Definition
In mathematics, a set is inhabited if there exists an element .
Related concepts
Abstract logicAckermann set theoryAleph numberAlgebraic logicAlphabet (formal languages)ArgumentArityAtomic formulaAtomic model (mathematical logic)Atomic sentenceAutomata theoryAutomated theorem provingAxiomAxiom of choiceAxiom of separationAxiom schemaAxiomatic systemAxiomatization of Boolean algebrasBanach–Tarski paradoxBijectionBinary operationBoolean algebraBoolean algebras canonically definedBoolean functionCantor's diagonal argumentCantor's paradoxCantor's theoremCardinalityCartesian productCategorical theoryCategory (mathematics)Category of setsCategory theoryChurch encodingChurch–Turing thesisClass (set theory)Classical logicCodomainCompactness theoremComplement (set theory)Complete theoryComputability theoryComputable functionComputable setComputably enumerable setConcrete categoryConservative extensionConsistencyConstructible universeConstruction of the real numbersConstructive mathematicsConstructive proofConstructive set theoryContinuum hypothesisCountable setDecidability (logic)Decision problemDeductive systemDiaconescu's theoremDiagram (mathematical logic)Disjunction propertyDomain of a functionElement (mathematics)Elementary diagramElementary equivalenceElementary function arithmeticEmpty setEnumerationEquiconsistencyEquivalence relationEuclid's ElementsEuclidean geometryExistential quantificationExistential quantifierExpression (mathematics)Extension by definitionsExtension by new constant and function namesExtensionalityFinitary relationFinite-valued logicFinite model theoryFinite setFirst-order logicFixed-point logicForcing (mathematics)Formal grammarFormal languageFormal proofFormal semantics (logic)Formal systemFormation ruleFoundations of geometryFoundations of mathematicsFree logicFree variables and bound variablesFunction (mathematics)Functional predicateFuzzy setGeneral set theoryGrothendieck universeGround expressionGround formulaGödel's completeness theoremGödel's incompleteness theoremsGödel numberingHalting problemHamel basisHereditary setHigher-order logicHilbert's axiomsHilbert systemHistory of logicHistory of mathematical logicImage (mathematics)Inaccessible cardinalIndependence (mathematical logic)InferenceInference ruleInfinite-valued logicInfinite setInformation theoryInjective functionInterpretation (logic)Interpretation (model theory)Interpretation functionIntersection (set theory)Intuitionistic logicIsomorphismKolmogorov complexityKripke's theory of truthKripke modelKripke–Platek set theoryLambda calculusLarge cardinalLemma (mathematics)Lindström's theoremList of Hilbert systemsList of axiomsList of first-order theoriesList of formal systemsList of mathematical theoriesList of set identities and relationsList of statements independent of ZFCLogicLogical biconditionalLogical conjunctionLogical connectiveLogical consequenceLogical constantLogical disjunctionLogical equalityLogical equivalenceLogical truthLogicismLöwenheim–Skolem theoremMany-valued logicMap (mathematics)Material conditionalMathematical logicMathematical objectMetalanguageMinimal axioms for Boolean algebraMinimal logicModel complete theoryModel theoryMonadic predicate calculusMonadic second-order logicMorse–Kelley set theoryNP (complexity)Naive set theoryNatural deductionNegationNew FoundationsNon-Euclidean geometryNon-logical symbolNon-standard modelNon-standard model of arithmeticNothingOpen formulaOperation (mathematics)Ordinal analysisOrdinal numberP (complexity)P versus NP problemParadoxes of set theoryPartition of a setPeano axiomsPhilosophy of mathematicsPlanetMathPower setPredicate (mathematical logic)Predicate logicPredicate variablePrime modelPrimitive recursive arithmeticPrimitive recursive functionPrincipia MathematicaPrinciple of non-contradictionProof of impossibilityProof theoryPropositionPropositional calculusPropositional formulaPropositional variableQuantifier (logic)Quantifier rankRational numberReal numberRecursionRecursive setRelation (mathematics)Reverse mathematicsRobinson arithmeticRule of inferenceRussell's paradoxSatisfiabilitySaturated modelSchröder–Bernstein theoremSecond-order arithmeticSecond-order logicSelf-verifying theoriesSemantic theory of truthSemantics of logicSentence (mathematical logic)Sequent calculusSet (mathematics)Set theorySignature (logic)Singleton (mathematics)Skolem arithmeticSoundnessSpectrum of a sentenceSpectrum of a theorySquare of oppositionStrength (mathematical logic)String (formal languages)Structure (mathematical logic)Substitution (logic)Substructure (mathematics)SupertaskSurjective functionSyllogismSymbol (formal)Syntax (logic)T-schemaTarski's axiomatization of the realsTarski's axiomsTarski's theory of truthTarski's undefinability theoremTarski–Grothendieck set theoryTautology (logic)Term (logic)Term logicTheoremTheories of truthTheory (mathematical logic)Three-valued logicTimeline of mathematical logicTransfer principleTransitive setTrue arithmeticTruth predicateTruth tableTruth valueTuring machineType (model theory)Type inhabitationType theoryUltrafilter (set theory)UltraproductUncountable setUndecidable problemUninterpreted functionUnion (set theory)Uniqueness quantificationUniversal quantificationUniversal setUniverse (mathematics)UrelementValidity (logic)Variable (mathematics)Vector spaceVector space basisVenn diagramVon Neumann universeVon Neumann–Bernays–Gödel set theoryWell-formed formulaZermelo-Fraenkel set theoryZermelo–Fraenkel set theory
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