« first day (4542 days earlier)      last day (114 days later) » 

Arctic Char
Arctic Char
3:25 AM
C
 
7 hours later…
Feeds
Feeds
10:37 AM
2
Q: The $27$ dots problem

Marco RipàHere is a generalization of the well-known Nine dots puzzle to $3$ dimensions, where we introduce a new constraint (it is just a particular case of a more general problem that I have recently shared on MO, so let us name it the 27 dots problem). 27 dots problem: Let the $27$ points $\{0,1,2\} \ti...

combinatorics graph-theory optimization euclidean-geometry open-problem
 
4 hours later…
Xander Henderson
Xander Henderson
2:56 PM
del-pls 20k+ elementary-set-theory Doesn't even try to answer the question which was asked. Answer to: Why do the rationals, integers and naturals all have the same cardinality?‭ - Anixx‭ 2024-06-19 14:46:33Z
I deleted the above, as it is a near-identical duplicate of math.stackexchange.com/a/4934808 .
This, also, is basically the same answer. math.stackexchange.com/a/4933654
 
4 hours later…
Bill Dubuque
Bill Dubuque
7:14 PM
D newbie VLQ, dupe of prior answer

« first day (4542 days earlier)      last day (114 days later) »