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Math Help - why these expression are the same..

  1. #1
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    why these expression are the same..

    on the bottom of this page we have an expression which represents all solutions
    http://i45.tinypic.com/140hqtx.jpg

    but
    later
    in here
    http://i45.tinypic.com/2nrfswm.jpg

    they present another expression and say that its the same as the integral before(all the solutions)


    why they are the same??
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  2. #2
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    Quote Originally Posted by transgalactic View Post
    on the bottom of this page we have an expression which represents all solutions
    http://i45.tinypic.com/140hqtx.jpg

    but
    later
    in here
    http://i45.tinypic.com/2nrfswm.jpg

    they present another expression and say that its the same as the integral before(all the solutions)


    why they are the same??

    He's just putting \psi(x)=\int\limits_{-\infty}^\infty A(k)e^{ikx}dk in the second expression, that's all.

    Tonio
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  3. #3
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    ahh thanks
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