Submission timeline
2007–2026One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.
First comments on top threads
HN comment orderThere's a sort of magic trick involving doing perfect riffle shuffles where the whole deck retains it's order. If my memory is correct if you perform 8 perfect riffle shuffles (split deck 50/50, riffle one for one card correctly) then the order resets itself after 8 shuffles. It's usually only performed as a demonstration of skill by experienced card magicians than as a standalone trick.
Pretty funny that this cites a 2015 Numberphile video, considering that my paper with Persi Diaconis was published in 1992. (You know you're on to something when so many people misquote and misinterpret your result, and say it sucks!) Of the many formulations of Gilbert-Shannon-Reeds, an easy one to generalize is running the shuffle in reverse. One could flip a fair coin for each card, to decide if it flies up to the right or left hand. Equivalently, let heads…
The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.
- Breakout years
- 2
- Total points
- 245
- Total comments
- 88
100+ points or 50+ comments
reference only — not used in Hall rules or ranking
reference only — not used in Hall rules or ranking
Every submission
| Date | Title as submitted | By | Points | Comments |
|---|---|---|---|---|
| 2020-08-06 | The Math of Card Shuffling (2018)First breakout · Best thread | benibraz | 137 | 61 |
| 2024-03-03 | The Math of Card Shuffling | aaraujo002 | 1 | 0 |
| 2024-07-03 | The Math of Card ShufflingLatest 20+ point return | Anon84 | 107 | 27 |