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Riccardo.Alestra's user avatar
Riccardo.Alestra's user avatar
Riccardo.Alestra
  • Member for 12 years, 3 months
  • Last seen more than a week ago
  • Rome, RM, Italia
77 votes
Accepted

What's the difference between stochastic and random?

9 votes

Does $z^i=i^z$ have any solutions, beside $z=i$?

9 votes

How large should $a$ be so that $\int_a^{\infty} \frac{dx}{1+x^2} < \frac{1}{1000}$

8 votes

Why doesn't $1/x=0$ have any solution?

7 votes

Evaluating the derivative of $\large \;e^{e^x}$?

6 votes

Optimization with cylinder

5 votes
Accepted

Sum $ \sum_{k=0}^{\infty} \frac{x^k}{k!k!} = ? $

5 votes
Accepted

Is the Entropy a Function or a Functional?

3 votes

Double Angle Equations

3 votes

Find the area of an equilateral triangle given the distances from an interior point to the vertices

3 votes

Find the minimum value of this integral.

3 votes

Application of derivative - helicopter problem

3 votes

What is sum of reciprocal?

3 votes

Inquiries concerning the series expansion of the floor function

3 votes

whether $\sum a+\sum b=\sum (a+b)$ is correct or not

3 votes
Accepted

How find the $a_{n}$ close form

3 votes

How can the roots of $x^4 - 16 = 0$ be $2$, $-2$, $-2i$ and $2i$?

3 votes
Accepted

Where does the "inertia" term come from?

2 votes

Finding the local minimum of $e^{3x} + e^{-x}$

2 votes

How do you find the exact value of $\cos(\operatorname{arcsin}(\frac{-4}{5}))$?

2 votes

Compute the first six terms of the following sequences (start with n = 1):

2 votes
Accepted

Is there a way to express matematically that B is closer to A than C is to A?

2 votes

Finit Sum $\sum\limits_{i=1}^{100}i^8-2 i^2$

2 votes
Accepted

What is the maximum value of $4(\sin x)^2 + 3(\cos x)^2$

2 votes

time-frequency domain

2 votes
Accepted

Finding a geodesic on a plane using polar coordinates

2 votes

13 DOF Kalman filter

2 votes

Any fastest algorithm for $f(n) = f(n-1) \cdot f(n-2)$ where $3 \leq n \leq 1000000$

2 votes

Probability question (two draws)

2 votes

Indeterminate vs Infinite

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