MathOverflow

Math Overflow. Q&A for professional mathematicians.

Read Mathoverflow.net news digest here: view the latest Math Overflow articles and content updates right away or get to their most visited pages. Mathoverflow.net belongs to a group of fairly successful websites, with more than 458K visitors from all over the world monthly. It seems that Math Overflow content is notably popular in USA, as 32.4% of all users (148K visits per month) come from this country. We haven’t detected security issues or inappropriate content on Mathoverflow.net and thus you can safely use it. Mathoverflow.net is hosted with Stack Exchange, Inc. (United States) and its basic language is English.

  • Content verdict: Safe
  • Website availability: Live
  • English language flagLanguage: English
  • Last check:
  • 15 260

    Visitors daily
  • 54 936

    Pageviews daily
  • 6

    Google PR
  • 24 191

    Alexa rank

Mathoverflow.net news digest

  • 0 days

    The topos of maps that are étale at a given finite set of primes: What are its c...

    This is part of a series of follow-up questions to: Which objects in a topos such as the étale topos are "classifying spaces" of their fundamental groups?. See also Classifying spaces in $\operatorname{Ét}_{\operatorname{Spec}(\mathbb{Z}[x_{1},...,x...

  • 0 days

    Classifying spaces in $\operatorname{Ét}_{\operatorname{Spec}(\mathbb{Z}[x_{1},....

    This is a follow-up to the question: Which objects in a topos such as the étale topos are "classifying spaces" of their fundamental groups?Let $S=\operatorname{Spec}(R)$ be an open subscheme of $\operatorname{Spec}(\mathcal{O}_{K})$ for some Galois extension...

  • 0 days

    Lyapunov Rate of Divergence Approximation Attempted Derivation

    To set this up, I want to give an attempt at a proof of Lyapunov's property that if you take the difference of two trajectories that begin at slightly different points $x_0+\epsilon$ and $x_0$ that you wind up with $\phi_t(x_0+\epsilon) - \phi_t(x_0...

  • 0 days

    Finding a family of solution to a diophantine problem

    I have been working on this diophantine problem:
    $Q^2 - ((6n+3)^2 + t) \cdot Q + 2(6n+3)(36n^3 + 54n^2 + 27n - 4) = 0$
    For arbitrary values of $n$ from $n = 1,2,3,4,5,6,7,8,9,10,11,12,13,14$, the respective desired values of $(Q,t) = (9, 154), (20, 626), (42,1136), (72, 1797), (66, 4958), (156, 3574), (215, 4544), (312, 4936), (354, 7042), (332, 12176), (299, 20804)...

Domain history

Web host: Stack Exchange, Inc.
Registrar: GoDaddy.com, LLC
Registrant: Registration Private (Domains By Proxy, LLC)
Updated: July 07, 2025
Expires: July 14, 2026
Created: July 14, 2009

Whois record

Visitor gender

Male

Female

Safety scores

Trustworthiness

Excellent

Child safety

Excellent