 ##  [Mayer-Vietoris Sequence](/mayer-vietoris-sequence) 

  ##  [Mayer-Vietoris Sequence](https://mathlogic.quantumdictionary.io/mayer-vietoris-sequence-0) 

  
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- Natural &amp; Formal Sciences -

**Mathematics &amp; Logic Dictionary**

 
Definition

A long exact sequence in homology (or cohomology) that relates the homology groups of a topological space decomposed as the union of two subspaces U and V to the homology of U, V, and their intersection U∩V via connecting homomorphisms.