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Type: Posts; User: Sang-drax

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  1. Replies
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    He he he, did you know that the Chairman and...

    He he he, did you know that the Chairman and President of isocpp.org is Herb Sutter from Microsoft? :D
  2. If you decide to fly with Linux Air you should be...

    If you decide to fly with Linux Air you should be very careful. Never use the newly-opened routes.
    Ubuntu 11.04 Is Buggy..Even the Fanboys Agree.... - comp.os.linux.advocacy | Google Groups
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    All my main() functions look the same: int...

    All my main() functions look the same:


    int main(int argc, char** argv)
    {
    using namespace std;
    try {
    return main_program(argc,argv);
    }
    catch (runtime_error& e) {
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    You have been reading too much on Wikipedia. No...

    You have been reading too much on Wikipedia. No one is using those constructs for anything serious. :)

    What's going on here? You started out by asking in post #30

    "Isn't it self-evident that...
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    That rule is obviously correct and although I...

    That rule is obviously correct and although I don't use it per se, I use properties of the real numbers to ensure that the limit exists.

    0.999... = sum(k=1...oo)9 * 10^(-k) = 1.

    is a perfectly...
  6. Replies
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    I think many here complicate things too much. A...

    I think many here complicate things too much. A correct proof is:

    0.999... = sum(k=1...oo)9 * 10^(-k) = 1.

    The first equality by definition and the second one by using the geometric sum formula...
  7. Replies
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    Your view is correct. 0.999... is by definition...

    Your view is correct. 0.999... is by definition (or: unprovable axiom) equal to lim(n->oo)sum(k=1...N) 9/10^(-k).

    I'd be interested in such a demonstration, however. What did you have in mind?
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    From this and other quotes I draw the conclusions...

    From this and other quotes I draw the conclusions that you view "0.999..." as some kind of process. It is not. It is a number.

    Many posts ago you said that "0.999..." is rational. Well then, can...
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    EDIT: I see that you agree with me in a post...

    EDIT: I see that you agree with me in a post above.


    Then what is the definition of 0.(9)?
  10. Replies
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    You don't argue in math. You need to have a clear...

    You don't argue in math. You need to have a clear definition of the concepts you are using.

    As for your example, if f(x) -> oo and g(x) -> oo , we still cannot say much about f(x)/g(x). The...
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    Now I almost think you're trolling. To me, it is...

    Now I almost think you're trolling. To me, it is obvious that a thorough understanding of floating point number beyond "if you want accuracy, don't use floating point numbers" can be very useful.
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    Learning about binary representation of fractions...

    Learning about binary representation of fractions is very important to understand the nature of IEEE floating points. What fractions can be represented exactly? When do we get round-off errors?
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    I seriously doubt that, considering that you...

    I seriously doubt that, considering that you bought it in 2007. XP was released in 2001 and usually got infected with Code Red within half an hour after an Internet connection + IIS was activated.
  14. Thread: P != np

    by Sang-drax
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    This is a serious attempt. Several experts have...

    This is a serious attempt. Several experts have expressed their enthusiasm. A Proof That P Is Not Equal To NP?

    Even if the proof contains a mistake, there is probably still new ideas left in the...
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    That is actually less true since a couple of...

    That is actually less true since a couple of years ago. Matlab now comes with a Just-in-time compiler which compiles for-loops no native code and achieves decent execution speeds.
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    I'd say learn Matlab first. That way, you will...

    I'd say learn Matlab first. That way, you will get more immediate benefits for the applications you have in mind.
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    SpaceX – A Free Shoot'em Up...

    SpaceX – A Free Shoot'em Up
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    The participants will have the option of writing...

    The participants will have the option of writing either a function or a class the next time. There will be a virtual base class to inherit from.
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    Actually the struct is passed by reference, which...

    Actually the struct is passed by reference, which requires C++. Well, if anyone wants to write a function only, I could convert it myself. I don't like the solution with all the namespaces.
  20. Thread: t-shirt

    by Sang-drax
    Replies
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    8,785

    A proof that P = NP does not mean that all...

    A proof that P = NP does not mean that all problems in NP suddenly become tractable.

    What if an algorithm is found solving 3SAT with worst-case complexity O(n^g), where g is Graham's number?
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    And here are the last two files. Study these...

    And here are the last two files.


    Study these three simple AIs and try to beat them! This competition will be held again and now you have programs to practice against!

    Let me know if you want...
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    Here are the first 5 files used for running the...

    Here are the first 5 files used for running the contest. CBoard won't let me upload a .zip file.
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    Poll: The test is designed so that random guessing...

    The test is designed so that random guessing gives you 0 points on average. You should try to answer all questions because you can often rule out at least one option and then guessing will give you...
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    With the contestants permissions, I can post the...

    With the contestants permissions, I can post the source code of the competition program and the computer players.
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    Results here:...

    Results here: http://cboard.cprogramming.com/contests-board/125618-poker-ai-results.htm
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