parallelogram law
This identity holds in inner product spaces; a Banach space is a Hilbert space if and only if the parallelogram law holds.
- rational canonical form
- rational function
- rationalize
- rational number
- 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