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全部话题 - 话题: goe
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b*s
发帖数: 82482
1
刚才在路上,说不明白。除了那本书以外,原来在纽约客上Galdwell的文章可以给出详
细一些的例子吧:
http://www.gladwell.com/2008/2008_10_20_a_latebloomers.html
Articles from the New Yorker
Late Bloomers
October 20, 2008Annals of Culture
Why do we equate genius with precocity?
1.
Ben Fountain was an associate in the real-estate practice at the Dallas
offices of Akin, Gump, Strauss, Hauer & Feld, just a few years out of law
school, when he decided he wanted to write fiction. The only thing Fountain
had ever published was a law-review article. H... 阅读全帖
wh
发帖数: 141625
2
来自主题: LeisureTime版 - 【情怀】15个包子的十首歌
响应站方的情怀活动,poiuytre找出十首他喜欢的歌,我负责200字,包子对半分。愿
意贴歌、不想码字的朋友,欢迎联系洽谈业务……
Billy Joel - New York State Of Mind
https://m.youtube.com/watch?v=30yU6CtlWV8
这是jazz?好流畅。我也贴过一首Billy Joel的《And So It Goes》:
“And so it goes, and so it goes
And so will you soon, I suppose”
世间万事,莫不如此。
[윤도현의MUST] 들국화_사&#
45432;라면@윤도현의MUST (活着的话)
https://m.youtube.com/watch?v=-uOF4F9ymng
poiuytre称,他喜欢的歌都是loser听的励志歌曲……词曲积极向上,充满阳光。歌词
翻译附在... 阅读全帖
d********s
发帖数: 1121
3
创造中国歌手历史,最高即时排名51
https://www.youtube.com/watch?v=LgbVkMwv7pc
iTunes:
https://itun.es/us/NwErfb
Follow Jane Zhang:
▶Instagram:
https://www.instagram.com/j_a_n_e_zhang/
▶Facebook:
https://www.facebook.com/JaneZhangLY/
▶Twitter:
https://twitter.com/JaneZhangLY
▶Weibo:
http://weibo.com/zhangliangying?topna...
【Dust my shoulders off】
Lyric:Jim Beanz、Kirby、Jane Zhang
Composers:Jim Beanz、Timbaland
Producers:Timbaland、Jim Beanz
Verse I
Just had a bad day
Had car trouble on the h... 阅读全帖
B**********y
发帖数: 3855
4
来自主题: LeisureTime版 - 周末故事-乐透奖
在哪个楼里看到有朋友回帖说外星人和猪的比喻,与多年前读这个故事,有点相似的
味道。
夏季炎热,读一读也不错。
The Lottery By Shirley Jackson 乐透奖
The morning of June 27th was clear and sunny, with the fresh warmth of a
full-summer day; the flowers were blossoming profusely and the grass was
richly green. The people of the village began to gather in the square,
between the post office and the bank, around ten o'clock; in some towns
there were so many people that the lottery took two days and had to be
started on June 26th. but in this village, where t... 阅读全帖
S***d
发帖数: 1802
5
Higher ranked are mostly genre movies.If u don't like genre shows, u won't
agree with the ranking here.
http://www.imdb.com/list/2KPGc_OIRYU/
1.
Add to Watchlist
Captain America: The First Avenger (2011)
-/10
After being deemed unfit for military service, Steve Rogers volunteers for a
top secret research project that turns him into Captain America, a
superhero dedicated to defending America's ideals.
Director: Joe Johnston
Stars: Chris Evans, Hugo Weaving, Samuel L. Jackson, Stanley Tucci
I... 阅读全帖
t*******r
发帖数: 22634
6
说明:
1)唱到最后有点忘乎所以,不过 jazz 这种 one-take 的,
也不太好控制。由着性子算了。
2)不知道是不是唱成了 “a thigh is just a thigh”。。。
3)小感冒久矣,不过小歌无所谓。另外破嗓唱 jazz 正好!
