Auwvax.357 net.lang.apl utzoo!decvax!harpo!uwvax!greg Thu May 6 10:23:22 1982 a problem and a solution In a corner of an APL News special edition for the APL81 Conference, Jeff Shallit gives the following problems: find two expressions, each six characters or less, the first producing the vector 0 0 1 0 1, and the second producing 0 1 0 0 1. I am only able to come up with solutions that work in origin zero. Can anyone come up with solutions that work in origin 1, or better, solutions that are origin-independent? - Greg Johnson U Wis - Madison By the way, the solution I had in mind for the problem of sorting the rows of a matrix into lexicographic order involves decoding each row into a scalar quantity, sorting those scalars, and then re-expanding into a matrix. This solution assumes an arbitrary-precision machine, since for any large number L, a matrix containing the row 1, ( ceiling 2 log L ) rho 0 when decoded will require that the machine be able to represent a number larger than L. ----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen of http://communication.ucsd.edu/A-News/ This Usenet Oldnews Archive article may be copied and distributed freely, provided: 1. There is no money collected for the text(s) of the articles. 2. The following notice remains appended to each copy: The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.