x_{1} is a mathematical structure defined on underlying structure/set/parts x_{2} with properties/rules/relations/operands/functions/substructures x_{3} in mathematics x_{4}.

Includes algebraic structures such as magmas etc., ordered sets of various forms and with various order relations, sets with other relations (which could be represented via graphs/networks), topological spaces, metric spaces, etc. Any mathematical structure falls into the semantic scope of this word.

- karbina
- x
_{1}and x_{2}are elements of the same partially-ordered set x_{3}(see notes) such that x_{1}and x_{2}cannot be meaningfully compared via said relation/in said property.