- real line
- real linear space
- real linear space
- real matrix
- realm of word
- real normal matrix
- real n-plane bundle
- real null point theorem
- real number
- real number
- real number axis
- real number system
- realoptions
- real part
- real part of complex numbers
- real place
- real point
- real power compact space
- real quadratic form
- real quadratic form
- real quadratic form of same class
- real radical of an ideal
- real representation of Lie group
- real root of Kac-Moody algebra
- real spectrum