Carl Friedrich Gauss

it was GT (T) - its the thumbs up smily from UP! I think! (no I donot think you are mr T! )!

Re: # 74 by iron_mask

I am confused too .... why did you address me as GT(T) in one of your posts? !!!! :)

BTW I am terribly curious - who is Temporal, who is Mrs T and Master T (the nics of the later two)?

I know UP issues should not brought here, but you seem to be well informed.....

#72 totally agree! ;) yes - because we miss out the key ingredient - human emotions whic are present in markets but are not present in most other engineeering or physical systems problems....

you are right....I agre with the complexity part - but not necessarily with the computaional part...it is more an issue of data conditioning than computation. Semantics maybe, but if the data conditioning is not right computationa may as well be left at home.

Re: # 69 by iron_mask

I believe that markets are inherently computationally complex ..... and it will take us decades to understand even an iota of what we claim to understand today. As far as the numerical solutions are concerned, ... they are just a `back-up` to a fat lawyer`s recommendation to the invst. committee :)

stick=stock

based often these on the H-infinity =based often these days on the H-infinity

jang
that is true. However, there is a need to impose a structure on problems and a start has to be made somewhere. For example in general filtering problems there is a difficulty in obtaining ``optial solutions`` if no distributions are imposed. Further you are again restricted in terms of the relationships of variables themselves - if you take gauss other ``invention`` - least squares the independency is crucial.

When this is applied to indetification problems (even using the so called ANNs) you need what are known as open loop stable systems. If they are open loop unstable then you need to stabilise them (often closing the loop) first and then use a complicated RLS on them. This is because of the dependencies and correlations. And the distributions become funny.

GT this is the problem with the stick market as well - essentially they are closed loop systems, and generic identification on them makes your life difficult. IN fact this has been known to people in the avionics area for ages - and they have a whole plethora of tools. This also the reason whhy you never have adaptive systems in avionics, but have the so called Robust Techniques (based often these on the H-infinity approach).

Maybe, the new generation of techqniues based on the wave equations - which you can see being published in Physical letters and other journals - would solve some of these problems. Who knows?

Re: # 67

Jango,

Yaar modern engineering ko rehne do. You have weird theory, generating weird predictions and so the resulting error structure is more than weird! I had to sit through a dissert. defense (as an external) of a civil engineer on eartquake resistant structures, theory followed by `shake-table` experiments. Jeez ... and I had always thought that economists were crazy!

But in general, I agree with you. No one, for example, has been able to cut high frequency financial data to generate normal errors ... so there, more power to you engineers.

i have a personal b!tch against gauss and his distributions. most of the problems in engineering become intractable random numbers with distributions other than guassian. therfore, you need not study them .. i mean life is so easy once you can prove that its a waste of time to figure out some kinda closed-form solution etc. thanks to gauss and other mathematicians who find these patterns of interest amongst otherwise infinite bounty of patterns from allah we have to suffer.

good article mr gill, i must say there was no way a brick-layer`s son could have gotten or strived for a formal education in 18-th century india.

Wow! Iron, GT, Nameless, such interesting posts! It might take a little time to read and absorb everything therein, but the subject is too fascinating to not receive the effort. We non-mathematicians have to work at an intuitive, rather than technical level, so understanding arguments almost right makes the effort worthwhile.

altaf done more for musalmaans in 2 years fool salman rushdie.
altaf bhai we start now camapaign for your knighthood.

Good musalmaans all of you send message to altaf bhai and say you hupporthim for becominign Sir.

Well I am done with these serious topics - off for a long jaunt on the med - starting some near toulose and ending up in turkey.....see you all laterz friends......got to earn my bread

Re: # 60 here is some more information on the 19

19 is a prime number.

19th Nervous Breakdown was a hit for the Rolling Stones in 1966. It reached No 2 in both the UK and USA charts.

Paul Hardcastle`s 19 was a No1 chart hit in the UK in 1985. Although it was about the American war in Vietnam, the single only reached No 15 in the USA charts.

The Nineteen Propositions were demands put to Charles I by Parliament in 1642 intended to limit the power of the Crown. The king`s rejection of them led to the English Civil War and his execution.

To talk `nineteen to the dozen` is to talk `the hind legs off a donkey` or to talk `a blue streak`.

In the game of cribbage 19 is an impossible hand.
19 is a centred hexagonal number. These are numbers which can be arranged into a pattern of concentric hexagons, as in the illustration. There are a series of numbers that can be arranged like this -

7, 19, 37, 61, 91, 127, 169 ...

You will always get a centred hexagonal number if you take a triangular number, multiply it by six and add one.




This pattern of 19 circles is easy to make with coins. It shows that 19 is a `centred hexagonal number`


Check this out Number 19 for more details

........ that was my contribution to mathematics for the week ......... i will be back on friday - got to do my part to keep the american elite in business this week .......... damn !.... i hate work ......... masadi is right - this bs about the protestant work ethic was invented by the wicked elite to keep us toiling while they have fun on chowk ...........

more miracle math :

``Palestinian scholar Ziad Silwadi says the US will cease to exist in 2007. “Silwadi noted that the US has often been compared to a tree that grows very quickly and bears fruit, but has no roots.” He thinks that he found the first allusion to this metaphor in Koran 14:26: “the parable of an evil word is as an evil tree pulled up from the earth’s surface; it has no stability.”
Silwadi noted that Koran 14:26 is the 1776th verse in the Arabic Koran. 1776 is the year that the U.S. declared independence from Britain. Using numerological methods, Silwadi came up with a second number: 231. The details on how Silwadi came up with the 231 number have not been reported in the English press yet—at least to this author’s knowledge. Silwadi added 231 to 1776 to come up with the date 2007 AD. Silwadi thinks the U.S. will be destroyed in 2007``

................. ghaus, eat your heart out !