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Petar Ivanov
  • Member for 11 years, 1 month
  • Last seen more than 6 years ago
  • Redwood City, CA
17 votes
Accepted

Zeroth homotopy group: what exactly is it?

9 votes
Accepted

Find a way out in $8 \times 8$ square

6 votes
Accepted

Counterexample or proof of 2-tuple set uniqueness

4 votes

Let $n ∈ N, n ≥ 1$. Prove that $4^n + 6n - 1$ is divisible by $9$.

3 votes
Accepted

Show that among all triangles with fixed $s$ and $a$, the area is maximised when $b=c$.

3 votes
Accepted

Find 10th term of sequence based on sum of sequence and 8th term

2 votes

Does the given vector space form a basis?

2 votes

What is the value of $\frac{\sin x}x$ at $x=0$?

2 votes

(N,+) and (N,*) aren't isomorphic

2 votes
Accepted

What is $\liminf_{x\to y}f(x)$?

2 votes
Accepted

Solve the following complex numbers problem

2 votes

Surface Area of Rectangular Block

1 vote

Limit of a sequence

1 vote
Accepted

Throwing 8 sided dice 3 times with the sum of the throws being 6, whats the probability that the first throw was 3?

1 vote

$A\in M_n$ is nonsingular, $A = BU$, and $U$ is unitary $\Rightarrow $ $A\overline A = B\overline B $

1 vote
Accepted

Reciprocal Polynomial

1 vote
Accepted

The distance between two points given distances that bees meet in two different time intervals

1 vote
Accepted

Probabilty of drawing atleast 1 red ball in 3 attempts.

1 vote

Open Sets: A Real Life Example

0 votes
Accepted

Find LHS for Induction : Total number of triples selected from N items = N(N-1)(N-2)/6

0 votes

How to convert $((x\land y)\lor(z\land u))\land((x\land\neg z)\lor (\neg y \lor u))\land((y\land z)\lor(x\land u))$ to the disjunctive normal form?

0 votes

What is the definition of a branch of a function in complex analysis

0 votes

How to determine dimensions of a square based prism

0 votes

Prove: If ab is a region in C, then ext ab is open.

0 votes

Solution for $\frac{8(9^n)}{8(9^n)+2(4^n)} \gt 0.99$