Xerrada "Ciència, màgia i misteris del Cub de Rubik", CMU R Llull BCN, 6/11/2017

1. CMU Ramon Llull, Barcelona, 6/11/2017
Miquel Duran
Càtedra de Cultura Científica i Comunicació Digital
miquel.duran@udg.edu
Universitat de Girona
@miquelduran #rubsci #magsci @magsci @c4dudg
Ciència, màgia i misteris
del Cub de Rubik

2. 40 anys del Cub de Rubik: google doodle
• https://www.google.com/doodles/rubiks-cube
• App del Cub de Rubik a Google
• https://www.imagecu.be/
• https://www.chrome.com/cubelab

3. Scientific American, 1981
SciAm 1981: cub rubik
https://wearethemutants.com/2017/01/17/scientific
-american-featuring-rubiks-cube-1981/
•

6. Rècords del món... 4,69 segons !
https://boingboing.net/2017/09/06/teen-solves-rubiks-cube-in-w.html/amp

7. El Cub de Rubik més gran del món
A l’MIT
https://boingboing.net/2017/04/19/worlds-largest-rubiks-cube.html

8. Robot que fa Cub de Rubik (Raspberry Pi)
A Raspberry Pi-powered Rubik’s cube-solving robot
https://boingboing.net/2017/09/14/a-raspberry-pi-powered-rubik.html

9. Robot, Cub de Rubik... < 1s
https://boingboing.net/2016/11/11/watch-a-robot-solve-a-rubiks-c.html

10. RT @pickover: What kind of alien mind could
dream of solving a 1000x1000x1000 Rubik's
Cube? YouTube: http://bit.ly/1mNCUHB
Cub de Rubik 1000 x 1000 ! (simulat!)

11. En 20 moviments...
QUO: CIENCIA DEL CUBO RUBIK
http://www.quo.es/ciencia/ciencia-del-cubo-rubik

13. Commutadors i conjugats
= Mecànica quàntica: operadors
Exemples: sexy move S= R U R’ U’, S6 = I
Exemples: Permutació cíclica 3 arestes
R2 U R U R’ U’ R’ U’ R’ U R’
R i L commuten! R L = L R
https://ruwix.com/the-rubiks-cube/commutators-conjugates/

14. Resolució algorítmica – per fases
• Si vols anar ben lluny,
ves-hi xino-xano
• Teoria de grups: per
als matemàtics i
científics
https://edunoming.wordpress.com/2016/11/01/resolucio-algoritmica-del-cub-de-
rubik-les-fases-de-la-seva-resolucio/

15. L’abecedari i el Cub de Rubik
Per resoldre’l amb els ulls clucs:
https://ruwix.com/the-rubiks-cube/how-to-solve-the-rubiks-cube-blindfolded-tutorial/
Atenció: en un jocs de cartes de pòker hi caben 2 alfabets... I en un any de 364 dies, 14

16. Cub de Rubik en 4 dimensions!
(recordem en Dalí!)
http://superliminal.com/cube/cube.htm

17. Qbe: Quark Matter on Rubik's Cube
https://arxiv.org/abs/1702.06217v1

18. Criptografia... Quàntica... Rubik
Cubic Quantum Security
Quantum cryptography provides us new methods of
securing the communications. As compared to classical
cryptography, which implies different mathematical
algorithms to secure the information, quantum
cryptography focuses on the physical support of the
information. The process of information transmission or
stocking is realized by the intermediation of a physical
support, for example the photons transmitted by optical
fiber or the electrons from the electricity.
Communication security can be regarded as securing the
physical support of the carrier of the information - in
our case the photons from the optical fiber.
Consequently, how and what an attacker can find out
depends exclusively on the laws of physics. The paper
presents a symmetrical encryption method based on the
method of mixture used by the rubik's cube.
http://ieeexplore.ieee.org/document/6822341

19. Química del i al Cub de Rubik
http://chemsec.org/solving-the-3d-puzzle-game-rubiks-cube-might-not-be-so-smart-after-all/
It turns out it’s probably not as smart as you
thought to play with the cube, except if you
bought yours in Sweden.
The NGO Arnika from Czech Republic tested the
ingredients of Rubik’s cubes and found the two
flame retardants OctaBDE and DecaBDE in
almost every sample they bought on a worldwide
scale.

