Answer more than 30 days after a question was asked as first answer scoring 2 or more. This badge can be awarded multiple times.
earned this badge 4 times
Closed-forms of real parts of special value dilogarithm identities from inverse tangent integral function
Awarded jan 3 at 21:41
Awarded aug 4 at 19:33
Awarded may 7 '13 at 20:38