Look up algebroid in Wiktionary, the free dictionary.

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

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