Michael Medvinsky's user avatar
Michael Medvinsky's user avatar
Michael Medvinsky's user avatar
Michael Medvinsky
  • Member for 8 years, 7 months
  • Last seen this week
14 votes
Accepted

Show that $f'(x) = \lim\limits_{h \rightarrow 0} \dfrac{f(x+h)-f(x-h)}{2h}$

12 votes
Accepted

What does this 'L' and upside down 'L' symbol mean?

8 votes
Accepted

Computing $\int \frac{4\tan(x)+5}{\sin^2(x)+2\cos^2(x)+3\sin(x)\cos(x)} $

8 votes

Linear interpolation with two points

7 votes
Accepted

Multiple choice exercise on $f(x)= \frac {\sin x}{|x|+ \cos x}$

5 votes

The Biharmonic Eigenvalue Problem on a Rectangle with Dirichlet Boundary Conditions

5 votes
Accepted

Proof of reciprocal logarithm

4 votes

What is the value of $ x(\log x)$ when $x=0$ and $x\not \to 0$?

4 votes

Change of variable inside a line integral

4 votes

A System of Matrix Equations (2 Riccati, 1 Lyapunov)

4 votes
Accepted

Analyzing Dynamical System

4 votes
Accepted

chebyshev nodes - formula for general interval

4 votes
Accepted

proving subspace of matrix

3 votes
Accepted

$F(F(x)+x)^k)=(F(x)+x)^2-x$

3 votes
Accepted

Richardson extrapolation: how to derive an approximation for $f'(x)$ with Euler backward/forward methods

3 votes
Accepted

Wave equation boundary condition

3 votes
Accepted

Can you integrate by parts with one integral inside another?

3 votes
Accepted

Nonlinear first order ODE

3 votes

Is there a difference between $(x)^{\frac{1}{n}} $ and $\sqrt[n]{x}$?

3 votes
Accepted

Can Poisson equation be solved numerically in one shot?

3 votes
Accepted

$f(x,y)=\begin{cases} |\frac{y}{x^2}|exp(-|\frac{y}{x^2}|) & , x\ne0\\ 0 & , x=0 \end{cases}$

3 votes

Efficiently find $x(k)$ where $x$ is given by $Ax=b$ and $A$ is tridiagonal

2 votes
Accepted

for what values of the parameter is the matrix diagonazible?

2 votes
Accepted

Maximum value of function $f(x,y) = xy^2$ with constraint $x^2 + y^2 = 8$

2 votes
Accepted

Second order derivative of log of vector

2 votes

Minimizing $f(x)=A^{\frac{tx-1}{x-1}} \left( c^x \frac{\Gamma(0.5+x)}{\sqrt{\pi}} \right)^{\frac{1-t}{x-1}}$ subject to the constraint

2 votes

Harmonic function and Neumann Compatibility Condition

2 votes

Linear dependency of polynomials

2 votes
Accepted

Uniqueness of the solution of a PDE

2 votes

Prove $\max_{\bar \Omega} |\nabla u|^2=\max_{\partial \Omega} |\nabla u|^2$.

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