Posts tagged with john baez

John Baez:

"There must be hundreds of mathematicians roaming the earth thinking operads are difficult and abstruse, because they’ve seen the definition without any pictures.





These people should be grateful they weren’t taught how to tie their shoes in an equally wrong-headed manner.”

What is an operad?

Why should someone interested in homotopy care about operads?

  • the main way to probe a space is by looking at the maps from circle, sphere, 3-sphere, 4-sphere, onto it.
  • "Most homotopy theorists would gladly sell their souls for the ability to compute the homotopy groups of an arbitrary space”
  • Operads organise the information of the restricted higher homotopies.

(Source: math.ucr.edu)

John Baez and James Dolan, From Finite Sets to Feynman Diagrams

  • an explosion of ideas
  • equality x=x is boring
  • why is 6÷2=3 ?

(Source: arxiv.org)

All right, Φ is straight-up crazy.

  • Φ² = Φ + 1
  •  ⅟Φ = Φ − 1

recursive definition of ¦