Description: The Selberg symmetry formula for products of three primes, instead of two. The sum here can also be written in the symmetric form sum_ i j k <_ x , Lam ( i ) Lam ( j ) Lam ( k ) ; we eliminate one of the nested sums by using the definition of psi ( x ) = sum_ k <_ x , Lam ( k ) . This statement can thus equivalently be written psi ( x ) log ^ 2 ( x ) = 2 sum_ i j k <_ x , Lam ( i ) Lam ( j ) Lam ( k ) + O ( x log x ) . Equation 10.4.23 of Shapiro, p. 422. (Contributed by Mario Carneiro, 30-May-2016)
Ref | Expression | ||
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Assertion | selberg4 | |