Mathematics
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Overflowian
  • Member for 8 years, 8 months
  • Last seen this week
  • MathOverflow.
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Score Newest
answer
16
Book recommendation about mathematics
Nov 5, 2017
question
15
Cup and wedge product in singular and de Rham cohomology
Jan 1, 2018
answer
12
What is an instanton? (On a complex surface or a differentiable 4-manifold )
May 20, 2022
answer
12
Since the Curvature tensor depends on a connection (not metric), is it the relevant quantity to characterize the curvature of Riemannian manifolds?
Nov 2, 2017
answer
12
Intuitively, what does it mean that two charts are compatible?
Nov 22, 2017
question
11
Banach space with respect to two norms must be Banach wrt the sum of the norms?
Jul 4, 2017
question
8
Euler characteristic expression in terms the number of fixed points of an $\mathbb{S}^1$ action
Feb 5, 2019
question
8
Is every quotient by a finite group an orbifold?
Dec 16, 2018
answer
7
What makes the hairy ball theorem "hard"?
Nov 27, 2019
answer
7
$X$, $Y$ Hausdorff spaces and $f:X\to Y$, $g:Y\to X$ continuous with $g\circ f=1_X$. Show that $f(X)$ is closed
Nov 17, 2017
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19
Conceptual definition of the extension of a connection to 1-forms
15
Examples of odd-dimensional manifolds that do not admit contact structure
15
Possible mistake in Cohen notes "Immersions of manifolds and homotopy theory" (version 27 March 2022)
11
Classification of bundles, Postnikov towers, obstruction theory, local coefficients
10
About the cohomology of $BG^\delta$. Making a Lie group discrete

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