Projective geometry of systems of second-order differential equationsIt is proved that every projective connection on an
n-dimensional manifold M is locally defined
EPR of rare-earth ion clusters in mixed crystals Ba1-xLa xF2+x doped with Yb3+ ion. K.
Aminov, R. Yu. Abdulsabirov, M. R. Gafurov, S. L. Korableva, I.
N. Kurkin, S. P. Kurzin, R. M
Field dependence of spin-lattice relaxation of Nd3+ ions in y3Al5O12 crystals is described by T1 -1=ATn + b exp(-ΔAT), where
n varies from sample to sample, with
n=1 for "perfect" samples
Projective geometry of systems of second-order differential equationsIt is proved that every projective connection on an
n-dimensional manifold M is locally defined