EntityQ2895824· pop 6· linked from 23 articlesdefinable setSign in to saven-ary relation on the domain of a structure whose elements satisfy some formula in theConnectionselementary equivalenceEntitynatural numberEntityintegerEntityreal numberEntitysetEntitymathematical logicEntityempty setEntitysubsetEntityfieldEntitycomputability theoryEntityfirst-order logicEntityautomorphismEntitysingletonEntityWalter RudinEntityfield of setsEntitywell-formed formulaEntitysecond-order logicEntitydescriptive set theoryEntityfree and bound variablesEntityarithmetical hierarchyEntityCategoriesLogicMathematical logicModel theory