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#2282: gallery examples use low-order integration n Multipole
by Erik Schnetter 23 Jan '25

23 Jan '25

#2282: gallery examples use low-order integration n Multipole Reporter: Roland Haas Status: new Milestone: Version: Type: enhancement Priority: minor Component: EinsteinToolkit website Comment (by Erik Schnetter): Did you do this globally? That is, there are now `nx+1` points along the equator, and there is no double-sampling any more? This would have broken the Driscoll&Healy integrator. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2282/gallery-examples-…

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#2282: gallery examples use low-order integration n Multipole
by Zach Etienne 23 Jan '25

23 Jan '25

#2282: gallery examples use low-order integration n Multipole Reporter: Roland Haas Status: new Milestone: Version: Type: enhancement Priority: minor Component: EinsteinToolkit website Comment (by Zach Etienne): I adjusted the sampled points so that 0 and n\{x,y\} correspond to points that lie within \(0,pi\), and \(0,2 pi\), _excluding_ the endpoints \(midpoints, naturally\). dtheta and dphi were adjusted accordingly. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2282/gallery-examples-…

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#2840: supplement rather than supercede auto-guessed data with gsl-config
by Roland Haas 23 Jan '25

23 Jan '25

#2840: supplement rather than supercede auto-guessed data with gsl-config Reporter: Roland Haas Status: open Milestone: Version: Type: bug Priority: minor Component: EinsteinToolkit thorn Changes (by Roland Haas): title: supplement rather than supercede auto-guessed data with gsl-config (was supplement rather than supercese auto-guessed data with gsl-config) -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2840/supplement-rather…

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#2175: Test "Single, stable neutron star" example
by Roland Haas 23 Jan '25

23 Jan '25

#2175: Test "Single, stable neutron star" example Reporter: Roland Haas Status: open Milestone: ET_2024_11 Version: development version Type: task Priority: major Component: EinsteinToolkit website Comment (by Roland Haas): @{712020:f7b71fbc-4964-482c-9ef9-4a5f5b90754b} could you try again please? Also updating the web-page, please? -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2175/test-single-stabl…

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#2172: Test "Binary black hole GW150914" example
by Roland Haas 23 Jan '25

23 Jan '25

#2172: Test "Binary black hole GW150914" example Reporter: Roland Haas Status: open Milestone: ET_2024_11 Version: development version Type: task Priority: major Component: EinsteinToolkit website Comment (by Roland Haas): @{557058:f7fd5133-6eee-4385-a5e5-3e03342a0b24} could you update the web-page and the downloads section, please? -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2172/test-binary-black…

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#2282: gallery examples use low-order integration n Multipole
by Erik Schnetter 22 Jan '25

22 Jan '25

#2282: gallery examples use low-order integration n Multipole Reporter: Roland Haas Status: new Milestone: Version: Type: enhancement Priority: minor Component: EinsteinToolkit website Comment (by Erik Schnetter): I see this code: ``` for (iy = 0; iy <= ny; iy++) for (ix = 0; ix <= nx; ix++) integrand_sum += f[idx(ix,iy)]; ``` This double-counts the first/last point on the equator. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2282/gallery-examples-…

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#2282: gallery examples use low-order integration n Multipole
by Roland Haas 22 Jan '25

22 Jan '25

#2282: gallery examples use low-order integration n Multipole Reporter: Roland Haas Status: new Milestone: Version: Type: enhancement Priority: minor Component: EinsteinToolkit website Comment (by Roland Haas): Zach fixed the midpoint rule in git hash [42342282](https://bitbucket.org/einsteintoolkit/einsteinanalysis/commits/42… "Multipole: Journey to fix midpoint integration begins." of [einsteinanalysis](https://bitbucket.org/einsteintoolkit/einsteinanalysis) as far as I know. Ticket [#2398](https://bitbucket.org/einsteintoolkit/tickets/issues/2398/multipole-default-midpoint-integration). Yes to the other statements though. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2282/gallery-examples-…

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#2282: gallery examples use low-order integration n Multipole
by Erik Schnetter 22 Jan '25

22 Jan '25

#2282: gallery examples use low-order integration n Multipole Reporter: Roland Haas Status: new Milestone: Version: Type: enhancement Priority: minor Component: EinsteinToolkit website Comment (by Erik Schnetter): The `DriscollHealy2D` rule is the best rule we implemented. It has spectral accuracy. The so-called `midpoint` rule doesn’t implement the midpoint rule and is only 1st order accurate, different from the documentation. Most integration methods neglect the fact that the domain is periodic in the phi direction and introduce unnecessary errors there. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2282/gallery-examples-…

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#2282: gallery examples use low-order integration n Multipole
by Zach Etienne 22 Jan '25

22 Jan '25

#2282: gallery examples use low-order integration n Multipole Reporter: Roland Haas Status: new Milestone: Version: Type: enhancement Priority: minor Component: EinsteinToolkit website Comment (by Zach Etienne): A correctly implemented extended midpoint rule should be 2nd-order accurate \(Numerical Recipes, Section 4.1\), with errors dropping like 1/N^2, where N is the number of subintervals. In addition, on spheres midpoint rule is often preferred as it can avoid sampling on the singular z-axis. -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2282/gallery-examples-…

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#2282: gallery examples use low-order integration n Multipole
by Roland Haas 17 Jan '25

17 Jan '25

#2282: gallery examples use low-order integration n Multipole Reporter: Roland Haas Status: new Milestone: Version: Type: enhancement Priority: minor Component: EinsteinToolkit website Comment (by Roland Haas): @{557058:f7fd5133-6eee-4385-a5e5-3e03342a0b24} did you also look into this when re-doing the GW150914 example for the Cannon release? -- Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2282/gallery-examples-…

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