. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "14251"^^ . . . . . "20963"^^ . . "In mathematics, the classic M\u00F6bius inversion formula is a relation between pairs of arithmetic functions, each defined from the other by sums over divisors. It was introduced into number theory in 1832 by August Ferdinand M\u00F6bius. A large generalization of this formula applies to summation over an arbitrary locally finite partially ordered set, with M\u00F6bius' classical formula applying to the set of the natural numbers ordered by divisibility: see incidence algebra."@en . . . . . . . "M\u00F6bius inversion formula"@en . . . . . . . "1050724474"^^ . . . . . . . "In mathematics, the classic M\u00F6bius inversion formula is a relation between pairs of arithmetic functions, each defined from the other by sums over divisors. It was introduced into number theory in 1832 by August Ferdinand M\u00F6bius. A large generalization of this formula applies to summation over an arbitrary locally finite partially ordered set, with M\u00F6bius' classical formula applying to the set of the natural numbers ordered by divisibility: see incidence algebra."@en .