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Prime numbers, diophantine equations, diophantine approximations, analytic or algebraic number theory, arithmetic geometry, Galois theory, transcendental number theory, continued fractions

1 vote

Kronecker's Jugendtraum for real quadratic fields?

Hecke started on this area a century ago https://en.wikipedia.org/wiki/Hilbert's_twelfth_problem. As far as I know his ideas have not been taken much further.
მამუკა ჯიბლაძე's user avatar
29 votes
3 answers
4k views

Galois theory timeline

A recent question on the history of Galois theory wasn't the most satisfactory. But the historical issues do seem quite attractive. They relate to innovation, and to exposition. There is a perspective …
0 votes

How to calculate the infinite sum of this double series?

So I think this can be done, in two steps: (1) understand sums of the 1/Q(k, m) for certain integral quadratic forms Q; and (2) express this sum as a linear combination of such sums. The first part …
Charles Matthews's user avatar
2 votes

Circles avoiding rational points of height $\le h$

A possible reformulation? If the equation of the circle is rational, then one rational point implies infinitely many. One sees that via lines of rational slope through the point, or the existence of a …
Charles Matthews's user avatar
1 vote

Time-line until the publicaton of Weil of "Numbers of solutions of equations in finite fields"

The papers by Roquette http://www.rzuser.uni-heidelberg.de/~ci3/rv.pdf, http://www.rzuser.uni-heidelberg.de/~ci3/rv2.pdf, http://www.rzuser.uni-heidelberg.de/~ci3/rv3.pdf and http://www.rzuser.uni- …
Charles Matthews's user avatar
1 vote

Is $x^p-x+1$ always irreducible in $\mathbb F_p[x]$?

There is kind of an easy proof given that Berlekamp's algorithm works? In the notation of https://en.wikipedia.org/wiki/Berlekamp%27s_algorithm, the point is that the space of polynomials g congruen …
Charles Matthews's user avatar
0 votes

property of trace modulo $n$

I'd lay odds on a counterexample. This is going to be a bit vague, but I assume the reason you're looking at a coset is down to Pontryagin duality at the local field level. That it is the coset for a …
Charles Matthews's user avatar
1 vote

Functions about integers which are divisible by all numbers less than or equal to a fraction...

You will end up taking m as around log n/loglog n, asymptotically, by the Prime Number Theorem? So again, your motivation. For small n something less easy to describe but computable will occur. For la …
Charles Matthews's user avatar
8 votes
2 answers
572 views

Proof theory and primitive roots

I have had this question on my mind for two decades. We know, after Heath-Brown, that one out (say) of 3, 5, 7 is a primitive root mod p for infinitely many primes p. We just don't know which one. (We …
2 votes
1 answer
430 views

Weil reciprocity on abelian varieties and biextensions?

I was once told, by someone who would likely be right about such things, that the version of Weil reciprocity for abelian varieties (as in Lang, Abelian Varieties) should come out of consideration of …
9 votes

What is the geometry of an undecidable diophantine equation?

You have a typical recursively enumerable set S of integers, and a set X of lattice points cut out by a multivariate polynomial. We are talking about S being the projection (onto one axis) of X. Given …
Charles Matthews's user avatar
7 votes

How does "modern" number theory contribute to further understanding of $\mathbb{N}$?

A short answer: the kind of "structure" recognised in the analytic number theory of the period 1900 to 1930, successful as that theory was, doesn't go far enough. You need at least functions of severa …
Charles Matthews's user avatar
7 votes

How should an analytic number theorist look at Bessel functions?

From the point of view of analytic number theory, the point usually would be asymptotic behaviour. This is typically well understood, and is in the massive book of Watson. Apart from that, yes, numero …
Charles Matthews's user avatar
0 votes

An estimate of the sum related to primes

It looks to me like the intended method is to use the loglog divergence of the sum of the reciprocals of the primes on the first sum, and then presumably the Prime Number Theorem with error term on th …
Charles Matthews's user avatar
4 votes

Unsolved problem related Gauss sum and root of unity.

Yes. The determination of Gauss sums with characters of prime order at least 5 is an unsolved problem.
Charles Matthews's user avatar

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