- regular representation of group
- regular scheme
- regular semigroup
- regular sequence
- regular sequence of transfinite cardinal numbers
- regular set
- regular set
- regular set
- regular set
- regular singurality
- regular solution
- regular space
- regular spherical broken line
- regular spherical polygon
- regular spherical triangle
- regular splitting
- regular splitting of a matrix
- regular star body
- regular star polygon
- regular stationary process
- regular subalgebra
- regular subgroup of a lattice-ordered group
- regular submanifold
- regular summation
- regular surface