EntityQ792536· pop 11· linked from 394 articlesaxiom schemaSign in to savea formula in the metalanguage of an axiomatic system in which one or more schematic variables appearConnectionssemantic theory of truthEntitymathematical logicEntityfirst-order logicEntityformal systemEntityZermelo–Fraenkel set theoryEntityrecursive setEntitysemantics of logicEntityfree and bound variablesEntitystructureEntityground expressionEntitydiagramEntitylogicEntityBertrand RussellEntityInternational Standard Book NumberEntitynatural numberEntityset theoryEntityfunctionEntityJohn von NeumannEntitysetEntityaxiomEntityCategoriesFormal systemsMathematical axioms