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Jessica B's user avatar
Jessica B's user avatar
Jessica B's user avatar
Jessica B
  • Member for 11 years
  • Last seen more than 1 year ago
23 votes

How far can one get in analysis without leaving $\mathbb{Q}$?

21 votes

Prove that the symmetric group $S_n$, $n \geq 3$, has trivial center.

10 votes

Good book for self study of a First Course in Real Analysis

8 votes

What is a short exact sequence telling me?

7 votes

Quotient of polynomials, PID but not Euclidean domain?

6 votes

Understanding mathematical texts

5 votes

What are some theorems that currently only have computer-assisted proofs?

4 votes

Is there a general product formula for $\sum\limits_{k=1}^{n} k^p$

4 votes

One lily pad, doubling in size every day, covers a pond in 30 days. How long would it take eight lily pads to cover the pond?

4 votes

Real numbers and positive real numbers have same cardinality

3 votes

Is there a name for a lattice that is isomorphic to its dual?

3 votes

Is proving sequential continuity more difficult than proving continuity?

3 votes

Inverse of a nonempty subset

3 votes
Accepted

What is required to establish the law of cosines?

3 votes
Accepted

Whats the mathematics behind this type of taking the rope out puzzle.

3 votes
Accepted

Exercises on nets

3 votes
Accepted

How do I *formally* get informations from a presentation for a group?

2 votes

Sequence of increasing compact sets

2 votes
Accepted

Is every CW complex homotopic to a Delta-Complex?

2 votes

Prove a graph Containing $2k$ odd vertices doesn't contain $k-1$ distinct paths.

2 votes
Accepted

A question about the automorphism group of $\mathbb{Z}_{2} \times \mathbb{Z}_{4}$

2 votes

Basis for the subspace w spanned by ${v_1,v_2,v_3,v_4}$.

2 votes
Accepted

Equivalence of definitions of multivariable differentiability

2 votes

Get Rotation in degrees (0-360) from a rotated angle?

2 votes

If we know the fundamental group of $X$, we know the fundamental group of $X/\sim$

2 votes
Accepted

if $f_n$ uniformly convergent on $D$ and each $f_n$ bounded then $f_n$ is uniformly bounded

2 votes

Graph Theory, with algorithms like kruskal and something more

2 votes

Algebra clock problem

2 votes

How to define a topological tunnel?

2 votes
Accepted

Find $n(A \cap B)$