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s243a

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Everything posted by s243a

  1. There doesn?t seem to be any area for mathematics so for now I will put everything in one thread. Yesterday I was thinking about generalizing matrix multiplication to higher dimensions. I know this has already been done before (A.K.A.) tensors but I don?t know anything about tensors. Anyway I realized that there are three common types of multiplication that can be done on matrices. They are element wise multiplication, the inner product and the outer product. Many types of matrix multiplications can be expressed as a combination of these. For instance standard 2D matrix multiplication is a combination of the inner and outer product. The rows of matrix one and the columns of matrix two are used in the outer product while the columns of matrix one and the rows of matrix two are used in the inner product.
  2. s243a

    Hey Guys.

    Trying to get my free acount. I probably should be doing some work.
  3. My last post was over three lines and the post counter didn't go up ???
  4. Can I repost something I posted somewhere else? Random muses from a ranting fool, Drivel spilt by a doodling tool, Shouts and songs with no direction Keys pressed without any conception A monkey forced to type by a shakespeare junky Boy isnt creativity funky? From: http://forums.xisto.com/no_longer_exists/ Anyway I would like to request webspace. I can't figure out how to do that somehow I feel trapped. It is 9:00 and I havn't had supper yet.
  5. Do all of the 10 posts have to be usefull? Does this one count? Anyway this will make post 11.
  6. What lead me to this trap website is geocities would not let me upload documents I created with word that contained formulas. The created web pages used xml. The files they would not except where called xml skins and had the extension (.wmz)Anyway this will make my 10th post so hopefully I can put more thought into my posts now.
  7. I orginaly posted that code at: http://forums.xisto.com/no_longer_exists/
  8. I thought I would do some orbital mechanics in VB because alot of people have acces to it thorough excel. Here is one I did to calculate the departure delta v for a hofmann transfer: Function Hohmann_P(r1, r2, mu)[br] Hohmann_P = Sqr(mu / r1) * Sqr(2 * r2 / (r1 + r2) - 1)[/br]End Function Okay that is overly simplistic.
  9. Can anyone recommend some?
  10. s243a

    Matlab

    I like MATLAB for numeric stuff. It is very easy to use. http://www.mathworks.com/?nocookie=true
  11. My faviorate discussion form is http://newmars.com/forums/ What is yours?
  12. s243a

    Threading

    I started reading some stuff about threading recently. There are two types of threading I might consider learning they are P threading and win32 thread. If I new how to generate timed interrupts I might forget about threading all together. By the way there should be a section for non language specific topics like: threading, object oriented programming functional programming etc. Here are some good links: Example Starting a thread in a Pthread program Guide to DECthreads Has some links to some threading libraries Free open source P thread library for win32 Some examples of win32 threading
  13. I'f I am going to be forced to post I would like some interesting topics.
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