4)后期还是压缩混响两板斧。。。快糙猛不是盖的。。。
http://www.box.com/s/b2gpnll7d26avfakezaq
歌词:
You must remember this
A kiss is still a kiss, a sigh is just a sigh.
The fundamental things apply
As time goes by.
And when two lovers woo
They still say, "I love you."
On that you can rely
No matter what the future brings
As time goes by.
Moonlight and love songs
Never out of date.
Hearts full of ... 阅读全帖
L********n
发帖数: 1941
7
来自主题: Music版 - 【翻唱】LaziDragon - Bubbly
昨晚上新录的哈,难得唱首欢乐小曲儿 :D
one take
"Bubbly"
Will you count me in?
I've been awake for a while now
You've got me feelin' like a child now
'Cause every time I see your bubbly face
I get the tingles in a silly place
It starts in my toes
And I crinkle my nose
Wherever it goes
I always know
That you make me smile
Please stay for a while now
Just take your time
Wherever you go
The rain is falling on my window pane
But we are hiding in a safer place
Under covers staying dry and warm
You give me feelings tha... 阅读全帖
wh
发帖数: 141625
8
来自主题: MyActivity版 - 【情怀】15个包子的十首歌 (转载)
【 以下文字转载自 LeisureTime 讨论区 】
发信人: wh (wh), 信区: LeisureTime
标 题: 【情怀】15个包子的十首歌
发信站: BBS 未名空间站 (Tue May 3 16:50:40 2016, 美东)
响应站方的情怀活动,poiuytre找出十首他喜欢的歌,我负责200字,包子对半分。愿
意贴歌、不想码字的朋友,欢迎联系洽谈业务……
Billy Joel - New York State Of Mind
https://m.youtube.com/watch?v=30yU6CtlWV8
这是jazz?好流畅。我也贴过一首Billy Joel的《And So It Goes》:
“And so it goes, and so it goes
And so will you soon, I suppose”
世间万事,莫不如此。
[윤도현의MUST] 들국화_사&#
45432;라면@윤... 阅读全帖
o**s
发帖数: 3412
9
来自主题: PhotoGear版 - Lee filter newbie question
Thanks for the reply!
What is 挂历?
So the step ring goes on the 72mm lens, and the lee adaptor 77mm goes on the
step ring, and the filter holder goes on the adaptor? Lord...
I am thinking of getting the following to start with:
-Lee FK filter holder
-adaptor ring 77mm
-ND grads 4X6, 0.9 hard and 0.6 soft
any thought?
Thanks so much!
r*********e
发帖数: 29495
10
Music Heaven 美好的回忆
音乐天堂1~36的目录 Music Heaven Vol.1~Vol.362007-04-16 14:01Music Heaven Vol
.1
1 Everything I Do, I Do It For You - Bryan Adams
2 Pretty Woman - Ronan
3 Windflowers - Seals & Crofts
4 Rush Rush - Paula Abdul
5 I'd Love You To Want Me - Lobo
6 Black Or White - Michael Jackson
7 Tears In Heaven - Eric Clapton
8 Save The Best For Last - Vanessa Williams
9 Seasons In The Sun - Terry Jacks
... 阅读全帖
t**********e
发帖数: 220
11
来自主题: Rock版 - VU 45th Anniversary今天出炉
顺便贴下另一个Matrix live版本的what goes on (Best live version),来自 <1969
live>
期待
Disc 5: Live at The Matrix
01 I'm Waiting for the Man (unreleased)
02 What Goes On (unreleased)
03 Some Kinda Love
04 Over You (unreleased)
05 We're Gonna Have a Real Good Time Together (unreleased)
06 Beginning to See the Light
07 Lisa Says
08 Rock & Roll
09 Pale Blue Eyes (unreleased)
10 I Can't Stand It Anymore (unreleased)
11 Venus in Furs (unreleased)
12 There She Goes Again (unreleased)
Disc 6: Live at The Matrix
01 Si... 阅读全帖
d********s
发帖数: 1121
12
创造中国歌手历史,最高即时排名51
支持中国歌手,支持好音乐!
https://www.youtube.com/watch?v=LgbVkMwv7pc
iTunes:
https://itun.es/us/NwErfb
Follow Jane Zhang:
▶Instagram:
https://www.instagram.com/j_a_n_e_zhang/
▶Facebook:
https://www.facebook.com/JaneZhangLY/
▶Twitter:
https://twitter.com/JaneZhangLY
▶Weibo:
http://weibo.com/zhangliangying?topna...
