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hengxin
  • Member for 9 years, 6 months
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20 votes

Projection map being a closed map

8 votes

Is projection of a closed set $F\subseteq X\times Y$ always closed?

4 votes

Does the definition of linear code implies that $E(c_1 + c_2) = E(c_1) + E(c_2)$ for encoding function $E$?

3 votes

How to evaluate this binomial sum?

2 votes

How to prove that the uniform topology is different from both the product and the box topology?

1 vote

Topology - Open Neighborhood Systems

1 vote

Prove that the unit circle is path-connected?

1 vote

Finding recurrence and an algorithm to represent it

1 vote

Solving matrix equation $AX = B$

1 vote

Interesting problems using group/representation theory

1 vote

Why are there at most 24 rotational symmetries of a cube?

1 vote
Accepted

Question about the proof of the diamond isomorphism theorem on modular lattice

1 vote

Mutually exclusive events

0 votes

Probability calculation involving order statistics

0 votes

Matrix size for error-correcting linear code

0 votes
Accepted

(Strong) Duality for the integer programming for $\text{gcd}(c_1, c_2, \ldots, c_n)$

0 votes
Accepted

Given $H \le G$ and $P \in \text{Syl}_{p}(G)$, to show that $\exists a \in G, aPa^{-1} \cap H \in \text{Syl}_{p}(H)$.

0 votes

Probability number comes up before another