Let f be a multiplicative function satisfying ∑f(d) = n/φ(n)
Let f be a multiplicative function satisfying ∑f(d) = n/φ(n), where the sum is taken over all positive divisors of n, and φ is Euler's totient function. Use the Mobius inversion formula to prove that f(n)=μ2(n)/φ(n)
Homework Answers
(1) Let f be a multiplicative function satisfying Σ f(d)-n/0(n), where the sum is taken over all ...
(1) Let f be a multiplicative function satisfying Σ f(d)-n/0(n), where the sum is taken over all positive divisors of n, and ф is Euler's totient function. Use the Mobius inversion formula to prove that f(n) ."(n)/0(n)
(1) Let f be a multiplicative function satisfying Σ f(d)-n/0(n), where the sum is taken over all positive divisors of n, and ф is Euler's totient function. Use the Mobius inversion formula to prove that f(n) ."(n)/0(n)
for each positive integer m, let v(m) denote the number of divisors of m. define the function F(n) =∑ v (d) dIn where the sum is over all positive divisors d of n p...
for each positive integer m, let v(m) denote the number of divisors of m. define the function F(n) =∑ v (d) dIn where the sum is over all positive divisors d of n prove that function F(n) is multiplicative
Lambda(n) denotes the Louisville function (ie the completely multiplicative function satisfying l...
Lambda(n) denotes the Louisville function (ie the completely
multiplicative function satisfying lambda(p): = -1 for every prime
number p)
Let f be a completely multiplicative function that is not identically zero and suppose that the series F) 28 converges absolutely for Re(s) > ơa. Prove that F(s) 0 and that f(n)x(n) _ F(22) (Re(s) > σα). 28 仁!
Let f be a completely multiplicative function that is not identically zero and suppose that the series F) 28 converges absolutely for...
Oblemns for Solution: 1. Recall that Euler's phi function (or called Euler's totient function) φ(...
oblemns for Solution: 1. Recall that Euler's phi function (or called Euler's totient function) φ(n) is defined as the number of integers m in the range 1< m<n such that m and n are relatively prime, i.e., gcd(rn, n) l. Find a formula for φ(n), n 2. (Hint: Factor n as the product of prime powers. i.e., n-TiỀ, where pi's are distinct primes and ei 〉 1, i, where p;'s are distinct primes and e > 1 t.
oblemns for...
C5. Let n EZ. If f is a multiplicative arithmetic function and pi is the prime factorization of n...
C5. Let n EZ. If f is a multiplicative arithmetic function and pi is the prime factorization of n. prove that μ(d)/(d)-| | (1-f(pi)) d n, d>0 For convenience, here's a summary of some potentially useful definitions and facts from our last lecture: For any two arithmetic functions f and g, the convolution of f with g is f(n) * g(n) = (f * g)(n) = dn, d 0 d n, d>0 1 denotes the constant function which maps every...
Exercise 2. Let φ denote the Euler totient function. (i) Prove that for all positive integers...
Exercise 2. Let φ denote the Euler totient function. (i) Prove that for all positive integers m and n, if m,n are relatively prime (coprime), then φ(mn-o(m)o(n) (ii) Is the converse true? Prove or provide a counter-example.
Prove that if f is a multiplicative arithmetic function then f([m, n])f((m, n)) = f(m)f(n) for...
Prove that if f is a multiplicative arithmetic function then f([m, n])f((m, n)) = f(m)f(n) for all positive integers m and n. Hint: [m, n] is the least common multiple of m and n and (m, n) is the greatest common divisor of m and n.
We begin by formally defining the arithmetic function v(n) first introduced irn Example 1(b). Def...
We begin by formally defining the arithmetic function v(n) first introduced irn Example 1(b). Definition 3: Let neZ with n > 0. The number of positive divisors function, denoted v(n), is the function defined by In other words, v(n) is the number of positive divisors of n. [The notation here is chosen by this author for ease of remembrance: v (lowercase Greek letter nu) represents the "number" of positive divisors. However, the number of positive divisors function is denoted variously...
