Benedetto, John J.; Heil, Christopher; Walnut, David F. (1994). "Differentiation and the Balian–Low Theorem". Journal of Fourier Analysis and Applications. 1 (4): 355–402. CiteSeerX10.1.1.118.7368. doi:10.1007/s00041-001-4016-5.
balian, theorem, mathematics, fourier, analysis, named, roger, balian, francis, theorem, states, that, there, well, localized, window, function, gabor, atom, either, time, frequency, exact, gabor, frame, riesz, basis, contents, statement, generalizations, also. In mathematics the Balian Low theorem in Fourier analysis is named for Roger Balian and Francis E Low The theorem states that there is no well localized window function or Gabor atom g either in time or frequency for an exact Gabor frame Riesz Basis Contents 1 Statement 2 Generalizations 3 See also 4 ReferencesStatement EditSuppose g is a square integrable function on the real line and consider the so called Gabor system g m n x e 2 p i m b x g x n a displaystyle g m n x e 2 pi imbx g x na for integers m and n and a b gt 0 satisfying ab 1 The Balian Low theorem states that if g m n m n Z displaystyle g m n m n in mathbb Z is an orthonormal basis for the Hilbert space L 2 R displaystyle L 2 mathbb R then either x 2 g x 2 d x or 3 2 g 3 2 d 3 displaystyle int infty infty x 2 g x 2 dx infty quad textrm or quad int infty infty xi 2 hat g xi 2 d xi infty Generalizations EditThe Balian Low theorem has been extended to exact Gabor frames See also EditGabor filter in image processing References EditBenedetto John J Heil Christopher Walnut David F 1994 Differentiation and the Balian Low Theorem Journal of Fourier Analysis and Applications 1 4 355 402 CiteSeerX 10 1 1 118 7368 doi 10 1007 s00041 001 4016 5 This article incorporates material from Balian Low on PlanetMath which is licensed under the Creative Commons Attribution Share Alike License Retrieved from https en wikipedia org w index php title Balian Low theorem amp oldid 909460312, wikipedia, wiki, book, books, library,