Fig. 10
From: A Review: Applications of the Spectral Finite Element Method

Mapping to the unit cube (mapping like in isoparametric FEM—in SFEM we have more nodes we can applied subparametric mapping)
From: A Review: Applications of the Spectral Finite Element Method

Mapping to the unit cube (mapping like in isoparametric FEM—in SFEM we have more nodes we can applied subparametric mapping)