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updated 10 years ago

tau.m by David Terr

Given a nonnegative integer n, tau(n) is the Ramanujan tau function of n. (symbolic math, ramanujan tau functio..., modular)

tau(n)

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updated 10 years ago

sigma.m by David Terr

Given nonnegative integers k and n, sigma(k,n) is the sum of the kth powers of the divisors of n. (symbolic math, divisor, factor)

sigma(k,n)

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