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The Substitute
  • Member for 10 years, 8 months
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14 votes
1 answer
823 views

Classification of all 28 Exotic 7-Spheres

11 votes
3 answers
11k views

Outer measure of a union of 2 subsets of disjoint measurable sets of real numbers.

10 votes
2 answers
645 views

If GCD $(a_1,\ldots, a_n)=1$ then there's a matrix in $SL_n(\mathbb{Z})$ with first row $(a_1,\ldots, a_n)$

9 votes
2 answers
742 views

False notion of Limit in Stewart's "Calculus"

8 votes
3 answers
1k views

Convergence in the Box Topology.

8 votes
3 answers
8k views

Computing Infinite Continued Fractions

7 votes
1 answer
3k views

Terminology: Independent Copy of Random Variables

7 votes
1 answer
146 views

Does a Sequence have these properties?

6 votes
0 answers
334 views

Finding a Formula for a Sum

6 votes
1 answer
189 views

Checking if Tedious Limit is $0$.

6 votes
1 answer
421 views

Struggling with an Application of Rouche's Theorem

6 votes
1 answer
447 views

Evaluating $\int_0 ^{\infty}\frac{dx}{x^{1/3}(1+x)}$ using Complex Analysis

6 votes
2 answers
187 views

Proving or Disproving the Existence of a Function on the Unit Disc

6 votes
2 answers
344 views

Mistake in Khinchin's "Continued Fractions"

5 votes
3 answers
3k views

Determining if a recursively defined sequence converges and finding its limit

5 votes
1 answer
909 views

Is this partial converse of the excision property for outer measure true?

5 votes
2 answers
908 views

The complement of a torus is a torus.

5 votes
5 answers
627 views

Is the set of all rationals with denominators less than $10^6$ closed in $\mathbb{R}$?

5 votes
3 answers
4k views

Two Formulas for Radius of Convergence of power series.

5 votes
2 answers
897 views

Showing Sylow $p$-groups are Abelian if $n_p=2p+1$

5 votes
1 answer
4k views

Groups of Order 12 aren't Simple

5 votes
1 answer
2k views

Determining the Number of Zeros of a (Holomorphic) Polynomial $f:\mathbb{C}\to\mathbb{C} $ in each Quadrant.

5 votes
0 answers
251 views

If $f$ is integrable, then $\sum\limits_{n\ge 1}\frac{1}{\sqrt n}\vert f(x-\sqrt n)\vert$ is almost everywhere finite

5 votes
1 answer
110 views

Moving from one Coupling to another

5 votes
2 answers
376 views

Upper Bound for Finite Euler Product

4 votes
1 answer
156 views

Distribution of Irreducible Factors of Polynomials over $\mathbb{F}_2$

4 votes
1 answer
238 views

Summing $\sum\frac{1}{i}$ with two constraints on $i$

4 votes
1 answer
99 views

Determining if a Continuous $u:\mathbb{C}\to \mathbb{R}$ Satisfying some Property is Harmonic

4 votes
1 answer
525 views

If $f:D\to D-\lbrace 0 \rbrace$ is Holomorphic with $f(0)=1/2,$ then $\vert f(1/2)\vert\ge 1/8$

4 votes
2 answers
134 views

Showing that the Field Extension $\mathbb{Q}(T^{1/4})/ \mathbb{Q}(T)$ is not Galois

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