卵形线    closed convex curve

闭凸包    closed convex hull

闭覆盖    closed cover

闭圆盘    closed disk

闭等价关系    closed equivalence relation

闭扩张    closed extension

闭滤子    closed filter

闭型    closed form

闭公式    closed formula

闭测地线    closed geodesic

闭图定理    closed graph theorem

闭群    closed group

闭半平面    closed half plane

闭半空间    closed half space

闭包    closed hull

闭核    closed kernel

闭线性廖    closed linear manifold

闭廖    closed manifold

闭映射    closed map

闭邻域    closed neighborhood

闭实数平面    closed number plane

闭值域定理    closed range theorem

闭黎曼面    closed riemann surface

闭集    closed set

闭壳层    closed shell

闭单形    closed simplex

闭实心球    closed solid sphere

闭星形    closed star

闭子群    closed subgroup

闭曲面    closed surface

闭对称扩张    closed symmetric extension

闭项    closed term

闭包算子    closure operator

闭包性质    closure property

回旋曲线    clothoid

余伴随函子    coadjoint functor

上代数    coalgebra

较粗划分    coarser partition

共轴圆    coaxial circles

共基    cobase

配边廖    cobordant manifolds

配边    cobordism