It is apparent from the tacit structure of C that it can be simplified as: c0=. 1 , 1 + [: +/\ 4 # 2 + 2 * i.
1++/c0 500 669171002 As Dan has pointed out a few times before, one can just do symbolic manipulations disregarding the meaning of the verb involved. On Tue, Mar 26, 2013 at 9:46 PM, Linda Alvord <[email protected]>wrote: > Also, > > 1++/C 500 > 669171002 > > Linda > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Linda > Alvord > Sent: Tuesday, March 26, 2013 5:58 PM > To: [email protected] > Subject: Re: [Jprogramming] Lucky spiral > > This really belongs with Lucky Spiral. > > C=: 13 :'1,1++/\4#>:1++2*i.y' > C 6 > 1 3 5 7 9 13 17 21 25 31 37 43 49 57 65 73 81 91 101 111 121 133 145 157 > 169 > D1 C 6 > 741 > D2 C 6 > 825 > (D1 + D2) C 6 > 1566 > (D1 + D2) C 500 > 669171002 > > C 6 is the corners of 6 squares around 1 > > D1 and D2 are the diagonals > > Linda > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Zsbán > Ambrus > Sent: Monday, March 25, 2013 12:46 PM > To: [email protected] > Subject: Re: [Jprogramming] Lucky spiral > > On Thu, Mar 21, 2013 at 9:24 PM, David Ward Lambert < > [email protected]> > wrote: > > cw=:|:@:|. NB. clockwise matrix rotation assert (> 3 0 ; 4 1 ; 5 2) -: > > cw i. 2 3 > > > > spiral =: (, (>:@:(*/) + i.@:}.)@:$)@:cw assert (> 5 4 3 ; 6 1 2 ; 7 8 > > 9) -: (spiral^:4)1 1$1 > > Ah, look! That looks like a new solution to the spiral problem we've > dicussed on this mailing list a while ago. See the old thread near > > http://www.jsoftware.com/pipermail/programming/2007-December/009009.html > > Ambrus > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
