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英文字典中文字典相关资料:


  • 13. Fourier transforms - University of Minnesota Twin Cities
    In fact, to extend the Fourier transform to L2(Rn), the integral de nition of the Fourier transform must also be extended to a situation where the literal integral does not converge
  • [1103. 1869] Basics of Generalized Unitarity - arXiv. org
    We review generalized unitarity as a means for obtaining loop amplitudes from on-shell tree amplitudes The method is generally applicable to both supersymmetric and non-supersymmetric amplitudes, including non-planar contributions Here we focus mainly on N=4 Yang-Mills theory, in the context of on-shell superspaces
  • §4. 5 Fourier transforms and the Uncertainty Principle - Durham
    4 5 FOURIER TRANSFORMS AND THE UNCERTAINTY PRINCIPLE 4 must have ∫ 1 1 jxf(x) f′(x)j2 dx = ∫ 1 1 (xf(x) f′(x))(xf(x) f′(x)) dx = ∫ 1 1 (x2jf(x)j2 + 2jf′(x)j2 x (f(x)f′(x) +f (x)f′(x)) dx = ∆ x)2 + 2∆ p)2 ∫ 1 1 x d(f(x)f(x) ) dx dx = ∆ x)2 + 2∆ p) 2 [xjf(x)j]1 1 + ∫ 1 1 jf(x)j2dx = ∆ x) 2+ ∆ p)2 + 0
  • A Fourier transform for all generalized functions
    Using the existence of infinite numbers k in the non-Archimedean ring of Robinson-Colombeau, we define the hyperfinite Fourier transform (HFT) by considering integration extended to the interval [−k, k]n instead of (−∞, ∞)n





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