标题误导

来源: 于 2010-09-15 05:23:19 [旧帖] [给我悄悄话] 本文已被阅读：次

Taking 3-D for granted to solve an unsolvable 2-D puzzle…? This is like allowing line crossing in the original 2D puzzle… it is very difficult NOT finding a solution in 3D for any given number of node sets......