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| Entity > Abstract > Class > Relation > BinaryRelation > UnaryFunction > OneToOneFunction > SequenceFunction | 
| SequenceFunction comparison table | |||
| Subject | documentation | is a kind of | have axiom | 
|---|---|---|---|
| OneToOneFunction | The Class of UnaryFunctions which are one to one. A function F is one to one just in case for all X, Y in the domain of F, if X is not identical to Y, then F(X) is not identical to F(Y) | UnaryFunction | (<=>  | 
| SequenceFunction | The Class of OneToOneFunctions whose range is a subclass of the PositiveIntegers | OneToOneFunction | (=>  | 
 Up: OneToOneFunction