In number theory, the Liouville function, named after French mathematician Joseph Liouville and denoted λ ( n ) {\displaystyle \lambda (n)} , is an important arithmetic function. Its value is 1 {\displaystyle 1} if n {\displaystyle n} is the product of an even number of prime numbers, and − 1 {\displaystyle -1} if it is the product of an odd number of prime numbers.
In number theory, the Liouville function, named after French mathematician Joseph Liouville and denoted λ ( n ) {\displaystyle \lambda (n)} , is an important arithmetic function. Its value is 1 {\displaystyle 1} if n {\displaystyle n} is the product of an even number of prime numbers, and − 1 {\displaystyle -1} if it is the product of an odd number of prime numbers.
Source: Wikipedia "Liouville function" · CC BY-SA 4.0
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