##  [Ramification Point](/ramification-point) 

  ##  [Ramification Point](https://algebra.quantumdictionary.io/ramification-point-0) 

  

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- Pure Mathematics -

**Algebra Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A point of a finite morphism (or extension) at which the map fails to be étale or locally bijective, measured by a ramification index greater than one; algebraically this corresponds to nontrivial inertia or nontrivial extension of residue fields.