標題誤導

來源: 於 2010-09-15 05:23:19 [舊帖] [給我悄悄話] 本文已被閱讀：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......