List questions from totient-function

Published on 11 Jan 2019 - 11:57

69

Views

A question concerning higher residues (quadratic and so on)

Published on 11 Jan 2019 - 20:57

1.2k

Views

Expression for the inverse of Euler's totient function $\phi^{-1}$

Published on 25 Mar 2026 - 7:48

89

Views

Direct passage from $n$ prime to $n$ non-prime in Euler Totient Function $\Phi$

Published on 15 Jan 2019 - 8:17

1.1k

Views

Which of these numbers could be the exact number of elements of order $21$ in a group?

Published on 25 Mar 2026 - 6:07

519

Views

Is the multiplicative group $\Bbb Z_{36}^\times$ cyclic?

Published on 22 Jan 2019 - 19:17

166

Views

Is the function $f(n)=\varphi(n)+\varphi(n+1)-n$ surjective?

Published on 23 Jan 2019 - 14:16

91

Views

For which even integers $k$ has $\varphi(n+1)-\varphi(n)=k$ a solution?

Published on 25 Jan 2019 - 12:47

588

Views

How do I find the last digit of a large exponent?

Published on 27 Jan 2019 - 14:06

270

Views

Are these limits correct? $\lim_{n\to \infty}\text{sup} \frac{\lambda (n)}{n}=1$ and $\lim_{n\to \infty}\text{inf} \frac{\lambda (n)}{n}=0$ exist?

Published on 22 Mar 2026 - 20:31

224

Views

Asymptotic formula for $\sum_{k=1}^n \frac{1}{\varphi(k)}$?

Published on 28 Jan 2019 - 10:34

85

Views

Lower bounds for totient function of a Carmichael number

Published on 23 Feb 2026 - 1:25

45

Views

Question about conservation( unchangingness ) of order of modular multiplicative cycle when cycle is multiplied by relatively prime number.

Published on 23 Feb 2026 - 12:08

433

Views

Euler's Totient Function and Residue Classes

Published on 08 Feb 2019 - 16:29

186

Views

Regarding square-free integers and Euler's function

Published on 13 Feb 2019 - 20:28

List Question

On numbers with small $\varphi(n)/n$

A question concerning higher residues (quadratic and so on)

Expression for the inverse of Euler's totient function $\phi^{-1}$

Direct passage from $n$ prime to $n$ non-prime in Euler Totient Function $\Phi$

Which of these numbers could be the exact number of elements of order $21$ in a group?

Is the multiplicative group $\Bbb Z_{36}^\times$ cyclic?

Is the function $f(n)=\varphi(n)+\varphi(n+1)-n$ surjective?

For which even integers $k$ has $\varphi(n+1)-\varphi(n)=k$ a solution?

How do I find the last digit of a large exponent?

Are these limits correct? $\lim_{n\to \infty}\text{sup} \frac{\lambda (n)}{n}=1$ and $\lim_{n\to \infty}\text{inf} \frac{\lambda (n)}{n}=0$ exist?

Asymptotic formula for $\sum_{k=1}^n \frac{1}{\varphi(k)}$?

Lower bounds for totient function of a Carmichael number

Question about conservation( unchangingness ) of order of modular multiplicative cycle when cycle is multiplied by relatively prime number.

Euler's Totient Function and Residue Classes

Regarding square-free integers and Euler's function

Trending Questions

Popular # Hahtags

Popular Questions