<正> The formation mechanism for the regular octahedral structure of Li_6 cluster is proposed.The curve of thetotal energy versus the separation R between any t
【正】 The non-isospectral sine-Gordon equation with self-consistent sources is derived.Its solutions are obtainedby means of Hirota method and Wronskian techni
<正> We reveal that the two-variable Hermite function h_(m,n),which is the generalized Bargmann representationof the two-mode Fock state,involves quantum entang