- complement of a great circular arc
- complement of an arc
- complement (of an element)
- complement of a submodule
- complement relation
- completable formula
- complete
- complete accumulation point
- complete algebra on a complete commutative semiring
- complete analytic function
- complete balanced Howell rotation
- complete Banach-Finsler manifold
- complete binary relation
- complete block design
- complete block system
- complete Boolean algebra
- complete class of decision function
- complete code
- complete continuity of linear integral operator
- complete continuity of nonlinear integral operator
- complete controllability in finite time
- complete degree
- complete discrimination system for polynomials
- complete distribution family
- complete elliptic integral