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52-shuffle live stream 28 April 2021 (Patreon)

Published:
2021-04-22 19:46:56
Edited:
2021-04-22 22:32:00
Imported:
2026-06

Content

I may have over-promised this time, but in my latest video I have said I would do 52 perfect riffle shuffles during a Patreon live stream.

How is 5pm UK time for everyone? (That's GMT+1 = 9am on the USA West coast and 12pm on the East.) Wednesday 28 April 2021.

The live stream will be here: https://youtu.be/mx5vJkRI9VY

If you cannot make it live, you can ask questions in the comments on this Patreon post and I'll answer them as best I can!

PS The original upload of this video had garbled audio, so this one is a re-upload. Sorry about that!

Files

The impossible odds of a Perfect Bridge Deal.

Signup for your FREE trial to The Great Courses Plus here: http://ow.ly/I5fV30rDCPO This was my previous video about Dream and Minecraft. "How lucky is too lucky?: The Minecraft Speedrunning Dream Controversy Explained" https://www.youtube.com/watch?v=8Ko3TdPy0TU Yep, I'm going to do 52 perfect shuffles in a row, live. This is the Patreon post with details: https://youtu.be/mx5vJkRI9VY Or wait and see it for free on the second channel: https://youtube.com/mattparker2 Check out Tori Noquez's great videos. "The Mathematics of 8 Perfect Faro Shuffles" https://www.youtube.com/watch?v=MtBzp_-h0oQ This is Peter Rowlett's Aperiodical article "Four perfect hands: An event never seen before (right?)" https://aperiodical.com/2011/12/four-perfect-hands-an-event-never-seen-before-right/ Plus Jason Davison did a Numberphile about perfect shuffles and magic. https://www.youtube.com/watch?v=Y2lXsxmBx7E This is how I actually did the calculation. https://www.wolframalpha.com/input/?i=%2812%21%5E4+39+26+13%29%2F51%21 CORRECTIONS - The first upload of this video had some serious audio issues. Sorry! It broke when the video was render and because it was only in the middle I didn't spot it once it had uploaded. - Let me know if you spot any mistakes in this version! Thanks to my Patreon supporters who I used to justify spending several weeks learning how to do a faro shuffle. I'm meant to be writing a new book you know. So, thanks a lot. https://www.patreon.com/standupmaths Filming by Matt Parker Editing by Alex Genn-Bash Graphics by Sam Hartburn and Matt Parker Music by Howard Carter Design by Simon Wright and Adam Robinson MATT PARKER: Stand-up Mathematician Website: http://standupmaths.com/ US book: https://www.penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker/ UK book: https://mathsgear.co.uk/collections/books/products/humble-pi-signed-paperback

Comments

Brian Ware

A faro shuffle. Color me impressed. Easier to get a one to one shuffle, but still not easy. Next time, one-handed faro shuffles!

Thecommexokid

The audio of the “deal deal” video goes totally crazy starting at ~2:50, as corroborated by many of the commenters on the YouTube page

Rick Rubenstein

A friend of mine used to practice his faro shuffle during his grad school lectures, except during one where he didn't want the professor to see him. That professor being Persi Diaconis.

Matt Parker

Urgh, yes, that somehow happened in the final export of the video. We're re-rending now and a new upload will be imminent. Sorry!

Matt Parker

That's amazing. Yeah, Persi literally wrote the book on this stuff. I'd not want to shuffle in front of them either!

Balázs Jókay

The audio fixes at 6:25, so for who cannot wait until the reupload, like me :), only need to bear until that point, around 4 minutes of suffering and then just go, enjoy the content again :)! Very interesting video again, thx Matt!

Stephen Benner

Matt developed a stutter and he’s blaming it on the tech.

Keith Moser

Assuming you'll calculate ahead of time & have written somewhere off-screen what card is the 26th from the top for all 52 iterations, right? You have a pretty decent technique down (I've never tried a faro shuffle—I always thought they were pretty difficult) so the 26/26 split is probably the most difficult part. I'd estimate 10-15s per shuffle, so 52 iterations will make the video 9-13 minutes long (which is not as long as I thought the video would be when I first saw you were doing it)...

Chris Rogers

Thought you were building up to a Matt Parker's Maths Puzzle at the end 😁

Bruce Garner

Matt was doing his shuffles in 30s while talking so it's going to be around 26 minutes ... although after 52 shuffles he'll either be getting quicker from the repetition or slower because he's tired. 😁

Toby Archer

Matt, I don't think I can make the stream as it's at an awkward time in Perth.. but what do you say to the argument that all kinds of extremely improbable things happen every day but we don't note them because they are not 'winning' combinations. Any other bridge deal is just as improbable under certain parameters, so why rule out this particular one? Having said that, the frequency of reports of a perfect deal is _probably_ way too high to be down to pure chance.

Uri Rothschild

april 28 at 5pm works fine for me. given that i'm not in the hospital since my wife is due around that time. but what are the odds of here giving birth exactly then... hey, i can actually work that out...

Keith Moser

9:30-9:45 is a talking faro shuffle without the riffle and a little showboating for the camera... I bet Matt can do it in under 15 mins!

Thomas N Wyndham

April 29 at 02:00 for Brisbane. Guess I'll catch up later. Preload some questions then, what's the best type of public transport, and why do you think things on rails are often so much sexier than things on tyres?

Matt Parker

Somewhere between a whim and watching the viewing figures. I know this video took a hit with the re-upload (that tends to break The Algorithm) but it seemed to be underperforming in terms of views. And I put a lot of effort into learning a perfect faro shuffle! So I thought maybe the title/thumbnail were not accurately conveying what the video was about. I'll chat more about it in the live shuffle video.

Matt Parker

These are the questions I was waiting for.

Thomas N Wyndham

I actually do have a cracking question about buses I would love to pick your brains on one day, but want to get more information about it first. The buses we have, typically route numbers are two or three digits, but, I found accidentally one day you can put in longer numbers on the desto. Further playing around I found that you can put in up to nine digits, and it will show the whole number. If you put in ten digits, it breaks somehow, but will still display something. If you put in ten 9s (the easiest number to insert as it needs the fewest keypresses), it displays 1410065407 instead of 999999999. Different ten digit numbers break in different ways. I would love to try and see if there's a pattern some day, trying and recording different numbers in and out, and dare say you might be able to see a pattern that I don't.

Paul Nord

It's a great analogy for NMR spin echo. If you align the spins of molecules with a magnetic field it... Nevermind, it starts ordered, you do a thing and create disorder. When you hit them with a pulse some time later it produces, after a little more time, a realignment of the spins - an echo. Even though they seem to be random and pointing in every direction, the spins are still correlated because they were correlated not too long ago.

Simon Allen

sadly I do not see much happening in the live stream. Looks like connection issues.

Simon Allen

Now it is working for me. Seems a local problem.

UsrBinPRL

When growing up and playing whist with the grandparents I was taught to deal a new hand 4-3-3-3, 3-4-3-3, 3-3-4-3, 3-3-3-4 rather than 1-1-1-1 thirteen times. It always struck me as strange as it made the chance of being single suited much higher given that the cards were not shuffled between hands. My grandfather was not adverse to cheating so this may explain things.

John Sawyer

I think he just played too much 500 rather than bridge. :(