It could be scan of reflected under reverse A=: 1 : 'u~/\&.|.' +A i.6 15 15 14 12 9 5 (0+15),(1+14),(2+12),(3+9),(4+5),5 15 15 14 12 9 5
-A i.6 _15 _13 _10 _6 _1 5 (0-15),(1-14),(2-12),(3-9),(4-5),5 _15 _13 _10 _6 _1 5 ----- Original Message ---- From: Brian Schott <[EMAIL PROTECTED]> To: Programming forum <[email protected]> Sent: Thursday, June 15, 2006 2:20:04 PM Subject: Re: [Jprogramming] Programming puzzle Henry, I am not sure I understand but ... Your pattern dUc cUb bUa aUx where x is an identity element or a zero element, I am not sure of the terminology, looks like a simple pattern handled by infix concept 2 U/\ ] applied to the reverse of the list and then the result reversed. But surely this is to simple. (B=) On Thu, 15 Jun 2006, Henry Rich wrote: + I have a list that ends ... d c b a . + + I want to create a new list that ends + + ... + d' = d U (c U (b U a) U a) U (b U a) U a = d U c' + c' = c U (b U a) U a = c U b' + b' = (b U a) = b U a' + a' = a + + where U is some verb. + + It seems that there should be some form of / \. etc. that + produces this, but I can't find it. Help! + + Henry Rich + + ---------------------------------------------------------------------- + For information about J forums see http://www.jsoftware.com/forums.htm + (B=) <----------my "sig" Brian Schott Atlanta, GA, USA schott DOT bee are eye eh en AT gee em ae eye el DOT com http://schott.selfip.net/~brian/ ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
