Ben and John write about differential length vectors in unexpected coordinates

Physics students’ construction of differential length vectors in an unconventional spherical coordinate system Benjamin P. Schermerhorn and John R. Thompson Phys. Rev. Phys. Educ. Res. 15, 010111 Vector calculus and multivariable coordinate systems play a large role in the understanding and calculation of much of the physics in upper-division electricity and magnetism. Differential vector elements read more Ben and John write about differential length vectors in unexpected coordinates