solvable group
such that the quotient groups Gi+1/Gi are abelian groups. For a finite group, this is equivalent to the group's composition factors being cyclic of prime order. It is significant to Galois theory that S5 is not solvable. See Galois group, solvable by radicals.
- rearrangement
- reciprocal
- rectangle
- rectangular
- rectangular distribution
- rectangular hyperbola
- rectangular number
- rectilinear motion
- recurrence relation
- recurrent
- recurring decimal
- recursion theory
- reduce
- reduced echelon form
- reduced set of residues
- reductio ad absurdum
- reduction formula
- redundancy
- redundant
- re-entrant
- reflection
- reflex angle
- reflexive relation
- reflexive space
- Regiomontanus