a proof box. like a mail box in shape, but you put proofs you write. you typeset it in tex, print it, properly fold it and put in there.
people will put their proofs collectively, read others'.
the proof box will be set up in an appropriate place in the university's mathematics department buildings.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko