Copyright © 2002 by Antti Karttunen

A057501/A057502

Effect:
Rotates non-crossing chord (handshake) arrangements (interpretation e).
[()()()()]
[(()()())]


[()()(())]
[(()(()))]
[()(())()]
[((())())]
[(())()()]
[()(()())]
[((()()))]
[(()())()]


[()((()))]
[(((())))]
[((()))()]
[(())(())]



A057161/A057162

Effect:
Rotates polygon triangulations (interpretation a).
[()()()()]
[(()()())]
[(()())()]
[(())(())]
[()((()))]
[(((())))]


[()()(())]
[(()(()))]
[((()))()]


[()(())()]
[((())())]


[()(()())]
[((()()))]
[(())()()]