Experiments, Group, Milestones, Murderous Maths, Physics, Together with sis, Trips

All Nerds Unite: Simon meets Steve Mould and Matt Parker in London

Hilarious, inspirational and loaded with cosmic coincidences, this was one of the best evenings ever! Many of our currently favourite themes were mentioned in the show (such as the controversy of Francis Galton, the BED/ Banana Equivalent Dose, sound wave visualizations, laser, drawing and playing with ellipses, Euler’s formula). Plus Simon got to meet his teachers from several favourite educational YouTube channels, Numberphile, StandUpMaths and Steve Mould.

With Steve Mould
With Matt Parker
art, Coding, Geometry Joys, Murderous Maths, Museum Time, Notes on everyday life, Together with sis, Trips

Back at Stedelijk

As for Morellet’s RGB colored cells, very inspiring for a sandpiles coding project. (The photographs don’t convey half of the effect the original canvasses invoke. Morellet’s cells actually appear to be moving when you gaze at the original).
Installation by Barbara Kruger
Installation by Barbara Kruger
Read this poem from top to bottom and it’s depressing, from bottom to top and it’s empowering.
Contributing, Milestones, Murderous Maths, Museum Time, Physics, Trips

The Brachistochrone

Simon believes that he has found a mistake in one of the installations at the Technopolis science museum. Or at least that the background description of the exhibit lacks a crucial piece of info. The exhibit that allows to simultaneously roll three equal-weight balls down three differently shaped tracks, with the start and the end at identical height in all the three tracks, supposes that the ball in the steepest track reaches the end the quickest. The explanation on the exhibit says that it is because that ball accelerates the most. Simon has noticed, however, that the middle track highly resembles a cycloid and says a cycloid is known to be the fastest descent, also called the Brachistochrone Curve in mathematics and physics.

In Simon’s own words:

You need the track to be steep, because then it will accelerate more – that’s right. But it also has to be quite a short track, otherwise it takes long to get from A to B – which is not in the explanation. It’s not the steepest track, it’s the balance between the shortest track and the steepest track.

Galileo Galilei thought that it is the arc of a circle. But then, Johan Bernoulli took over, and proved that the cycloid is the fastest.

The (only) most elegant proof I’ve seen so far is in this 3Blue1Brown video: https://www.youtube.com/watch?v=Cld0p3a43fU

There’s also a VSauce1 video, where they made a mechanical version of this (like Technopolis): https://www.youtube.com/watch?v=skvnj67YGmw

Wikipedia Page: https://en.wikipedia.org/wiki/Brachistochrone_curve

We’ve also made some slow motion footage of us using the exhibit (you can see that the cycloid is slightly faster, but as far as I can tell, it’s not precision-made, so it wasn’t the fastest track every time): https://www.youtube.com/watch?v=5Brub0FnpmQ

I hope that you could mention the brachistochrone/ cycloid in your exhibit explanation. I don’t think you can include the proof, because for such a general audience, it can’t fit on a single postcard!

Exercise, Experiments, Notes on everyday life, Physics, Simon teaching, Together with sis, Trips

A lot of fluid dynamics at Technopolis

Today we celebrated my 40th birthday with a family trip to Technopolis, a mekka for science-minded kids in the Belgian town of Mechelen. (Technically, my real birthday is in two days from now, but I have messed with the arrow of time a little, to speed things up).
The entrance to the museum is adorned with a red lever that anyone can use to lift up a car!
Simon and Neva lifting up the car
The beautiful marble run and math and physics demo in one
Galton’s board and Gaussian distribution
Simon explaining the general relativity demo, which is part of the marble run
This was probably the winner among all the exhibits: a wall to climb with a mission (Simon figured it out rather quickly – one had to turn “mirrors” to change the direction of light (green projection) and have the light rays extinguish the targets.
Simon tried to explain this to other children, but they only seemed to want to climb. It was sad to see how no one cared to listen (well, except for Neva of course).
Simon was already familiar with this optical illusion. Later he saw another version of this on an Antwerp facade.
The logic gates were too easy.
the center of gravity
Huge catenaroids! Something Simon had already demonstrated to us at home, but now in XXL!
And huge vortices! Another passion.
Hydrodynamic levitation! Hydrodynamic levitation!
Look! A standing wave!
And another standing wave!

Here Simon explains one more effect he has played with at home, the Magnus effect.