【Dust my shoulders off】
Lyric:Jim Beanz、Kirby、Jane Zhang
Composers:Jim Beanz、Timbaland
Producers:Timbaland、Jim Beanz
Verse I
Just had a bad day
Had car tr... 阅读全帖
s*********y
发帖数: 6151
13
来自主题: TVChinese版 - bangbang的歌词
就是欺负广电老头老太太土包子,这篇满是性暗示的歌能让上电视才怪。 尼玛连胸
都不让露沟 能让你唱She got a booty like a Cadillac???
同时好奇中文字幕怎么打
She got a body like an hourglass
But I can give it to you all the time
She got a booty like a Cadillac
But I can send you into overdrive
(You've been waiting for that, step on up, swing your bat)
See, anybody could be bad to you
You need a good girl to blow your mind, yeah
Bang bang into the room (I know you want it)
Bang bang all over you (I’ll let you have it)
Wait a minute let me take you there (ah)... 阅读全帖
g****g
发帖数: 1828
14
来自主题: WaterWorld版 - Which pocket do you put your wallet in?
Straight Dope Message Board > Main > In My Humble Opinion > Which pocket do
you put your wallet in?
PDA
View Full Version : Which pocket do you put your wallet in?
Rodgers01
02-20-2006, 12:39 AM
I have always, always kept my wallet in the front, right hand pocket of my
pants (I am male). It seems to me to be simply the most logical place: it is
typically the biggest pocket, allowing the wallet to slide down a bit more,
leaving less chance that it will be pick-pocketed. When you're in a crowded
r... 阅读全帖
d*********o
发帖数: 366
15
来自主题: Joke版 - Racial Jokes
Just got out of prison after attacking a man on New years eve;
excuse me for getting nervous while an Arab was counting down from ten.

How do you remove one thousand flies in one motion?
Slap a Kenyan in the face.

A white guy goes into a bar and sees a black bartender.
He says, "yo, nigger, get me a beer!"
The bartender says, "that's very rude. How would you like it if I talked to
you like that?"
The white guy says, "let's switch places and see!"
So they switch places.
The bartender says, ... 阅读全帖
s********r
发帖数: 2308
16
来自主题: Joke版 - 咏春拳
原视频里老美的comment:
[–]xDskyline 98 points 4 months ago
Spends years doing Wing Chun drills to hone hand to hand combat skills
Is accosted by muggers in dark alley
All my preparation has come down to this moment
Goes in for kiss on the cheek
Fuck
[–]complex_reduction 13 points 4 months ago
Goes in for kiss on the cheek
Mugger is stunned
Offer a hug
Mugger hugs you, renounces his villainy, goes back to college and cures
cancer
x****o
发帖数: 21566
17
来自主题: Joke版 - 一张图,向2014说再见
Here is a full list of items included in the collage. How many can you
identify?
The Guardians of the Galaxy
The LEGO Movie
Gone Girl
The Grand Budapest Hotel
Boyhood
The Fault In Our Stars
Interstellar
Godzilla
South Park mocks Lorde’s ubiquity
Ellen’s Oscar selfie
Lupita Nyong’o wins Oscar
Taylor Swift has first platinum album of the year
Iggy Azalea and Charli XCX [“Fancy”]
Pharrell Williams
New U2 album goes to 500 million iTunes accounts
Meghan Trainor [“All About That Bass”]
Sam Smith
Nick... 阅读全帖

发帖数: 1
18
来自主题: Joke版 - 女人的确是nonsense
#1 is quite LOL...
