In this paper we introduce a new concept, called the Schauder basis determining property, which is strictly stronger than the concept of a countably determining
In this paper, the hyperspherical harmonics used for solving the three and four body problems in nuclear physics are given. The equations of the adiabatic appro
In this paper, we discuss higher order sublinear functional differential equation x<sup>n</sup>(t)+p(t)x<sup>v</sup>(g(t))=0 t≥t<sub>o</sub> where andSome necessary an