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10 votes

Derivative of an algebraic power series in positive characteristic

ac.commutative-algebra fields power-series asked Jun 23, 2019 at 10:42
mathoverflow.net

9 votes

A series that is rational?

ac.commutative-algebra power-series asked Jul 10, 2020 at 17:06
mathoverflow.net

9 votes

Variant of Hilbert 90 for Galois extensions

ag.algebraic-geometry nt.number-theory galois-theory galois-cohomology asked May 27, 2014 at 5:16
mathoverflow.net

8 votes

Transcendence of the $p$-adic number $\sum_{n\ge0}a^{2^n}$

nt.number-theory p-adic-analysis p-adic-numbers transcend.-number-theory transcendence asked Dec 29, 2016 at 14:51
mathoverflow.net

8 votes

Is the extension Galois if $\mathrm{Aut}(K)$ acts transitively on the non-ramified prime ideals?

abstract-algebra number-theory field-theory algebraic-number-theory galois-theory asked May 22, 2014 at 8:12
math.stackexchange.com

8 votes

Irrationality measure of powers

nt.number-theory diophantine-approximation transcendental-number-theory asked Oct 14, 2020 at 16:30
mathoverflow.net

7 votes

prime dividing no term in a sequence

nt.number-theory prime-numbers asked Dec 9, 2019 at 2:20
mathoverflow.net

7 votes

irrationality of the p-adic exponential

p-adic-analysis irrational-numbers asked Feb 12, 2014 at 2:58
mathoverflow.net

7 votes

Convergence of a $p$-adic series

p-adic-numbers p-adic asked Mar 4, 2019 at 3:30
mathoverflow.net

6 votes

$LCM(q-1,\cdots,q^n-1)=q^{\frac{3}{\pi^2} n^2+o(n)}$

analytic-number-theory asked Jun 1, 2014 at 7:10
mathoverflow.net

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