# User Portlet

Sander Huisman
Discussions
![enter image description here][1] &[Wolfram Notebook][2] [1]: https://community.wolfram.com//c/portal/getImageAttachment?filename=bouncing_rays_hero.gif&userId=20103 [2]:...
![enter image description here][1] I was solving the Rosetta problem [Peaceful chess queen armies][2] just now. The idea is to place q armies of queens, each m large, on a n-by-n chess board such that one army of queen can not capture any other...
Probably most of you heard the sad news that there was a giant explosion in the port of Beirut today August 3rd 2020. Several videos were released on which we can do analysis. Note that the method I will use was also famously used by G.I. Taylor to...
![enter image description here][1] Factorio is a game where you crashed on a planet with your space-craft. You have to built a new rocket and leave this planet again. In order to do so you will need to mine metals and built yourself a factory,...
This is part of a series where I explore some of the videos of Numberphile, see also the other ones: - [[Numberphile] - The Illumination Problem][1] - [[Numberphile] - Frog Jumping - Solving the puzzle][2] - [[Numberphile] - Sandpiles - Done...
This is part of a series where I explore some of the videos of Numberphile, see also the other ones: - [[Numberphile] - The Illumination Problem][1] - [[Numberphile] - Frog Jumping - Solving the puzzle][2] - [[Numberphile] - Sandpiles - Done...
*NOTE: click on the image to zoom-in; click browser back button to return to reading.* ---------- [![enter image description here][10]][10] This is part of a series where I explore some of the videos of Numberphile, see also the other...
Using a list ------------ Let's consider the working example: ClearAll[GetPrimes2] GetPrimes2[n_Integer] := Module[{pos}, pos = FirstPosition[vals[[All, 1]], \$KernelID][[1]]; vals[[pos, 2]] += 1; FactorInteger[n] ...
A common function to 'unwrap' a list of data which has had a modulus operation working on it is still absent from the Wolfram Language. This also quite commonly happens when you measure something in the lab which is for example an angle that jumps...
As part of my Numberphile series of posts: - [$Numberphile$ - Frog Jumping - Solving the puzzle][1] - [$Numberphile$ - The Illumination Problem][2] - [$Numberphile$ - Sandpiles - Done in the Wolfram Language][3] here is another one...