title: Algebroid
text: # Algebroid
  
  In mathematics, algebroid may refer to several distinct notions, which nevertheless all arise from generalising certain aspects of the theory of algebras or Lie algebras.
  
  * Algebroid branch, a formal power series branch of an algebraic curve
  * Algebroid cohomology
  * Algebroid multifunction
  * Courant algebroid, an object generalising Lie bialgebroids
  * Lie algebroid, the infinitesimal counterpart of Lie groupoids
     * Atiyah algebroid, a fundamental example of a Lie algebroid associated to a principal bundle
  * R-algebroid, a categorical construction associated to groupoids
  