AlvinL's user avatar
AlvinL's user avatar
AlvinL's user avatar
AlvinL
  • Member for 8 years, 11 months
  • Last seen this week
  • Tartu, Estonia
19 votes
3 answers
623 views

Semigroups with no morphisms between them

7 votes
1 answer
2k views

Epsilon-delta definitions, inequality strict / non-strict?

7 votes
3 answers
8k views

Sufficient condition for graph isomorphism assuming same degree sequence

7 votes
1 answer
235 views

Proof by induction, utilizing inductive assumption

6 votes
1 answer
110 views

Counting the amount of desirable colourings

6 votes
2 answers
203 views

Algebra operations as natural transformations

5 votes
1 answer
177 views

Metrically Cauchy vs. Topologically Cauchy

5 votes
3 answers
221 views

Homework: limit of $\frac{1}{n}\sqrt[n]{\prod_{k=1}^n(n+k)}$ as $n\to\infty$

5 votes
2 answers
5k views

Derivative of $\ln (z), z\in\mathbb{C}$

5 votes
3 answers
4k views

Counting the number of maximal chains in a poset

5 votes
1 answer
90 views

Convergence of directed family in topological space

4 votes
2 answers
405 views

Number of all of finite monotone sequences

4 votes
2 answers
321 views

First passage time in Brownian motion

4 votes
1 answer
2k views

Strong convexity of quadratic functional $x\mapsto \|Ax-b\|^2$

4 votes
1 answer
349 views

Convexity of a functional on a Sobolev space

3 votes
2 answers
1k views

Monotone increasing sequence converging probability wise implies convergence almost surely

3 votes
1 answer
121 views

If mapping is a homomorphism, then cardinality of ring is uniquely determined

3 votes
1 answer
3k views

Green's theorem, double integral over a triangle

3 votes
1 answer
234 views

Constraints of $n$-dimensional cylinder inside sphere

3 votes
1 answer
108 views

Inverse of a product in semigroup

3 votes
1 answer
795 views

Tensor product of injective linear maps

3 votes
2 answers
119 views

Difference between seemingly identical statements

3 votes
1 answer
203 views

Well ordering on the quotient of well ordered sets

3 votes
4 answers
427 views

Determine minimal polynomial over a field

3 votes
1 answer
1k views

Ring (without identity) of characteristic $n$ contains elements of any order $k$ dividing $n$

3 votes
4 answers
180 views

If a prime $p>2$ is expressible as $p=a^2+b^2$, then $4\mid (p-1)$

3 votes
2 answers
601 views

What is $\,a\bmod 63\,$ if $\,a\,$ is both a square and a cube?

3 votes
3 answers
2k views

Laurent series of function, partial fraction decomp. problem

2 votes
2 answers
227 views

Determine if each coefficient of polynomial is congruent to $0$ modulo $p$

2 votes
2 answers
596 views

If primitive root modulo $mn$, then primitive root modulo $m$ and $n$

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