noncomputable def
BNPair.BruhatProperties.fromAxioms
{G : Type u_1}
[Group G]
{B_idx : Type u_2}
[DecidableEq B_idx]
[Fintype B_idx]
{M : CoxeterMatrix B_idx}
(bp : BNPair G M)
(ax : BNPairAxioms bp)
:
Assemble the full BruhatProperties bundle (cell cover/disjointness/inversion/multiplication
within parabolics, conjugator targeting, finiteness) for a BN-pair from its axioms.