# New post in Examples-counterexamples

## Examples of continuous functions $f:(0,1)\to[0,1]$

October 15th, 2020

## Can you explain us a simple example, for a mathematical function, of Kramersâ€“Kronig relations?

February 8th, 2020

May 30th, 2020

August 1st, 2022

## Prove by minimum counterexample that $2^n>10n$ for $n>5$

November 20th, 2020

August 1st, 2022

## How to convert a problem to a stars and bars problem?

August 29th, 2020

March 25th, 2020

March 15th, 2020

August 1st, 2022

## Example of a white noise series that is not a martingale difference series with respect to its natural filtration

October 6th, 2020

## Show that $f(x) = \log\log(\frac{e}{\Vert x \Vert_{2}})$ is in Sobolev space $W^{1,p}(B_1(0))$

December 31st, 2020

August 1st, 2022

August 1st, 2022

August 1st, 2022

August 1st, 2022

## counter-examples in measure theory and set topology

September 2nd, 2020

August 1st, 2022

June 25th, 2020

August 1st, 2022

July 28th, 2020

April 19th, 2020

## Propositional logic vs predicate logic: examples?

February 25th, 2020

August 1st, 2022

## how to solve a third degree equation of complex roots and coefficients

September 13th, 2020

## Prove using the smallest counterexample technique that: $\binom {2n}n\leqslant4^n.$

November 8th, 2020

## Sequence in $l^p$ but not $l^q$ for all $q<p$

January 18th, 2020

## Does every inner product space have an orthonormal basis?

December 30th, 2020

August 1st, 2022

June 29th, 2020