galpy.actionAngle.actionAngleTorus.hessianFreqs¶
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actionAngleTorus.
hessianFreqs
(jr, jphi, jz, **kwargs)[source]¶ NAME:
hessianFreqsPURPOSE:
return the Hessian d Omega / d J and frequencies Omega corresponding to a torusINPUT:
jr - radial action (scalar)
jphi - azimuthal action (scalar)
jz - vertical action (scalar)
tol= (object-wide value) goal for |dJ|/|J| along the torus
dJ= (object-wide value) action difference when computing derivatives (Hessian or Jacobian)
nosym= (False) if True, don’t explicitly symmetrize the Hessian (good to check errors)
OUTPUT:
(dO/dJ,Omegar,Omegaphi,Omegaz,Autofit error message)HISTORY:
2016-07-15 - Written - Bovy (UofT)