Recent content by astronomia84

  1. A

    Download "Control theoretic techniques" Runge-Kutta Paper (1991) Free

    -------------------------------------------------------------------------------------------------- I don't know if you are registered at some institution, but I can access the paper for free from the computers of my university...
  2. A

    Download "Control theoretic techniques" Runge-Kutta Paper (1991) Free

    I'm trying to find a location in the Internet where I can download (for free) the following paper: Kjell Gustafsson , "Control theoretic techniques for stepsize selection in explicit Runge-Kutta methods" (Year of Publication: 1991 ) Thanks in advance :cool:
  3. A

    Graduate Kustaanheimo-Stiefel transformation ?

    Thanks for the link . :cool: More specific information about KS & restricted three-body problem?
  4. A

    Graduate Kustaanheimo-Stiefel transformation ?

    [SIZE="4"]Kustaanheimo-Stiefel transformation What is Kustaanheimo-Stiefel transformation (KS) & why is useful for restricted three-body problem ?
  5. A

    Where Can I Download M.V.Berry's 'Stability of the Solar System' Paper for Free?

    Thanks for the posts,finally the right title is "regular & irregular motion". Cristo:Thanks for link
  6. A

    Where Can I Download M.V.Berry's 'Stability of the Solar System' Paper for Free?

    I'm trying to find a location in the Internet where I can download (for free) the following paper: M.V.Berry , "Stability of the Solar System" (possibly 1979)
  7. A

    Find φ(x,y) Using Killing Vectors: Conformal Function

    MY FIRST POST IS HERE… Physics -->Special & General Relativity -->Killing Problem 1
  8. A

    Find φ(x,y) Using Killing Vectors: Conformal Function

    answer---answer MY QUESTION IS NOT HOMEWORK. MY FIRST POST IS HERE… https://www.physicsforums.com/showthread.php?t=154436 AND MOVED HERE. I READ FOR MY EXAMINATIONS IN GENERAL RELATIVITY. IF YOU CAN HELP ME ANSWER.I DO NOT REQUEST. :bugeye: :bugeye: :bugeye: THANKS FOR ALL MY...
  9. A

    Graduate How Can I Prove This Metric is Flat?

    Note: Sorry For My English Is Bad.
  10. A

    Graduate How Can I Prove This Metric is Flat?

    Answer INTEREST coalquay404 I DO NOT HAVE MORE ELEMENTS FOR THIS QUESTION. :devil: NOTE: SORRY FROM MY ENGLISH IS BAD.
  11. A

    Find φ(x,y) Using Killing Vectors: Conformal Function

    Thank For All YOU CAN WRITE THE FIRST STEPS FOR THE PROBLEM... :blushing:
  12. A

    Find φ(x,y) Using Killing Vectors: Conformal Function

    thanks thanks cristo ,something more ... :biggrin:
  13. A

    Graduate How Can I Prove This Metric is Flat?

    thanks thanks! how i can find a transformation to make this metric in flat form?
  14. A

    Find φ(x,y) Using Killing Vectors: Conformal Function

    Does anyone know how can find φ(x,y) (conformal function) if \xi =(y,-x) & \eta = (x,y) is killing vectors ,for this metric ds^2 = \phi(x,y)(dx^2 +dy^2) ? o:) :smile:
  15. A

    Graduate How Can I Prove This Metric is Flat?

    Question On Metric! DOES ANYONE KNOW HOW CAN PROVE THIS METRIC/SPACE IS FLAT? ds^2 = (-dx^2 +dy^2)e^{ax+by} general what is flat space? how i can find a transformation to make this metric in flat form? :zzz: