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Nov
4
revised If a sequnce $(a_n)_n \to L$, $(\sqrt{a_n})_n \to \sqrt L$
edited tags
Nov
3
revised Can gluing of morphisms of locally ringed spaces be expressed by an exact sequence?
added 67 characters in body
Nov
2
revised Hartshorne, exercise II.2.18: a ring morphism is surjective if it induces a homeomorphism into a closed subset, and the sheaf map is surjective
deleted 192 characters in body
Oct
31
revised If $f^n$ is mixing then $f$ is mixing?
added 277 characters in body
Aug
19
revised Construction of a Hausdorff space from a topological space
edited body
Aug
10
revised Is a covering space of a manifold second countable?
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Jul
2
revised Homotopy of spheres $\pi_{n+1}(S^n) \simeq \mathbb{Z}_2$
added 4 characters in body
May
10
revised Evaluate $\int_0^{\pi \over 3} \sec x\tan x\sqrt {\sec x + 2} \, dx $ using a substitution of your choice
edited title
Apr
16
revised There is an orthogonal projection of a subspace onto a canonical subspace that is an isomorphism
added 77 characters in body
Apr
16
revised Is vector subtraction commutative?
deleted 2 characters in body; edited title
Apr
15
revised There is an orthogonal projection of a subspace onto a canonical subspace that is an isomorphism
edited title
Mar
24
revised Does a diffeomorphism between the interiors of two manifolds extend to the manifolds?
added 115 characters in body
Mar
23
revised Open subsets in a manifold as submanifold of the same dimension?
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Feb
5
revised The standard connection in a regular surface is symmetric
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Jan
29
revised Does the gradient always point outward of a level surface?
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Jan
28
revised Does the gradient always point outward of a level surface?
added 176 characters in body
Jan
21
revised If $\operatorname{dim} M > \operatorname{dim} N$, is there an injective smooth map $M\to N$?
edited tags
Jan
17
revised When do regular values form an open set?
added 2 characters in body
Jan
17
revised When do regular values form an open set?
deleted 141 characters in body
Jan
17
revised When do regular values form an open set?
added 319 characters in body