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Empiricist's user avatar
Empiricist's user avatar
Empiricist's user avatar
Empiricist
  • Member for 9 years, 7 months
  • Last seen more than 3 years ago
71 votes
Accepted

Is it possible to construct a sequence that ends in 1000000000?

29 votes
Accepted

Derivative of the $l_p$ norm

24 votes

How do I prove that a matrix is a rotation-matrix?

22 votes
Accepted

Shouldn't this function be discontinuous everywhere?

20 votes
Accepted

Expansion of the square of the sum of $N$ numbers

19 votes
Accepted

Proof that the intersection of any finite number of convex sets is a convex set

16 votes

sum and product of Lipschitz functions

14 votes
Accepted

calculation $f(x)$ from given expression

13 votes

Solving an equation with exponentials

13 votes
Accepted

If $x$ and $y$ are irrational but $x + y$ is rational then $x - y$ is irrational

11 votes
Accepted

$l^p$ space not having inner product

10 votes

Row space and column space for SVD

9 votes

How can I prove the inverse of a function is odd?

8 votes
Accepted

What is the meaning of $e^{int}$ notation

7 votes

demostration of interger part integration.

7 votes
Accepted

Events $A_n\uparrow A$ meaning. $A_n\downarrow A$ meaning.

6 votes
Accepted

How to find the value of this summation equation?

6 votes

How to find the LCM of three numbers?

6 votes
Accepted

$ \frac{1}{2} + \dots + \frac{1}{n} \le \log n $

6 votes
Accepted

Find the remainder when $1!$+$2!$+$3!$....$49!$ is divided by 7?

5 votes
Accepted

Simplifying $\frac{1}{\sqrt{-1}}$

5 votes
Accepted

Show that $P^2$ = $P$

5 votes
Accepted

Prove/disprove $||A^2|| \leq ||A||^2$ for a nxn matrix

5 votes

A Type of Union I do not understand

5 votes
Accepted

Proximal Operator of $ f \left( U \right) = -\log \det \left( U \right) $

5 votes

Proof of an addition theorem

5 votes
Accepted

How to use dominated convergence theorem?

4 votes
Accepted

symbol for maximum number in an array or vector

4 votes

Prove $f$ is continuous iff for every closed set $K$ in $\mathbb R$, the set $f^{-1}(K)$ is closed in $\mathbb R$

4 votes
Accepted

Orthogonal decomposition in Hilbert spaces

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