2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/31177Very few studies involve how to construct the efficient RBFs by means of problem features. Recently the present author presented general solution RBF (GS-RBF) methodology to create operator-dependent RBFs successfully [1]. On the other hand, the normal radial basis function (RBF) is defined via Euclidean space distance function or the geodesic distance [2]. This purpose of this note is to redefine distance function in conjunction with problem features, which include problem-dependent and time-space distance function.Computational Engineering, Finance, and ScienceComputational GeometryG1.3, G1.8Definitions of distance function in radial basis function approachtext