GravityFlow
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GravityFlow is the former name of PMflow, the boundary-condition solver for the gravitational-scattering integral families on which the ordinary auxiliary-mass-flow recursion never terminates. Nothing was removed in the rename: the command-line program, its solver and its ratio-extrapolation script live in tools/pmflow/ in the BootLoops repository, released under the MIT license. The PMflow page describes them, with examples and the list of routines. The old command still works: tools/pmflow/gravityflow.py is a compatibility alias that prints [gravityflow] forwarding to pmflow.py (PMflow) on standard error and then runs pmflow.py with the same arguments, so scripts that call gravityflow.py need no change. Two diagnostic strings from the underlying AMFlow build, GRAVITYFLOW_FIXEDPOINT and GRAVITYFLOW_CUTREGION, keep the old spelling.