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
  • 20 986

    Alexa rank

Mathoverflow.net news digest

  • 0 days

    For Collatz on n = 8m+6, is the number of ascent cycles exactly ν₂(m+1)?

    Consider the Collatz function $T(n) = n/2$ if $n$ even, $T(n) = 3n+1$ if $n$ odd.
    Restrict to $n \equiv 6 \pmod{8}$ and write $n = 8m + 6$. For odd $n$, let $C(n) = (3n+1)/2$.
    Observation: For $n = 8m + 6$, the orbit under $T$ takes the form:$$8m + 6 \to 4m + 3 \to 12m + 10 = 2(6m + 5)$$...

  • 0 days

    Quantitative side of Pillai's conjecture

    Pillai's conjecture asserts that for each positive integer $k$, There are only finitely many pairs of numbers $(x^a,y^b)$ with $x,y,a,b$ positive integers $a,b$ greater than $1$, and $x^a-y^b=k$. Assuming it is true, let $S(k)$ be the number of such...

  • 0 days

    Is the $\sqrt{x}$-normalization and logarithmic scaling canonical in the explici...

    Let $\psi(x)$ denote the Chebyshev function and consider the classical explicit formula in the form
    $$\psi(x) - x \sim \sum_{\rho} \frac{x^{\rho}}{\rho}= \sqrt{x} \sum_{\gamma} \frac{e^{i\gamma \log x}}{\tfrac{1}{2}+i\gamma},$$
    where $\rho = \tfrac{1}{2} + i\gamma$ runs over the nontrivial zeros of $\zeta(s)$....

  • 8 months

    Graphical software tools for quick and easy diagrams

    What tools do people use for quickly and easily creating presentable, if not publication quality, diagrams of various kinds?
    When I need to make a high quality diagram, I'm happy to whip up some TikZ. TikZ is great for producing all kinds of publication quality diagrams with consistent typography and fine-grained control. However, in other contexts (e.g., a MO question/answer...

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