該期刊是一本國際數學期刊，致力于近似和擴展以及計算，功能理論，功能分析，插值空間和算子插值，數值分析，函數空間，特殊函數和應用的相關研究。

This journal is an international mathematics journal dedicated to Approximations and Expansions and related research in computation, function theory, functional analysis, interpolation spaces and interpolation of operators, numerical analysis, space of functions, special functions, and applications.