Uploaded April 2023 | Updated September 2026, 2 weeks ago
Subscribe to Stand-up Maths for more tax tips this useful or less.
Yet to be sponsored by Hubbard's Foodstore Spaghetti Rings in Tomato Sauce. Click here for 0% off your order! sainsburys.co.uk/gol-ui/product/sainsburys-baked-beans-in-tomato-sauce--basics-420g
National Insurance rates and categories (by Hey Mate, Right Cash) gov.uk/national-insurance-rates-letters
Huge thanks to my Patreon supporters. You're all tariffic. patreon.com/standupmaths
CORRECTIONS
- At 05:56 I say “standard leap year” when I mean “standard year”. Sorry! First noticed and reported by Blueboy5678 and Hari Krishnan.
- User “Go Away” corrected a typo in the above correction.
- Let me know if you spot anything else!
Filming and editing by Alex Genn-Bash
Graphics by William Marler
Written, performed and embezzled by Matt Parker
Produced by Nicole Jacobus
Music by Howard Carter
Design by Simon Wright and Adam Robinson
MATT PARKER: Stand-up Mathematician
Website: standupmaths.com
US book: penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker
UK book: mathsgear.co.uk/collections/books/products/humble-pi-signed-paperback
Subscribe to Stand-up Maths for more tax tips this useful or less.
Yet to be sponsored by Hubbard's Foodstore Spaghetti Rings in Tomato Sauce. Click here for 0% off your order! sainsburys.co.uk/gol-ui/product/sainsburys-baked-beans-in-tomato-sauce--basics-420g
National Insurance rates and categories (by Hey Mate, Right Cash) gov.uk/national-insurance-rates-letters
Huge thanks to my Patreon supporters. You're all tariffic. patreon.com/standupmaths
CORRECTIONS
- At 05:56 I say “standard leap year” when I mean “standard year”. Sorry! First noticed and reported by Blueboy5678 and Hari Krishnan.
- User “Go Away” corrected a typo in the above correction.
- Let me know if you spot anything else!
Filming and editing by Alex Genn-Bash
Graphics by William Marler
Written, performed and embezzled by Matt Parker
Produced by Nicole Jacobus
Music by Howard Carter
Design by Simon Wright and Adam Robinson
MATT PARKER: Stand-up Mathematician
Website: standupmaths.com
US book: penguinrandomhouse.com/books/610964/humble-pi-by-matt-parker
UK book: mathsgear.co.uk/collections/books/products/humble-pi-signed-paperback
![General Relativity: Top 05 Mishaps [inc INTERSTELLAR]](https://i.ytimg.com/vi/Z4oy6mnkyW4/mqdefault.jpg "General Relativity: Top 05 Mishaps [inc INTERSTELLAR]
Check out A Podcast of Unnecessary Detail: https://festivalofthespokennerd.com/podcast/
This is the Maths Inspiration show Im going with Eugénie on 24 November: http://www.mathsinspiration.com/events/?id=123
We have passes for schools as well as for people watching from home.
Huge thanks to Eugénie von Tunzelmann for being my coolest friend and for taking the time to chat with me for this video. Check out all the films she has worked on!
https://www.imdb.com/name/nm1590981/
Gravitational Lensing by Spinning Black Holes in Astrophysics, and in the Movie Interstellar
https://arxiv.org/abs/1502.03808
Read the free book Reflections on Relativity by Kevin Brown
https://www.mathpages.com/rr/rrtoc.htm
This is an archive of their old post about the time dilatiopause. Complete with retro ASCII equations.
https://groups.google.com/forum/?hl=en#!original/sci.physics/2VrFGgiVPi8/F4KK_9MWrlMJ
Thanks to Cleon Teunissen for emailing in with a bunch of useful details. http://www.cleonis.nl/
And they recommend this book chapter for more on why the shape of the Earth is an isochrone: http://geosci.uchicago.edu/~kite/doc/Geodynamics_Turcotte_Schubert_part_of_ch_5.pdf
Speed dilation equation:
http://hyperphysics.phy-astr.gsu.edu/hbase/Relativ/tdil.html#c2
Gravity dilation equation:
http://hyperphysics.phy-astr.gsu.edu/hbase/Relativ/gratim.html#c4
CORRECTIONS:
- Yes, the diagram of the photon clock on the train has a light path of over 45° from the vertical which means the train is going faster than the speed of light. Let’s just agree the train (and everything within it) is not to scale!
- Let me know if you spot any more mistakes!
Thanks to my Patreons who mean I can film hours of myself talking about relativity and then ask Alex to edit that into something which makes sense. Here is a random subset of those fine Patreon People:
Markus Herrmann
Chris Connett
Elaine Hewitson
Neil McGovern
Paul LeVan
Claire Greenhalgh
Erin Eldridge
Loren Thomas
Patrick Stover
Glenn Watson
https://www.patreon.com/standupmaths
As always: thanks to Jane Street who support my channel. Theyre amazing.
https://www.janestreet.com/
Filming and editing by Alex Genn-Bash
Animations by William Marler
Music by Howard Carter
Design by Simon Wright and Adam Robinson
Clips from Interstellar (2014) are all copyright some combination of Paramount Pictures and Warner Bros. and I thought we could all agree my use here is pretty fair. But they have already put a copyright claim in on this video, so theres that.
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")
