pub fn select_pivot_amf(ws: &mut Workspace) -> Option<usize>Expand description
AMF analogue of select_pivot. Linear-scans coarse buckets
(idx > n) for the entry with the smallest exact score; takes the
head for fine buckets.
Side effects: ws.mindeg advances to the chosen bucket index. The
chosen me is unlinked from its degree-list chain (head update for
fine buckets, doubly-linked unlink for coarse buckets).
Reference: ana_orderings.F:4392-4427.