4) Let D be the set of all finite subsets of positive integers. Define a function...
4) Let D be the set of all finite subsets of positive integers. Define a function (:2 - D as follows: For each positive integer n, f(n) =the set of positive divisors of n. Find the following f (1), f(17) and f(18). Is f one-to-one? Prove or give a counterexample.
T(n) is the number of divisors of n, and u(n)-1 Define an arithmetic function A as...
T(n) is the number of divisors of n, and u(n)-1 Define an arithmetic function A as follows: if p is a prime and k 1 let A(p) log p for all other n, let A(n) 0. (Warning: A is NOT a multiplicative function!) Prove that (A* u)(n) log n for all n. (HINT: consider the various d which divide n expressed in terms of the prime factorization of n
(1) Let f be a multiplicative function satisfying Σ f(d)-n/0(n), where the sum is taken over all positive divisors of n, and ф is Euler's totient function. Use the Mobius inversion formula to prove that f(n) ."(n)/0(n)
(1) Let f be a multiplicative function satisfying Σ f(d)-n/0(n), where the sum is taken over all positive divisors of n, and ф is Euler's totient function. Use the Mobius inversion formula to prove that f(n) ."(n)/0(n)
Lambda(n) denotes the Louisville function (ie the completely
multiplicative function satisfying lambda(p): = -1 for every prime
number p)
Let f be a completely multiplicative function that is not identically zero and suppose that the series F) 28 converges absolutely for Re(s) > ơa. Prove that F(s) 0 and that f(n)x(n) _ F(22) (Re(s) > σα). 28 仁!
Let f be a completely multiplicative function that is not identically zero and suppose that the series F) 28 converges absolutely for...
oblemns for Solution: 1. Recall that Euler's phi function (or called Euler's totient function) φ(n) is defined as the number of integers m in the range 1< m<n such that m and n are relatively prime, i.e., gcd(rn, n) l. Find a formula for φ(n), n 2. (Hint: Factor n as the product of prime powers. i.e., n-TiỀ, where pi's are distinct primes and ei 〉 1, i, where p;'s are distinct primes and e > 1 t.
oblemns for...
C5. Let n EZ. If f is a multiplicative arithmetic function and pi is the prime factorization of n. prove that μ(d)/(d)-| | (1-f(pi)) d n, d>0 For convenience, here's a summary of some potentially useful definitions and facts from our last lecture: For any two arithmetic functions f and g, the convolution of f with g is f(n) * g(n) = (f * g)(n) = dn, d 0 d n, d>0 1 denotes the constant function which maps every...
Exercise 2. Let φ denote the Euler totient function. (i) Prove that for all positive integers m and n, if m,n are relatively prime (coprime), then φ(mn-o(m)o(n) (ii) Is the converse true? Prove or provide a counter-example.
We begin by formally defining the arithmetic function v(n) first introduced irn Example 1(b). Definition 3: Let neZ with n > 0. The number of positive divisors function, denoted v(n), is the function defined by In other words, v(n) is the number of positive divisors of n. [The notation here is chosen by this author for ease of remembrance: v (lowercase Greek letter nu) represents the "number" of positive divisors. However, the number of positive divisors function is denoted variously...
4) Let D be the set of all finite subsets of positive integers. Define a function (:2 - D as follows: For each positive integer n, f(n) =the set of positive divisors of n. Find the following f (1), f(17) and f(18). Is f one-to-one? Prove or give a counterexample.
T(n) is the number of divisors of n, and u(n)-1 Define an arithmetic function A as follows: if p is a prime and k 1 let A(p) log p for all other n, let A(n) 0. (Warning: A is NOT a multiplicative function!) Prove that (A* u)(n) log n for all n. (HINT: consider the various d which divide n expressed in terms of the prime factorization of n
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