parabolic coordinates
The curves where s or t are constant are parabolas. Laplace's equation is invariant under a change to parabolic coordinates. Note that these coordinates arise from the complex, conformal map z ↦ z2/2 from the first quadrant to the upper half-plane.
- ratio test
- raw data
- ray
- Re
- reachable set
- reaction
- real
- real axis
- real function
- realism
- real line
- real number
- real part
- real projective plane
- real world
- rearrangement
- reciprocal
- rectangle
- rectangular
- rectangular distribution
- rectangular hyperbola
- rectangular number
- rectilinear motion
- recurrence relation
- recurrent