I'll expand my comment that was haphazardly deleted with the duplicate post.
The definitive site for discussing math is
artofproblemsolving.com
for discussion of contest-style problems.
Some of the other online forums are restricted to persons in particular professional associations; Art of Problem Solving is open to anyone, and well moderated.
The definitive site for discussing math is
artofproblemsolving.com
for discussion of contest-style problems.
Some of the other online forums are restricted to persons in particular professional associations; Art of Problem Solving is open to anyone, and well moderated.