I've been looking for a copy of the Kourovka notebook. It's a collection of group theory problems ranging from PhD thesis level to open research problems.
Born February 16, 1965, the first copy was handwritten at the First All-Union Symposium on Group Theory.
The name derives from the Kourovka tourist centre near Sverdlovsk (where the Symposium took place).
However, sadly enough, I cannot find a modern edition of the Kourovka notebook! I would be eternally grateful to anyone that can point me in the right direction to obtaining a copy...
In its place, however, I have stumbled upon a few open source-ish gems:
- Open Problem Garden a collection of open problems (it's a wiki: help it grow!)
- Open Problems In Mathematics And Physics - what appears to be an index of other people's "open questions."
- Wikipedia's Page, good old wikipedia!