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Mathematics
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penny
  • Member for 5 years, 10 months
  • Last seen more than 2 years ago
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5
The direct limit of $A_{f}$ for $f \notin P$ is $A_{P}$
Dec 26, 2020
4
Show that a subspace is dense in $L^2[0,1]$
Sep 14, 2018
4
Why are local diffeomorphisms between spheres are actually diffeomorphism
May 23, 2019
4
What does $\nabla^j$ mean in Riemannian geometry?
Jul 10, 2019
3
Is the $C^{\infty}$ topology dependent on coordinates?
Apr 27, 2020
3
Why are homogeneous polynomials sections of $\mathcal{O}(k)$
May 5, 2020
3
How many negative eigenvalues can a $3 \times 3$ symmetric matrix have?
Sep 7, 2021
2
What is $S^1 \times S^3$ with an open disk removed?
Jun 6, 2019
2
Show that faithful action of groups of order $128$ on sets of order $8$ are isomorphic
Jun 14, 2019
2
Adjunction formula for holomorphic submersion
Mar 5, 2021
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5
Does big and nef imply projectivity?