# 2 somehow can have a at least making sense argument.
if overall economic goes up, wages goes up, then price will generally goes
up too.
so for the same 500 社安金, the buying power is less.
claiming 她钱不够花,床铺偷了她的钱 is somewhat not totally wrong.
s********l
发帖数: 334
19
哈哈,跟我们家狗开始时一样.发生过孩子溜狗时被拽着狂跑了两个blocks回到它的
sweet spot方便的情况.后来是我专挑它方便的时候带它出去,然后忍受它在绳子的另一
头来回狂奔几十次,然后实在忍不住了方便,然后鼓励.终于明白走在外面,草地上是可以
随便方便的.
但跟你们家狗一样,在自己家的院子还是定点(一片树下).我们家领导坚持认为这是优点
,不肯纠正.如果你允许狗在自己家院子里随便拉撒,下面是我的breeder支的招.
...if you want to fix it. I wouldn't allow her to pull you to the spot, but
the fact she goes in one spot is something I think I'd like. I'd just take
her to it before and after playtime.
... But if you get a portable pen ( at least 48 inches high) and you set it
up wherever you'd li... 阅读全帖
L******p
发帖数: 10
20
来自主题: Whisper版 - If it happens, it happens.
It's all like destiny.
Just follow the new tide of love and ride and ride and ride.
It goes, goes and goes that I can't really retain one single moment.
What can be retained is thre bottle of the beer instead of beer.
So I can still feel her in the air but not her for now.
Even when I have her in my arms, it's the body not the soul that I feel.
But I took it as the soul.
y****m
发帖数: 1322
21
来自主题: Whisper版 - going home-zelmani
♫ GOING HOME ♫
Not very often have we met
But the music's been too bad
Can only sense happiness
if the music is sad
So I'm going home
I must hurry home
Where a life goes on
We're too old to make a mess
Dreams will keep me young
Old enough to stress
Only mirrors tell the time
So I'm going home
I must hurry home
So will my life go on
Yes I'm going home
Going home alone
And your life goes on
So I'm going home
I must hurry home
So will my life go on
Yes I'm going home
Going home alone
An... 阅读全帖
T*****n
发帖数: 2456
22
来自主题: Belief版 - 第五节 宗教大法官
THE BROTHERS KARAMAZOV
By Fyodor Mikailovich Dostoevsky
Translated by Constance Garnett
Chapter 5
The Grand Inquisitor
https://www.mtholyoke.edu/acad/intrel/pol116/grand.htm
"EVEN this must have a preface- that is, a literary preface," laughed Ivan,
"and I am a poor hand at making one. You see, my action takes place in the
sixteenth century, and at that time, as you probably learnt at school, it
was customary in poetry to bring down heavenly powers on earth. Not to speak
of Dante, in France, cle... 阅读全帖
g*******s
发帖数: 2828
23
i am having problems with mitbbs both in firefox and IE. basically if i
leave a window open for a while, CPU usage goes up to 50%+, and firefox/IE
grinds to a halt. after i close the mitbbs tab, the cpu usage goes down.
the problem goes away when i turn script filter on in firefox, but it is a
pain in the bud to navigate different boards in that setting.
anyone else has this issue? relatively new problem.
w********h
发帖数: 12367
24
来自主题: Reader版 - Antichrist: A Discussion
Antichrist: A Discussion
Posted In Featured,Web Exclusives
Dense, shocking, and thought-provoking, Lars von Trier’s Antichrist is a
film which calls for careful analysis. This web-exclusive exchange between
Film Quarterly editor Rob White and philosopher Nina Power is meant as a
first attempt at the in-depth debate that this major film deserves.
SPOILER WARNING: Please be aware that the piece assumes familiarity with
Antichrist and does contain major plot spoilers. For ease of reference, a
synop... 阅读全帖
l***a
发帖数: 5114
25
来自主题: SciFiction版 - 阿西莫夫太节棍了!
最近翻出阿西莫夫作品全集来重看,真挺有意思的,不仅囊括了他最早期那些名不见经
传的短篇,还有自己写的“创作感想”。看到TRENDS那一篇,居然发现他在1938年(当
时他还在读大学)成功预测成两件事:1)1940年第二次世界大战,2)1970年,人类登
月。
两件事都只差1年而已!
