jn
Jn is a compact notation that appears in several scholarly domains. It does not denote a single object; its meaning depends on the discipline and on whether Jn is written with a subscript, capitalization, or as part of a longer symbol. In many mathematical texts, Jn is read as "the J indexed by n" and used to designate a member of a family parameterized by n.
In analysis and applied mathematics, Jn(x) most often denotes the Bessel function of the first kind of
In algebraic topology, Jn denotes the image of the J-homomorphism in the nth stable homotopy group of
Because Jn is not unique to a single domain, its interpretation is characteristically field-specific. When encountering