The following expresses the tautology that ((x^2)-y^2) = (x+y)*(x-y) : diffsq=: -&*: = + * - x=: 0.001 * _1e9 + 10 ?...@$ 2e9 y=: 0.001 * _1e9 + 10 ?...@$ 2e9 x diffsq y 1 1 1 1 1 1 1 1 1 1
Your question brings to mind events in the early days of J. For a time Ken wondered, are there many examples of fork? After a while, it seemed that _everything_ was a fork. http://keiapl.org/rhui/remember.htm#fork3 ----- Original Message ----- From: John Randall <[email protected]> Date: Sunday, February 1, 2009 15:21 Subject: [Jprogramming] Examples of dyadic forks To: JProgramming <[email protected]> > Does anyone have a good example of a dyadic fork? By this > I mean one > of the form fgh where f and g both use x and y, there are no [ > or ], > no constant functions, and no @ or @: . I am having > trouble coming up > with nontrivial examples. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
