Definition:Proper


 * In abstract algebra:
 * Definition:Proper Subfield
 * Definition:Proper Subgroup
 * Definition:Proper Subring
 * Definition:Proper Subcontinuum
 * Definition:Proper Vector Subspace
 * Definition:Proper Submodule
 * Definition:Proper Ideal of Ring
 * Definition:Proper G-Submodule


 * In graph theory:
 * Definition:Proper Coloring
 * Definition:Proper Vertex Coloring
 * Definition:Proper Ancestor Node


 * In group theory:
 * Definition:Proper Refinement of Normal Series


 * In linear algebra:
 * Definition:Proper Orthogonal Matrix


 * In logic:
 * Definition:Proper Subformula
 * Definition:Proper Well-Formed Part


 * In number theory:
 * Definition:Proper Divisor of Integer


 * In ring theory:
 * Definition:Proper Element of Ring
 * Definition:Proper Zero Divisor
 * Definition:Proper Divisor


 * In set theory:
 * Definition:Proper Subset
 * Definition:Proper Class
 * Definition:Proper Filter
 * Definition:Proper Well-Ordering


 * In topology:
 * Definition:Proper Mapping
 * Definition:Proper Group Action


 * Miscellaneous:
 * Definition:Proper Name

Also see

 * Definition:Improper
 * Definition:Trivial