Assertion: coordinate system | /r/HasProperty | orthogonal
Facets:
Source sentences:
text: This equation shows that σ and τ are the real and imaginary parts of an analytic function of x+iy (with logarithmic branch points at the foci), which in turn proves (by appeal to the general theory of conformal mapping) that the curves of σ and τ intersect at right angles, i.e., that the coordinate system is orthogonal.
text: The basis and cobasis do not coincide unless the coordinate system is orthogonal.
text: The basis and cobasis do not coincide unless the coordinate system is orthogonal.