On Sun, 10 Aug 2008, Abdulaziz Ghuloum wrote: > > On Aug 10, 2008, at 8:15 PM, Chongkai Zhu wrote: > >> I can't understand why (expt 0 0) should be 1. Would anyone explain? > > Because 1 is the identity of the multiplication operation. > L'hopital is spinning in his grave, but whether its clockwise or counterclockwise is unknown. -elf