
蔡美儿写道,中国妈妈可以对女儿说,“胖妹,减减肥吧”;相反,西方父母只能躲躲藏藏地谈这个话题,说的都是“健康”之类的话,从来不提“胖”字,而他们的孩子到头来还是... 阅读全帖 |
|
c***s 发帖数: 70028 | 49 愚人节前一天,“股神”巴菲特被人“整”了。
大卫·索科尔(David Sokol)——伯克希尔旗下子公司中美能源公司(MidAmerican Energy Holding Company)的董事长,巴菲特最热门的接班人之一,同时也是“股神”最为依赖的“救火队长”,在愚人节前向“股神”递交了辞呈。而这个炒巴菲特鱿鱼的人几周前还与“股神”完成了一笔收购的决策。
为内幕交易辞职?
俗话说得好,人怕出名猪怕壮。身为“股神”的爱将,索科尔现在应该深深体会到了这句中国老话的含义。原本普普通通的辞职,现在却已经成为全球镁光灯追踪的焦点。当然,也理所当然地遭到铺天盖地的质疑和不解。离职消息刚一传出,市场上就有消息称索科尔离职是因为内幕交易,《华尔街日报》援引某知情人士的消息,称SEC(美国证监会) 正在考虑介入调查。伯克希尔·哈撒韦公司的股票因此也于盘中出现了波动。
在索科尔的离职报告中,他这样写道:“我希望能在接下来的职业生涯里,将更多的时间投入到家族事业中,希望可以成立一个可持续发展的企业,这样就可以为我的子孙提供一些机会,并为我所钟爱的慈善事业提供资金支持。”
为了家族事业离开“股神”巴菲特?好... 阅读全帖 |
|