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En-ring

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In mathematics, an -algebra in a symmetric monoidal infinity category C consists of the following data:

  • An object for any open subset U of Rn homeomorphic to an n-disk.
  • A multiplication map:
for any disjoint open disks contained in some open disk V

subject to the requirements that the multiplication maps are compatible with composition, and that is an equivalence if . An equivalent definition is that A is an algebra in C over the little n-disks operad.

Examples[edit]

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External links[edit]

  • "En-algebra", ncatlab.org