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Paddling Ghost's user avatar
Paddling Ghost's user avatar
Paddling Ghost
  • Member for 9 years, 5 months
  • Last seen more than 1 year ago
12 votes

Express 99 2/3% as a fraction? No calculator

9 votes

Find $n$, where its factorial is a product of factorials

9 votes

induction proof over graphs

8 votes
Accepted

Prove that every $k$-chromatic graph has size $m\geq \binom k2 $

7 votes

Show that if $A\subseteq B$, then inf $B\leq$ inf $A\leq$ sup $A \leq$ sup $B$

6 votes
Accepted

What is meant by $sup(A\cup B )$

4 votes
Accepted

$\alpha$-critical graphs and chordless odd cycles

4 votes
Accepted

How to draw the 5 dimensional hypercube graph with 56 edge crossings?

4 votes

Is a cycle a path?

4 votes

Prove that if $deg (v) > \frac{k}{2}$ for every $v \in V(G)$ then $G$ is Hamitonian.

3 votes
Accepted

Proving a sequence formula using induction

3 votes

Calculate $\lim\limits_{n\to\infty}x_n$ where $x_{n+1}=2 x_n^2-1$.

3 votes
Accepted

What is Graph Isomorphism and Graph Invariant?

3 votes
Accepted

how can I proof that a graph with 2n vertices is bipartite

3 votes
Accepted

Longest path technique of proving a graph theory problem

2 votes

maximal planar bipartite graphs

2 votes

Graph Theory - what are related fields in maths?

2 votes

A nontrivial tree such that its complement is a maximal planar graph

2 votes
Accepted

Probability of not appearing a side of a dice

2 votes
Accepted

Easy: Graphs of Straight Line

2 votes

Proof that the square root of $5$ is not a natural number

1 vote

Is a graph a contraction of itself?

1 vote
Accepted

Find the object's acceleration each time the velocity is zero (differentiation problem)

1 vote

How much must the edge length (side) of the cube decrease from $20$cm to reduce the volume by $12$cm$^3$

1 vote

A question about the proof of Schwarz inequality

1 vote
Accepted

How to determine lexicographically the smallest Prüfer-Code of a spanning tree?

1 vote
Accepted

Computing limit of probability- Central Limit Theorem.

1 vote
Accepted

Prove that the number of edges is a multiple of 3 if each vertex has a degree that is either a multiple of 6 or 9

1 vote

How do I show $1$ is not a trivial odd perfect number?

1 vote

Expected number of cards drawn before drawing a $4$ or $5$