Skip to main content
MathOverflow

Excavator

 Excavator
Edit first post that was inactive for 6 months.
Awarded 1745 times.
Counterexamples concerning $\infty$-topoi with infinite homotopy dimension
Awarded Mar 22, 2022 at 6:26
M-bases for $C(K)$-spaces, $K$ -scattered
Awarded Mar 21, 2022 at 4:42
Universal approximation theorem for whole $\mathbb{R}^d$
Awarded Mar 11, 2022 at 4:11
Asymptotic expansion of the Schrödinger kernel?
Awarded Mar 10, 2022 at 4:30
The kernel of all invariant means
Awarded Mar 8, 2022 at 5:11
Number of polynomial terms for certain degree and certain number of variables [closed]
Awarded Feb 26, 2022 at 4:04
For a continuous function $f:\mathbb{R}^{+}\to\mathbb{R}^{+}$ does $(f(x)-f(y)) (f(\frac{x+y}{2}) - f(\sqrt{xy}))=0$ imply that $f$ is constant?
Awarded Feb 24, 2022 at 4:08
Subwords of the Fibonacci word
Awarded Feb 21, 2022 at 5:04
Flatness and local freeness
Awarded Feb 21, 2022 at 5:04
Is $\mathcal{D} \bigl( \mathrm{QCoh}(\mathfrak{X}) \bigr)$ compactly generated?
Awarded Feb 18, 2022 at 5:31
Is $2^n$ a Friedman number for all $n>9$?
Awarded Feb 17, 2022 at 5:01
On a Hirzebruch surface
Awarded Feb 4, 2022 at 5:07
Is Li(x) the best possible approximation to the prime-counting function?
Awarded Feb 1, 2022 at 6:42
Characterize P^NP (a.k.a. Delta_2^p)
Awarded Jan 28, 2022 at 4:31
How to prove that two univariate polynomials are always algebraically dependent?
Awarded Jan 24, 2022 at 4:57
Norm of the upper triangular part of symmetric matrix
Awarded Jan 20, 2022 at 5:42
Maximal ideals in the ring of continuous real-valued functions on ℝ
Awarded Jan 13, 2022 at 4:25
Generalization of friendship theorem:n vertices, any m vertices have exactly one neighbor
Awarded Jan 11, 2022 at 4:56
Space of $(1,0)$-holomorphic forms on a Riemann surface
Awarded Jan 8, 2022 at 4:21
Fixed point scheme of finite group Cohen-Macaulay?
Awarded Jan 6, 2022 at 5:20
Major mathematical advances past age fifty
Awarded Jan 3, 2022 at 4:47
What does reduction of structure group of principal bundle say?
Awarded Jan 2, 2022 at 4:57
Book about fluid dynamics
Awarded Jan 2, 2022 at 4:57
Birationally transforming a quartic elliptic curve
Awarded Dec 30, 2021 at 5:51
When I can safely assume that a function is a Laplace transform of other function?
Awarded Dec 24, 2021 at 4:22
How can category theory help my research in set theory?
Awarded Dec 23, 2021 at 4:21
Pushforward of line bundle under "toric isogeny"
Awarded Dec 23, 2021 at 4:21
Is there a necessary and sufficient condition for the tangent bundle of a fiber bundle to be trivial?
Awarded Dec 23, 2021 at 4:21
College (Euclidean) geometry textbook recommendations
Awarded Dec 22, 2021 at 4:04
When is the pushforward of a vector bundle still a vector bundle?
Awarded Dec 18, 2021 at 4:26
What characterizes rational functions with nonnegative integer Taylor coefficients?
Awarded Dec 16, 2021 at 4:11
Occurrences of (co)homology in other disciplines and/or nature
Awarded Dec 11, 2021 at 4:56
How should I be thinking about object classifiers / universal fibrations / universes?
Awarded Dec 9, 2021 at 4:58
Induction step in Bóna and Ehrenborg's proof that the generating function of the alternating runs has -1 as a root of a certain multiplicity
Awarded Dec 6, 2021 at 4:21
Counterexample to Sard's theorem for a non-C1 map
Awarded Dec 5, 2021 at 5:36
Free category with product and coproduct
Awarded Nov 26, 2021 at 6:16
Ito's lemma in differential form
Awarded Nov 24, 2021 at 5:52
Is an abelian group of bounded exponent $\aleph_0$-categorical
Awarded Nov 23, 2021 at 4:32
Examples of back of envelope calculations leading to good intuition?
Awarded Nov 21, 2021 at 4:40
Discrete Morse theory and existence of minimal complex
Awarded Nov 17, 2021 at 5:15
Examples of non-metrizable spaces
Awarded Nov 13, 2021 at 4:25
Best algebraic geometry textbook? (other than Hartshorne)
Awarded Nov 9, 2021 at 4:12
Examples of topoi that are not ordinary spaces
Awarded Nov 3, 2021 at 4:02
This sum over partitions has unexpectedly nice denominators
Awarded Nov 1, 2021 at 5:55
What does ramification have to do with separability?
Awarded Oct 23, 2021 at 4:33
Computer algebra errors
Awarded Oct 23, 2021 at 4:33
Is a torsion-free abelian group finitely generated, if all of its localizations at primes $p$ are finitely generated over $\mathbb{Z}_p$?
Awarded Oct 23, 2021 at 4:33
Is there a rate of convergence for Donsker's theorem?
Awarded Oct 15, 2021 at 5:05
Can there be computable non-standard models of PA in a weaker sense?
Awarded Oct 13, 2021 at 5:18
Methods for proving non FO definability
Awarded Oct 12, 2021 at 4:06
Eigenvalue perturbation theory via Feynman diagrams
Awarded Oct 9, 2021 at 4:16
When do generizations ("generalizations") lift uniquely?
Awarded Oct 8, 2021 at 4:50
When are probability distributions completely determined by their moments?
Awarded Oct 6, 2021 at 4:27
The relation between group cohomology and the cohomology of the classifying space
Awarded Oct 1, 2021 at 4:33
How to rearrange only negative part of a conditionally convergent series to get any sum greater then initial?
Awarded Sep 27, 2021 at 4:05
definition of the end of a manifold?
Awarded Sep 24, 2021 at 5:03
Most helpful math resources on the web
Awarded Sep 22, 2021 at 4:31
How should one approach tropical mathematics?
Awarded Sep 14, 2021 at 5:55
(post deleted or otherwise unavailable)
Awarded Sep 13, 2021 at 4:51
Which journals publish expository work?
Awarded Sep 13, 2021 at 4:51
1
…
3 4
5
6 7
…
30