[Haskell-cafe] Confused about Cyclic struture

Hi, Im a newbie to Haskell and the concept of "cyclic strutures" has confused me a lot For example (taken from Richard Bird's book): ones = 1:ones Its clear that it involves a cyclic structure But: ones = repeat 1 repeat x = x:repeat x I dont really understand what the differences between these two and why the latter does not have a cyclic structure ? Why does changing : repeat x = xs where xs = x:xs create a cyclic stucture ? Thank you Anh _________________________________________________________________ Winks & nudges are here - download MSN Messenger 7.0 today! http://messenger.msn.co.uk