##  [Perturbation Expansion](/perturbation-expansion) 

  ##  [Perturbation Expansion](https://natural.quantumdictionary.io/perturbation-expansion-0) 

  

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**Natural & Formal Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

An approximate representation of a solution to a problem as a series in a small dimensionless parameter ε, with successive terms computed by solving linearized or order-by-order equations.