- complete induction principle
- complete integral
- complete intersection
- complete K-algebra
- complete k-partite graph
- complete Latin square
- complete lattice
- complete lattice
- complete lattice
- complete lattice homomorphism
- complete lattice-ordered group
- complete lattice-ordered group
- complete lattice-ordered group
- complete lattice-ordered groupoid
- complete lattice-ordered monoid
- complete lattice-ordered ring
- complete lattice-ordered semigroup
- complete linear system
- completely additive class
- completely additive set function
- completely continuous mapping
- completely continuous operator
- completely continuous vector field
- completely Dedekind finite ring
- completely distributive lattice