Exercise, Math Riddles, Murderous Maths, Notes on everyday life, Simon teaching, Simon's sketch book, Together with sis, Trips

Math on the Beach

Sunday at the beach, Simon was reenacting the 5 doors and a cat puzzle (he had learned this puzzle from the Mind Your Decisions channel). The puzzle is about guessing behind which door the cat is hiding in as few guesses as possible, while the cat is allowed to move one door further after every wrong guess.

the little houses served as “doors”, and Simon’s little sister Neva as “the cat”

“Here’s a fun fact!” Simon said all of a sudden. “If you add up all the grains of sand on all the beaches all over the world, you are going to get several quintillion sand grains or several times 10^18!” He then proceeded to try to calculate how many sand grains there might be at the beach around us…

In the evening, while having a meal by the sea, Simon challenged Dad with a Brilliant.org problem he particularly liked:

Simon’s explanation sheet (The general formulas are written by Simon, the numbers underneath the table are his Dad’s, who just couldn’t believe Simon’s counterintuitive solution at first and wanted check the concrete sums. He later accepted his defeat):

Discovering Antwerpen, Group, history, Museum Time, Together with sis, Trips

Red Star Line Museum

An amazing visit to the Red Star Line Museum this weekend! It’s a museum telling the moving story of the exodus from Europe at the turn of the 20th century. Red Star Line was a private passenger liner company that brought over 2 million Europeans to America. Simon enjoyed following the story of a 9 year old girl Basia Cohen who fled the violence and hunger in Ukraine in 1919 (well, maybe it was not the story that actually triggered his interest but the exciting quest involving looking for a suitcase in every hall of the museum and completing the tasks hidden inside the suitcase).

Simon and Neva posing for an extended family picture together with their cousins, in the style of the early 20th century family photographs
Simon reading Basic Cohen’s story out loud
Albert Einstein’s diary written aboard the Red Star Line ship
Albert Einstein’s letter of resignation written on Red Star Line stationary
Simon and Neva undergoing a pretend medical examination (eye test), just like the passengers of the Red Star Line
Another suitcase
Upon arrival in New York’s Ellis Island, the newcomers were obliged to do an intelligence test (a puzzle with wooden blocks). Simon has managed to complete the task, so he would have been accepted to enter America!
Simon listing a reason for why he’d like to immigrate to America. He was first reluctant to take part in this pretend play as he was afraid it would somehow turn into reality. This is a funny side of him, taking things too literally sometimes.
Coding, Coding Everywhere, Community Projects, Contributing, Crafty, Geometry Joys, Group, Java, Milestones, Murderous Maths, Notes on everyday life, Simon teaching, Simon's Own Code, Together with sis, Trips

Simon speaking at the Processing Community Day in Amsterdam

Simon had his first public performance in front of a large audience last Saturday (February 9, 2019): he spoke about his Times Tables Visualization project at the Processing Community Day in Amsterdam!

Simon speaking at Processing Community Day Amsterdam

Simon writes: You can access the code of the poster and the animation (and the logo for my upcoming company!) and download the presentation in PowerPoint, on GitHub at https://github.com/simon-tiger/times_tables

If you’d like to buy a printed copy of the poster, please contact me and I’ll send you one. Status: 3 LEFT.

One of the tweets about Simon’s presentation
Simon next to his poster after the presentation
Working on his presentation the day before
Waiting to speak
Experimenting with other projects at the community day
At the entrance to the venue, with the poster still packed
There was a lot of interest in Simon’s project
Coding, Group, Milestones, Murderous Maths, Trips

Processing Community Day Amsterdam has published its program and Simon is in it!

It’s official! Simon is going to be speaking at this event, his presentation (about his Times Tables Visualization project in Processing) is planned for the 15-o’clock block!  

Times Tables with Simon Tiger
Simon is a 9 year old mathematician who loves to reveal the mysterious beauty of math. In his short presentation he will share a recent project he made: visualising times tables from 1 to 200 in Processing. Simon first created an animated version and later turned it into a ginormous poster with 200 static representations of the times tables, both mathematically accurate and artistic. Simon will bring several copies of the poster! 

Check simontiger.com for more information and here’s a link to the animated version. 


The day is packed with other beautiful talkes and workshops!

DAY: Saturday 9 February 2019
TIME: 11.00 – 24.00
WHERE: FIBER Office | Open Coop 
Tolhuisweg 2, Amsterdam 
How to get there: Take the ferry from Amsterdam CS to the Buiksloterweg (Amsterdam North). Our location is a 5-minute walk. The ferry services continue all day and all night.