May
10
revised Shortest paths when randomly scrambling a Rubik's cube
edit about partial answer
May
9
revised Scrambling a Rubik's cube by an adversarial noob
added 255 characters in body
May
2
revised Restricted version of the Clique problem?
fixed k clique naming
May
2
revised Irregularity of $\{a^ib^jc^k \mid \text{if } i=1 \text{ then } j=k \}$
modified to include generalized pumping lemma
May
2
revised Restricted version of the Clique problem?
fixed wording, typo
May
1
revised Restricted version of the Clique problem?
added 582 characters in body
May
1
revised Restricted version of the Clique problem?
added 171 characters in body
May
1
revised Restricted version of the Clique problem?
added 171 characters in body
Apr
30
revised operations that aren't closed for undecidable languages
added "closure" specification to the title