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There's a nice collection on Math Overflow: Not especially famous, long-open problems which anyone can understand http://mathoverflow.net/q/100265/8217 http://
by robinhouston 11y ago
There's a nice collection on Math Overflow: Not especially famous, long-open problems which anyone can understand
http://mathoverflow.net/q/100265/8217 http://mathoverflow.net/q/100265/8217