优美树猜想是一个历史悠久的猜想.1979年,Bermond猜想每一棵对虾树都是优美的.讨论了一类A(i)一系列对虾树的优美性和奇优美性,并给出相应结论.
:The graceful trees conjecture is a longstanding conjecture. Bermond conjectured that every lobster is graceful in 1979. The gracefulness and odd gracefulness about a class of A ( i )-series lobsters are discussed and relevant conclusion is given.