Recent content by vcdfrexzaswq

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    Graduate Trouble understanding the Gamma function

    Ok thanks
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    Graduate Trouble understanding the Gamma function

    The http://en.wikipedia.org/wiki/Gamma_function" is the integral \Gamma(z)=\int_{0}^{\infty}{dt\, t^{z-1}e^{-t}} . It has poles for integers of z less than 1 and is finite everywhere else. But to me it seems like it should be infinite for non integer values of z less than 0. My reasoning...
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    Graduate Difference between Fermions and Bosons in Feynman diagrams

    I was hoping for a more physical answer.
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    Graduate Difference between Fermions and Bosons in Feynman diagrams

    What distinguishes Fermions form Bosons in Feynman diagrams?
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    Graduate How are the positions of particles described in QFT?

    If I understand correctly positions of particles cannot have exact values in QFT, there are no eigenvectors of position (right?). But the positions of particles must correspond approximately to some state in QFT because position is meaningful in QM and classical physics, and QFT is supposed to...