20. Enantiòmers i diastereòmers
• El Cub de Rubik, igual que un dau, té isòmers que
es reflexen al mirall: enantiòmers
• Igual que un parell de guants, o el L-limonè i el R-limonè
• També hi ha diastereòmers, que tenen les cares
amb una configuració diferent
• Les peces del mig en general no importa quina
orientació tenen... Excepte en els Cubs de Rubik de
fotos

21. Taula periòdica dels elements al Pyraminx
https://www.google.com/patents/US6361324

22. Cub de Rubik amb la TPE
http://www.randelshofer.ch/rubik/virtual_cubes/professor/picture_cubes/5x_periodic_table_cube.html

23. Entropia i Cub de Rubik
5 Life Lessons from the Rubik’s Cube
It is easier to create chaos than to create order.
https://goodmenproject.com/bits-and-pieces/life-lessons-from-the-rubiks-cube-lbkr/

24. Ciència dura: Llocs estranys per a
un Cub de Rubik...
Efect diòxid de carboni sobre peixos: Behavioural
Disturbances in a Temperate Fish Exposed to Sustained
High-CO2 Levels
http://journals.plos.org/plosone/article?id=10.1371/jour
nal.pone.0065825
Són els pops dretans?
https://www.scientificamerican.com/gallery/rubiks-cube-
to-reveal-octopus-handedness/

25. Una mica d’humor...

26. Cub de Rubik 2x2x2... de paper
https://www.youtube.com/watch?v=ySEEguxu_kA

27. Cub 2x2x2... de llana!
2x2x2 Rubik Cube: Meet the mathekniticians - and their amazing woolly
maths creations
https://www.theguardian.com/science/alexs-adventures-in-numberland/2016/oct/03/meet-the-
mathekniticians-and-their-amazing-woolly-maths-creations

28. Cub de Rubik i psicologia
Problem solving:
https://www.youcandothecube.com/blog/puzzling-science-using-the-
rubiks-cube-to-teach-problem-solving

29. Cub de Rubik i el piano
https://www.intmath.com/blog/videos/math-movie-how-to-play-a-rubiks-cube-like-a-piano-10589

30. Rubik's Cube And Salvador Dali Elephants by Victoria Sinkevy
https://fineartamerica.com/featured/rubiks-cube-and-salvador-dali-elephants-victoria-sinkevych.html

31. Cub de Rubik i Escher...
https://twitter.com/i/web/status/817040298471727108

33. Mosaics amb Cubs de Rubik
https://www.youcandothecube.com/mosaics/create-your-own-mosaics

34. Màgia i Cub de Rubik...
• Força atractiva la resolució curiosa proposada per en Matt
Parker: This Trick Makes It Look Like You Can Solve a Rubik’s
Cube
• http://thescienceexplorer.com/technology/trick-makes-it-look-you-
can-solve-rubik-s-cube
• Espectacularitat i relat del que es va presentar al show “Fool
us” de Penn&Teller per Seteven Brundage
• https://www.youtube.com/watch?v=Qph0_pBUEr8
• Programa al #quequicom de dimarts 8/11/2016 sobre el
Cub de Rubik:
• http://www.ccma.cat/tv3/alacarta/quequicom/la-genialitat-del-
cub-de-rubik/video/5630304/
• Got Talent: Raymon
• http://www.telecinco.es/gottalent/Raymon-mago-cubos-
rubik_2_2327880231.html

35. Rubik:
the most characteristic part of the
cube is the contradiction between
simplicity and complexity

36. Teniu poders màgics?

37. Moltes gràcies!
@miquelduran

38. Moltes gràcies a tothom!
http://magsci.eu @magsci #rubsci
http://rubiks.com
http://rubix.cat
https://www.worldcubeassociation.org