Yulia V's user avatar
Yulia V's user avatar
Yulia V's user avatar
Yulia V
  • Member for 10 years, 7 months
  • Last seen more than a month ago
13 votes
Accepted

How to rotate a vector by 90 degree?

9 votes
Accepted

Determinant of $a_{i,j}=(x_i+y_j)^k$

5 votes
Accepted

Solve $y'=1+x-(1+2x)y+xy^2$

5 votes

Integers and integer functions

4 votes
Accepted

Proofs of identity for product of binomial coefficients

4 votes
Accepted

Prove $\min \left\{ x+y:\begin{pmatrix} x \\ y \end{pmatrix} \in M \right\}$ exists

3 votes
Accepted

Probability of a player winning again after i games

3 votes

Integration $I_n=\int_{0}^{1}\frac{dx}{(x^n+1)(\sqrt[n]{x^n+1})}$

3 votes
Accepted

Determinant of the matrix $\binom{m_i}{j-1}$

2 votes

general way to get formula as multiplication.

2 votes

Probability with Multiple Sets and Anti Sets

2 votes

Geometric Derivation of the D-Bar Operator $\frac{\partial}{\partial z} = \frac{1}{2}(\frac{\partial }{\partial x} - i\frac{\partial }{\partial y})$

2 votes

Showing that a multivariable function is one to one

2 votes

Find the range of $k$ in $f(x) = \frac{x^2-k}{x-2}$

2 votes
Accepted

Simplification of Differential Equation

2 votes

Understanding Bernoulli's Inequality

2 votes
Accepted

Prove that if $p$ is a prime and $k$ is an integer, there are two integers $x$ and $y$ that satisfy $x^{2} + y^{2} + k \equiv p$

2 votes

Finding $P(N>E(N))$

2 votes
Accepted

How can we prove that the square root of any number is equal to the statment given below

1 vote
Accepted

gre standard deviation probability

1 vote

How to calculate the limit of f(f(x)) if f(x) is a piecewise function?

1 vote

What happens if $\epsilon$ and $\delta$ are zero in the definition of the limit?

1 vote
Accepted

Buying dogs and Cats and mice

1 vote
Accepted

Thinking about a probability problem in terms of sets.

1 vote

{0,1}-solutions for integer equations via lattice base reduction?

1 vote
Accepted

Probability of a minimum sum of card values when drawing cards from a custom deck

1 vote

Probability about balls and urns

1 vote
Accepted

Integral convergence and limit question

1 vote
Accepted

Remove drift from exponential Weiner process

1 vote

Minimization over two lines