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No-U-Turn Sampler and Neal's Funnel
No-U-Turn Sampler and Neal's Funnel
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conceptual
The No-U-Turn Sampler (NUTS) terminates a leapfrog trajectory based on what criterion?
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A.
When the total energy
H
(
q
,
p
)
has changed by more than a fixed fraction since the start of the trajectory.
B.
When the acceptance probability of the next proposed Metropolis step drops below 0.234.
C.
When the leapfrog step size
ϵ
exceeds a tolerance threshold, indicating the integrator is becoming inaccurate.
D.
When momentum points against the displacement, showing the trajectory is turning back toward its starting point.
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