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Chopin
  • Member for 1 year, 8 months
  • Last seen more than a month ago
  • Paris, France
8 votes
2 answers
390 views

Recursive formula for a tree problem

6 votes
2 answers
128 views

$T_{n}$ a set of all binary trees with $n$ leaves

6 votes
1 answer
111 views

Is there a function $h$ and a constant $c$ to satisfy $h(x-c) \neq O(h(x))$

6 votes
1 answer
180 views

The integral: $\int_0^1(e^x)dx$ via Darboux's sums

5 votes
1 answer
156 views

Consistency of theories with circles

5 votes
1 answer
113 views

Finding a basis for the kernel of the following linear transformation: $T(p(x))=p'(x)$,$T:P_3[\mathbb{R}]\rightarrow P_3[\mathbb{R}]$

5 votes
1 answer
100 views

Recursive formula for a combinatorial problem and define the generating function

4 votes
1 answer
47 views

Finding a basis and dimension for a symmetric matrices subspace

3 votes
1 answer
115 views

Prove that $\vec{u_1}+\vec{u_2},\vec{u_2}+\vec{u_3},...,\vec{u_n}+\vec{u_1}$ is a basis of the vector space $V$, iff $n$ is odd

3 votes
2 answers
173 views

Sequence queue - converges or diverges?

3 votes
2 answers
153 views

Evaluate the integral: $\int_{0}^{\frac{\pi}{2}}\sin (x) dx$ via Darboux's sums

3 votes
4 answers
155 views

Twenty students in a class when they are required to choose a partner

3 votes
0 answers
51 views

Define NFA for the following languages

3 votes
1 answer
86 views

Proving that 3 regular NFA equivalent to NFA

2 votes
3 answers
261 views

Does the graph contain a Hamiltonian and an Euler cycle?

2 votes
1 answer
139 views

About proving that there are infinitely many prime numbers $p$ such that $\mathrm{ord}_p(a)=\mathrm{ord}_p(b)$

2 votes
1 answer
116 views

Determine whether the following improper integral converges or not

2 votes
1 answer
199 views

Finding a closed form for $\sum_{k=0}^{n}k^5$ using generating functions [closed]

2 votes
1 answer
71 views

Solve the following via generating functions

1 vote
0 answers
62 views

Recursive formula for a combinatorial problem

1 vote
0 answers
35 views

Cells and balls question

1 vote
1 answer
89 views

How many perfect matches are there in a graph with $n$ connected components?

1 vote
1 answer
56 views

Let $P_n$ be the set of all balanced strings of $n$ bracket pairs

1 vote
1 answer
39 views

If a key in a red-black tree has exactly one child (which isn't null) then he is always red

1 vote
1 answer
223 views

Can we determine the chromatic number of the union of two graphs

1 vote
0 answers
105 views

Proving the convergence of the sequence $\sum \limits _{n=1}^{\infty}\frac{\sin (n)}{n}$ with comparison test

1 vote
2 answers
64 views

Prove there exist infinite value of $n$ such that $p\mid n2^{n}+1$

1 vote
1 answer
65 views

Let $A$ be a set of $n$ elements and $B$ sets of $n-1$ elements such that $n \in \mathbb{N}$

1 vote
1 answer
79 views

Proving that $-\frac{\pi}{2}\le\int_{-1}^{1}\arctan (x)dx\le \frac{\pi}{2}$

1 vote
1 answer
108 views

Is the following cases function Riemann integrable?