> balanced parentheses
> dyck paths
> coin stacks
> noncrossing matchings
> permutations avoiding 231, 132, 312, 213
> noncrossing partitions
> nonnesting matchings
> binary trees
Thanks for your reply -- can you provide a pointer where to find these
classes, this one
> http://sagenb.org/home/pub
Darn, that's a bug in the notebook. Let's see if a less-busy server
is less afflicted.
http://flask.sagenb.org/home/pub/101/
If this fails, I'll attach the worksheet.
On Sun, Mar 25, 2012 at 1:06 PM, Christian Stump
wrote:
>> balanced parentheses
>> dyck paths
>> coin stacks
>> noncrossing m
