- special divisor
- special expression of polar coordinates equation of a curve
- special factor
- special function
- special functional equations
- specialization order
- special Jordan algebra
- special K1-group
- special linear group
- special linear group
- special model
- special orthogonal group
- special perturbation
- special p-group
- special plot software
- special point of locus
- special radical
- special semimartingale
- special situation
- special solution
- special subclass
- special topic chart
- special triangular matrix
- special unitary group
- special valued lattice-ordered group