Timeline for The Fourier transform of the Liouville function?
Current License: CC BY-SA 4.0
7 events
when toggle format | what | by | license | comment | |
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Aug 24 at 10:58 | vote | accept | mathoverflowUser | ||
Feb 23 at 15:47 | comment | added | mathoverflowUser | You should try to evaluate it with $\Omega(0):=0$ or $\lambda(0):=1$ and see if it resolves the issue. | |
Feb 23 at 14:48 | comment | added | Steven Clark | @mathoverflowUser I evaluated formula (1) in my answer above as $$\lambda(x)=\sum\limits_z^{\text{Select}[\text{Range}[-K,K],\text{#}\neq 0\&]} \frac{\sin(\pi (x-z))\, \cos(\pi (\Omega(z)+x-z))}{\pi (x-z)}$$ which omits the $z=0$ term since $\Omega(0)$ is undefined. I evaluated your first formula for $\gamma(x)$ as $$\gamma(x)=\sum\limits_z^{\text{Select}[\text{Range}[-K,K],\text{#}\neq 0\&]} \frac{(-1)^{\Omega (z)}}{x-z}$$ which also omits the $z=0$ term and in this case your second formula for $\lambda(x)$ corresponding to formula (3) in my answer above evaluates to zero at $x=0$. | |
Feb 23 at 7:20 | comment | added | mathoverflowUser | I have edited the question with SageMath Code which evaluates to $\lambda(0)=1$ in both cases. How did you define the $\Omega(0)$ in your first picture? Can you share your code? | |
Feb 23 at 2:11 | history | edited | Steven Clark | CC BY-SA 4.0 |
Added definition and illustration of an inconsistent formula in the question above.
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Feb 22 at 22:40 | history | edited | Steven Clark | CC BY-SA 4.0 |
Revised formula (1) to use the sinc(x) function which evalutes to 1 at x=0 eliminating the need to evaluate formula (1) as a limit at integer values of x.
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Feb 22 at 21:57 | history | answered | Steven Clark | CC BY-SA 4.0 |