Skip to main content
Vizuna's user avatar
Vizuna's user avatar
Vizuna's user avatar
Vizuna
  • Member for 9 years, 6 months
  • Last seen more than 5 years ago
15 votes
3 answers
32k views

Definition of a bounded sequence

13 votes
1 answer
3k views

Prove that any subfield of $\mathbb C$ must contain $\mathbb Q$

6 votes
2 answers
12k views

Finding the number of divisible integers in the range $[1, 1000]$.

4 votes
1 answer
3k views

Prove that every connected undirected graph with n vertices has at least n-1 edges.

4 votes
2 answers
1k views

Is the greatest common divisor injective? Is it bijective?

3 votes
2 answers
390 views

How do I evaluate this integral by substitution?

3 votes
0 answers
107 views

Question on expected gain (probability)

3 votes
3 answers
6k views

Probability of obtaining a double six in at least two throws

3 votes
3 answers
107 views

Proof of a limit of a sequence

3 votes
4 answers
4k views

Proof of an inequality by induction: $(1 + x_1)(1 + x_2)...(1 + x_n) \ge 1 + x_1 + x_2 + ... + x_n$

3 votes
1 answer
1k views

Maximum number of edges in bipartite subgraph of $K_n$

3 votes
1 answer
387 views

Show that $f$ is continuous at exactly one point

2 votes
3 answers
231 views

Combinatorial Proof of a Simple Identity

2 votes
3 answers
383 views

Prove that $\sum_{r=1}^n r\binom n r^2 = n\binom{2n-1}{n-1}$ [duplicate]

2 votes
0 answers
56 views

Verification of a trivial proof

2 votes
2 answers
76 views

Proof of a limit inequality

2 votes
1 answer
204 views

Need confirmation for my thought process on a combinatorial question

2 votes
1 answer
1k views

Matrix multiplication split along the columns of the second matrix

1 vote
1 answer
105 views

Need help on a proof involving the size of prime factors

1 vote
2 answers
2k views

Simple proof by contradiction in graph theory

1 vote
1 answer
55 views

Proving or disproving the existence of a vector space

1 vote
2 answers
336 views

Proof of connectedness in a simple graph

1 vote
1 answer
10k views

Minimum number of edges to ensure connectedness

1 vote
0 answers
74 views

Check if my working is correct

1 vote
1 answer
51 views

How do I integrate this expression?

1 vote
4 answers
4k views

Prove that f is a constant function.

1 vote
1 answer
442 views

Prove that the sequence $(b_n)$ converges

1 vote
1 answer
3k views

Proof of the second principle of mathematical induction

1 vote
4 answers
239 views

Prove that every natural number takes one of three forms

1 vote
2 answers
697 views

Constructing a recurrence relation regarding binary sequences