我一直觉得那个SF黄金时期的创作高峰,后来者很难翻越……
下面附TRENDS 的原文。
TRENDS
John Harman was sitting at his desk, brooding, when I entered the office
that day.
It had become a common sight, by then, to see him staring out at the Hudson,
head in
hand, a scowl contorting his face—all too common. It seemed unfair for the
little bantam
to be eating his heart out like that day after day... 阅读全帖
D*****r
发帖数: 6791
26
来自主题: TrustInJesus版 - For the Liberty of Unlicenc'd Printing
A SPEECH OF Mr. JOHN MILTON
For the Liberty of VNLICENC'D PRINTING,
To the PARLAMENT of ENGLAND.
______________________________________________________________
This is true Liberty when free born men
Having to advise the public may speak free,
Which he who can, and will, deserv's high praise,
Who neither can nor will, may hold his peace;
What can be juster in a State then this?
... 阅读全帖
D*****r
发帖数: 6791
27
来自主题: TrustInJesus版 - 诺贝尔奖得主比昂松的名言
http://www.gutenberg.org/files/37726/37726-h/37726-h.htm
IN GOD'S WAY
SCHOOL-DAYS
I.
In the melting snow on the hill-side by the sea, in the last rays of the
evening sun, stood a boy of fourteen, awestruck. He looked toward the west,
out across the sea; he looked toward the east, over town and shore and the
broad hills; in the background still higher peaks rose far away in the clear
sky.
The storm had lasted a long time; it had been more terrible, too, than any
the old people could remember. In ... 阅读全帖
o*****s
发帖数: 1445
28
because companies work in this way, here is what happens:
they spin off their us division of API manufacturing facility to China, in
order to lower their effective tax rate.
If you read the US tax code, or you ask Jingsuanzi to explain, you will find
the tax rate is crazy. It is as crazy as the AMT rate on a typical Chinese
family with two incomes.
What those company did is: they send jobs oversea to follow a tax loophole.
On the opposite of Obama/democratic government, not only they lose tax fr... 阅读全帖
o*****s
发帖数: 1445
29
because companies work in this way, here is what happens:
they spin off their us division of API manufacturing facility to China, in
order to lower their effective tax rate.
If you read the US tax code, or you ask Jingsuanzi to explain, you will find
the tax rate is crazy. It is as crazy as the AMT rate on a typical Chinese
family with two incomes.
What those company did is: they send jobs oversea to follow a tax loophole.
On the opposite of Obama/democratic government, not only they lose tax fr... 阅读全帖
h*********o
发帖数: 19006
30
来自主题: PKU版 - Casablanca
I fell in love with you watching Casablanca
Back row of the drive in show in the flickering light
Popcorn and cokes beneath the stars became champagne and caviar
Making love on a long hot summers night
I thought you fell in love with me watching Casablance
Holding hands 'neath the paddle fans in Rick's Candle lit cafe
Hiding in the shadows from the spies. Moroccan moonlight in your eyes
Making magic at the movies in my old chevrolet
Oh! A kiss is still a kiss in Casablanca
But a kiss is not a ki... 阅读全帖
x*********n
发帖数: 28013
31
来自主题: EmergingNetworking版 - 发一个J家的电面吧。
谢谢大猫猫refer。
直白的问题就一个:
IBGP VS eBGP, why we need full mesh on iBGP
剩下的都是情景题。
RR, confederation,
at confederation, if sub-AS pass to another, sub-AS, will BGP attribute pass
or not?这个要我回答是or不是,我不太确定,就说sub AS的information应该是独立
的,不应该传给别人,他问我为啥这么想,我说传给别人了是不是要loop了啊?当时好
紧张,好混乱,寒风习习的,心那个凉啊。
router reflector, 2 group, 3 client, how packet goes from client1 to RR,
then RRA to RRB, then ....then what would happen, ( drop) what RRA do when
RRB send back, (Cluster-ID)基本上就是要我一步步的往哪里走,只有前面2步我貌似
走对了,他说correct,后... 阅读全帖

发帖数: 1
32
if box has AV out, so simple...
yellow i think it's vdo? connect to TV.
red + white goes to mixer, mic goes to mixer, then mixer red + white goes to
功放.
n***y
发帖数: 1675
33
来自主题: Accounting版 - CPA exam question on FAR Asking for help.
