positive definiteness covariance

aerodynamics at very high altitude Arconnay borderline motor fuel cold plate collateral chain defensive portfolio fire extinguishing pump high flown impregnations infantile arteriosclerosis keep one's bearings light kit multicavity mould pellinore pi-meson programme chooser Quercus wislizenii Schopper's cloth abrasion tester subsistings to make fast to the mooring buoy