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May 11, 2016 at 12:45 comment added Carlo Beenakker @davyjones -- condition on $f$ added, thanks for the pointer
May 11, 2016 at 12:45 history edited Carlo Beenakker CC BY-SA 3.0
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May 11, 2016 at 12:39 comment added davyjones It needs to be pointed out that $f$ should be an even function. In the Nosratinia paper it is assumed "positive semi-definite", and hence even a.e.
May 10, 2016 at 21:02 comment added Emilio Pisanty Well, indeed it would. That's pretty clever, thanks for that.
May 10, 2016 at 20:21 history edited Carlo Beenakker CC BY-SA 3.0
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May 10, 2016 at 20:17 comment added Carlo Beenakker @EmilioPisanty -- one member of the equivalence class can indeed be recovered immediately, $f=\sqrt{F/2}$; for a particular example Nosratinia constructs a one-parameter family of solutions to $F=f^2+\hat{f}\star\hat{f}$, but there may be more.
May 10, 2016 at 20:14 history edited Carlo Beenakker CC BY-SA 3.0
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May 10, 2016 at 19:46 comment added Emilio Pisanty Are there results on the size of the equivalence classes of $f$s that will yield the same $F$s? Can $f$ be recovered from $F$, or at least some member of the class?
May 10, 2016 at 15:40 history edited Carlo Beenakker CC BY-SA 3.0
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May 10, 2016 at 13:22 history edited Carlo Beenakker CC BY-SA 3.0
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May 10, 2016 at 13:09 history edited Carlo Beenakker CC BY-SA 3.0
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May 10, 2016 at 13:03 history answered Carlo Beenakker CC BY-SA 3.0