I am reviewing my FAR material, going to take it in a week:
formula: Comprehensive Income = Net Income + Other Comprehensive Income
Per Becker book:
I - net Income -I/S
D - Discontinued - I/S
E - Extraordinary - I/S
A - Accounting changes - goes into Retained Earnings (RE)
Other Comprehensive Income = PUFER
P = Pension adjustment
U = Unrealized gain/loss for available for sale securities
F = Foreign currency translation gain/loss
E = Effective portion of cash flow hedges
R = (IFRS only) revaluat... 阅读全帖
t*d
发帖数: 1290
34
来自主题: Biology版 - the Real Cost of Sequencing
http://www.genomeweb.com//node/980559?hq_e=el&hq_m=1103092&hq_l
----------------------------------------
A recent study by scientists at Yale University suggests that the actual
cost of sequencing may be much higher than some current estimates indicate
since those figures may not factor in the analysis costs that are necessary
for a successful sequencing project.
In the paper, published in Genome Biology last month, Yale's Mark Gerstein
and colleagues consider costs that weren’t taken into accou... 阅读全帖
f*****0
发帖数: 489
35
来自主题: EE版 - NCP1402一问
"当chip不工作时,内置FET不工作,外面那个电感saturate,怎么可能还有输出。"
when the chip is disabled, the gate goes low, and the drain goes high
impedance. When that happens, the current goes through the inductor and the
diode to the load.
another way to look at it: notice that the Out pin supplies Vdd for the chip
and is connected to Vout? if Vout went low when the chip is disabled, how
would the chip have started?
BTW, the chip can be easily converted to a gated PFM regulator, aka LT1073
style.
m*********s
发帖数: 368
36
来自主题: Mathematics版 - [合集] One problem about Uniform Convergence
☆─────────────────────────────────────☆
okla (ok 啦) 于 (Thu Jul 28 18:05:45 2005) 提到:
This is about one of the argument in Alfors' <>.
In sec 2.1 of chap 5, Alfors tried to prove that
\sum 1/(z-n)^2 goes to 0 uniformly as |y| goes to infinity, where the sum is
for n goes from negative infinity to infinity.
He reasoned like this,
(1) The series \sum 1/(z-n)^2 converges uniformly for |y|>=1
(2) By (1), we can take limit term by term, so ...
My question is, how to prove (1)? T
f*******w
发帖数: 1243
37

n.
It is still difficult to understand... although in each dimension the length
is really tiny, but there are infinity dimensions... can we said that when
n goes to infinity, the ball eventually goes to a point?
But that point does not have a volume? In mathematical point of view, that
is true
since the equation shows that. Intuitively, we are shrinking the diameter
but at the same time we increase the dimensions. It is still unclear for me
why it goes to zero.
Also, how can we explain there is... 阅读全帖
f*******w
发帖数: 1243
38

n.
It is still difficult to understand... although in each dimension the length
is really tiny, but there are infinity dimensions... can we said that when
n goes to infinity, the ball eventually goes to a point?
But that point does not have a volume? In mathematical point of view, that
is true
since the equation shows that. Intuitively, we are shrinking the diameter
but at the same time we increase the dimensions. It is still unclear for me
why it goes to zero.
Also, how can we explain there is... 阅读全帖
E*****T
发帖数: 1193
39
My question is: for any increasing function g, does there exist a
differentiable increasing function f>g such that and f'/f^2 goes to 0 as x
goes to infinity? In your example, f'/f^2 goes to 0.
d******0
发帖数: 296
40
来自主题: MedicalCareer版 - CS_FA case 1 practice protocol
Case 1
Opening scenario:
Sharon Smith, a 48-year-old female,comes to the clinic complaining of
abdominal pain. Married with four children.
