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© 2025 - 2026 Nat Welch. All rights reserved.

#proof

41 posts

  • @math_stackexchange need help with proving,that expression gives natural number for any n value #Math #Proof #NumberTheory

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    Oct 18, 2026
  • @math_stackexchange Proof by contradiction and logical value #Mathematics #Logic #Proof

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    Oct 17, 2026
  • @math_stackexchange Proof $\sum \frac{a^3}{b+c} \ge \frac{a^2+b^2+c^2}{2}$, How about $\sum \frac{a^{k+1}}{b+c} \ge \frac{a^k+b^k+c^k}{k}$ for $k \in N$? #Math #Proof #Inequality

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    Oct 17, 2026
  • @math_stackexchange Prove: Line $KM$ is tangent to circumscribed circle $\Gamma$ #Math #Geometry #Proof

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    Oct 16, 2026
  • @math_stackexchange Prove that a cyclic sequence of positive reals with harmonic means among its terms is constant #Mathematics #Proof #Sequences

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    Oct 16, 2026
  • @math_stackexchange What does proof searching mean from a perspective of PM? #Mathematics #Proof #Research

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    Oct 15, 2026
  • @math_stackexchange How does this proof about closures of zero sets work in Gillman and Jerison? #Mathematics #Topology #Proof

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    Oct 13, 2026
  • @math_stackexchange Particular name for proofs based on axiom schemas #Mathematics #Logic #Proof

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    Oct 12, 2026
  • @math_stackexchange Can Toda's proof of the vector triple product identity be made rigorous? #Mathematics #Algebra #Proof

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    Oct 12, 2026
  • @math_stackexchange Is this a valid proof that every (4\times n) rectangle with (n\ge 11) can be tiled by I-trominoes and Z-tetrominoes? #Mathematics #Tiling #Proof

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    Oct 12, 2026
  • @math_stackexchange Prove that $e^{x^2} + x \ge e^{x} $ #Mathematics #Calculus #Proof

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    Oct 12, 2026
  • @math_stackexchange How to prove $\frac{d}{dt}[\textbf r(f(t))] = f'(t)\textbf r'(f(t))$? #Mathematics #Calculus #Proof

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    Oct 12, 2026
  • @math_stackexchange Help in understanding proof of inverse of adjacency matrix #Mathematics #LinearAlgebra #Proof

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    Oct 11, 2026
  • @math_stackexchange Given two red integers $0\lt m\lt n$, prove that the coloring algorithm terminates in finitely many steps #Mathematics #Algorithm #Proof

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    Oct 11, 2026
  • @math_stackexchange Is there a more concise way to prove that the two generating functions, $P(n)$ and $S(n)$ are integers? #Mathematics #Math #Proof

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    Oct 11, 2026
  • @math_stackexchange How good or bad is this "proof" of $\pi(n) > \sqrt n - 2 $? #Mathematics #Proof #NumberTheory

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    Oct 7, 2026
  • @quanta The Four-Color Theorem Gets a Rare New Proof #Science #Mathematics #Proof

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    Sep 10, 2026
  • @hackernews The Proof Machine (2016) #HackerNews #Tech #Proof

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    Jul 27, 2026
  • @math_stackexchange Gödel constructibles's proof of the axioms #Mathematics #Logic #Proof

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    Jul 19, 2026
  • @lobsters What Happens to Software When Proof is Cheap? #Software #Proof #Video

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    May 12, 2026
  • @math_stackexchange Proof of a recursion-only evaluation of a full-spawn square-tree constant #Mathematics #Proof #Recursion

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    Mar 1, 2026
  • @math_stackexchange Four circles in a star: seeking intuitive proof #Mathematics #Geometry #Proof

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    Feb 25, 2026
  • @math_stackexchange Prove: $7 \mid 5^{2n} + 3 \cdot 2^{5n - 2}, \quad \text{for } n \ge 1 $ [duplicate] #Mathematics #NumberTheory #Proof

