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Seth

Just some guy who likes math.

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Top Questions
30 votes

Can two topological spaces surject onto each other but not be homeomorphic?

general-topology examples-counterexamples asked Jul 11 '12 at 13:40
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18 votes

Do differentiable functions preserve measure zero sets? Measurable sets?

real-analysis measure-theory examples-counterexamples asked Jul 16 '14 at 1:54
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18 votes

Good examples of Lagrange multiplier problems

undergraduate-education calculus problem-design vector-calculus asked Jul 8 '15 at 19:41
matheducators.stackexchange.com

13 votes

Hartshorne II prop 6.9

algebraic-geometry asked Oct 16 '14 at 20:43
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12 votes

Proof of holomorphic Lefschetz fixed point formula using currents in Griffiths and Harris

differential-geometry complex-geometry differential-forms asked Nov 24 '14 at 15:44
math.stackexchange.com

10 votes

Conformal map from punctured disc to disc

complex-analysis asked Aug 22 '12 at 23:57
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9 votes

Hartshorne II prop 6.6

algebraic-geometry asked Oct 15 '14 at 20:41
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7 votes

Prove there is a unique continuous function satisfying this integral equation

real-analysis integral-equations asked Jun 4 '13 at 20:24
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7 votes

Is there a nonempty open bounded subset of plane whose boundary contains no 1 dimensional interval?

general-topology examples-counterexamples asked Mar 20 '14 at 19:42
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6 votes

Why would we expect the pushforward to encode the total derivative of a smooth map?

differential-geometry manifolds asked Oct 16 '12 at 23:03
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Top Answers
22
What's a group whose group of automorphisms is non-abelian?
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21
Abelian groups of order n.
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19
$f: \mathbb{R} \to \mathbb{R}$ that takes each value in $\mathbb{R}$ twice
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14
With regards to vector spaces, what does it mean to be 'closed under addition?'
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11
There exists a unique isomorphism $M \otimes N \to N \otimes M$
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11
In any finite graph with at least two vertices, there must be two vertices with the same degree
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11
Can a set containing $0$ be purely imaginary?
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10
Continuous function a.e.
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9
Does every Noetherian ring contain at least one maximal ideal?
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9
Gradient steepest direction and normal to surface?
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8
Is there an injective continuous map $\mathbb{R}^2 \rightarrow \mathbb{R}$?
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7
$A^2−A=0$, where A is a $9×9$ matrix. Then which is true?
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7
Symbol $\Gamma$ when talking about vector fields.
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7
tensorflow sparse categorical cross entropy with logits
stackoverflow.com

6
What kind of matrix is it that when multiplied with its transpose produces the identity?
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6
Using Rouche's theorem to find number of roots.
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6
Modules over commutative rings
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6
Research in algebra.
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6
A bijection from a disconnected space to a connected space?
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5
Locally lipschitz on $[a,b]$ implies lipschitz
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5
Closed subsets of Lindelöf spaces are Lindelöf
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5
complex analysis multiple choice question
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5
how to visualize binomial theorem geometrically?
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5
A contractible space is path connected.
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5
proving:Lamda is an eigenvalue of T if and only if $T-\lambda \mathrm{I}$ is not injective.
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5
Showing that a function is not meromorphic on $\mathbb{C}$
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5
question about continuity or discontinuity of a function
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5
Show that $R/I$ is a field, where $R$ is a PID , where $I$ is a nonzero prime ideal.
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5
Show $S^2$ is not homeomorphic to the closed unit disk.
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