Vital signs:
BP:135/70 mmHg
Temp:98.5 F
RR:16/minute
HR:76/minute, regular
Protocol:
Knock three times with confidence, a smile, walk in and say:
Good morning, Ms Smith. I am Dr. Dora, and I am here to see you today as
your physician. Nice to meet you .Shake hands. Is everything in the room
alright for you? Let me cover you with this to make you a little m... 阅读全帖
m******r
发帖数: 1904
41
来自主题: MedicalCareer版 - [合集] CS_FA case 1 practice protocol
☆─────────────────────────────────────☆
dora2010 (dora) 于 (Wed Feb 29 16:55:46 2012, 美东) 提到:
Case 1
Opening scenario:
Sharon Smith, a 48-year-old female,comes to the clinic complaining of
abdominal pain. Married with four children.
Vital signs:
BP:135/70 mmHg
Temp:98.5 F
RR:16/minute
HR:76/minute, regular
Protocol:
Knock three times with confidence, a smile, walk in and say:
Good morning, Ms Smith. I am Dr. Dora, and I am here to see you today as
your physician. Nice to meet you .Shake ha... 阅读全帖
r**u
发帖数: 69
42
来自主题: Quant版 - 问一个问题:有关swaption
i think the answer is a).
here is my reason. when you sell receiver swaption, you give the counterparty the option to receive fixed rate at strike. when swap rate goes down below strike, the counterparty would exercise to receive the strike, paying you float. hence, you loose money when rate goes down.
to hedge this, you need to buy option where you make money when interest rate goes down, which is the call on EDF.

a
this
w*****e
发帖数: 197
43
Perpetual American Call Option under Zero Interest Rate
This is actually a homework problem from Mark Joshi's famous book.
If we strcitly follow BS formula
C = S*N(d1) - K*exp(-rT)*N(d2)
When T goes to +infinity, d1 goes to +infinity and d2 goes to
-infinity, so we get C = S.
But here comes a replication based method, which shows that C should
be worth no more than S - K.
We can always borrow K in cash and long a share and short a perpetual
american call. Note, we have completely hedged our risk
i**w
发帖数: 71
44
Rigorous proof can be found in Shreve II. But it helps to understand the
discrete version: random walk.
Consider for now a barrier a=1 for a symmetric random walk. Within 2m steps,
around O(1/sqrt(m))of all paths never hit the barrier or X_i < 1 for all i<
=2m.
Given this claim, P( Ta <= 2m ) ~ 1 - O(1/sqrt(m)) approaches 1 as 2m goes
to infinity. In the mean time, E(Ta) > 2m*O(1/sqrt(m)) approaches infinity
as 2m goes to infinity.
Now proof:
1. Given 2m steps, there are a total of 2^(2m) paths,... 阅读全帖
l******i
发帖数: 1404
45
It is very natural to use Levy here.
B_t has continuous paths means for any fixed u>0,
B_t-B_u converges to 0 in mean square sense as t goes to u.
Suppose t>u,
\int_u^t norm(sign(W(s)))^2 ds<=\int_u^t ds=(t-u)
, which goes to 0 as t goes to u.
b********e
发帖数: 74
46

Eurodollar future is mark to market daily. If you are long ED, when rate
goes up, you lose money so need to post margin. When rate falls, you get
credit in your account but unfortunately your return for the credit
reinvestment is lower since we are in lower rate environment. We pay when
rate goes up and we get back when rate goes down. So in some sense there is
negative convexity. ED investor will be compensated by letting future rates
to be above corresponding forward rate (from FRA). This is ... 阅读全帖
c****u
发帖数: 584
47
来自主题: Science版 - negative temperature?

1/T=dS/dE. that is the definition of the temperature. When the system is the
energy bounded system which means the system's energy can't goes to infinite,
such as magnet system, when you keep heating the system, you increase the
entropy by increasing the energy, however when you increase the temperature to
infinite,the system can't gain more entropy, since all particles tends to go to
the highest state. At that time temperature will goes to negative and goes to
negative zero, when all particles
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