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    Oct 12, 2025
  • @math_programming Anyone know of an approachable proof of the Caratheodory-Fejer theorem? #Mathematics #Algorithms #Proof

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    Feb 10, 2025
  • @math_stackexchange Extended Eisenstein's Irreducibility Criterion Proof #Mathematics #Algebra #Proof

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    Dec 29, 2024
  • @math_stackexchange How to prove that $ \ln{G(z+n)}+\ln{Γ(z+n)}=\ln{G(z)} +(n+1)\ln{Γ(z)}+\displaystyle \sum_{k=1}^{n} k\ln(z+n-k) $? #Mathematics #Proof #Algebra

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    Dec 13, 2022
  • @math_stackexchange Need pure geometric solution for proof on $10$-$20$-$40$-$50$ angle problem #Math #Geometry #Proof

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    Apr 9, 2022
  • @math_stackexchange Prove that $\sum_{r=2}^{n} \lfloor n^{1/r} \rfloor = \sum_{r=2}^{n} \left \lfloor \log_{r}(n) \right \rfloor$. #Mathematics #Proof #Algebra

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    Jul 27, 2020
  • @math_stackexchange How do you prove that $\ln(x) = \int_0^\infty \frac{e^{-t}-e^{-xt}}{t}$? #Mathematics #Calculus #Proof

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    Jun 15, 2020
  • @math_stackexchange Prove the difference is more than $n$ and less than $2n$ #Mathematics #Math #Proof

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    Jun 1, 2020
  • @math_stackexchange The proof of van der Corput inequality #Mathematics #Proof #Analysis

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    Aug 14, 2019
  • @math_stackexchange (Dis)Prove $\sum_{i=1}^n\sum_{j=1}^n{(|x_{i}-x_{j}|-|y_{i}-y_{j}|)^2}\geq 4$ #Mathematics #Proof #Algebra

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    May 4, 2019
  • @math_stackexchange Proof that every polygon has at least 2 ears #Mathematics #Geometry #Proof

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    Aug 13, 2018
  • @math_stackexchange How to prove geometrically that the equilateral triangle inscribed inside a circle has the longest perimeter #Mathematics #Geometry #Proof

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    Mar 12, 2018
  • @math_stackexchange Prove $\int_{\Bbb R_+} \frac{1}{1+x} a(x) \mathrm dx > 0$ given $\int_{\Bbb R_+} \frac{1}{x} a(x) dx > 0$ and $\int_{\Bbb R_+} a(x) \mathrm dx = 0$? [closed] #Mathematics #Calculus #Proof

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    Nov 27, 2017
  • @math_stackexchange Prove Leibniz's formula $(uv)^{k} = \sum_{m=0}^{k}\binom{k}{m}u^m v^{k-m}$ by mathematical induction #Mathematics #Proof #Induction

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    Apr 3, 2017
  • @math_stackexchange Possible proof strategy for Sendov conjecture? #Mathematics #Proof #Conjecture

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    Sep 3, 2015
  • @math_stackexchange Suppose that $F$ is a field of characteristic $\neq 2$ and non zero elements of $F$ form a cyclic group under multiplication. Prove that $F$ is finite #Mathematics #Algebra #Proof

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    Jul 5, 2014
  • @math_stackexchange How to prove $(1-\sum_{i=1}^{n}a^3_{i})^{1/3}\cdot (1-\sum_{i=1}^{n}b^3_{i})^{1/3}\ge 1-\sum_{i=1}^{n}a_{i}b_{i}-\sum_{i=1}^{n}|a_{i}-b_{i}|$? #Mathematics #Proof #Algebra

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    May 28, 2014
  • @math_stackexchange A proof that powers of two cannot be expressed as the sum of multiple consecutive positive integers that uses binary representations? #Mathematics #Proof #NumberTheory

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    Dec 27, 2011
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