##  [Expansion](/expansion) 

  ##  [Expansion](https://mathlogic.quantumdictionary.io/expansion-0) 

  

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- Natural & Formal Sciences -

**Mathematics & Logic Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The operation or relation of adding new symbols (constants, functions, relations) and specifying their interpretations to a structure or theory, producing a richer language and possibly new information about the same underlying domain. An expansion can be definitional (determined by the old structure) or genuine (introducing independent choices).