PASS cylinder n=3: ranks 9 < 10; no endomorphism A
PASS cylinder n=4: ranks 16 < 17; no endomorphism A
PASS cylinder n=5: ranks 25 < 26; no endomorphism A
PASS constant sectional curvature 0: A=0I
PASS constant sectional curvature 1: A=1I
PASS constant sectional curvature -1: A=-1I
PASS dimension-two sphere control; no obstruction claimed there
PASS Ricci=diag(1,1,0); W(e3,e1)e1=-e3/2
All exact pointwise checks passed. See paper for the analytic proof.
