For l=2 we can use the indexes of a sparse identity matrix. Set the
common value to 1. I haven't given any thought to generalization for
higher dimensions.
vardwl2=: 4$.$.@:-.@:=@:i.
;/ vardwl2 4
┌───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┬───┐
│0 1│0 2│0 3│1 0│1 2│1 3│2 0│2 1│2 3│3 0│3 1│3 2│
└───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┴───┘
Date: Fri, 8 Dec 2017 15:30:33 -0500
From: Jimmy Gauvin<[email protected]>
To:[email protected]
Subject: Re: [Jprogramming] contents of a package, permutations
Message-ID:
<caelwgocckair1rvd_fb_t+e+6n10zdncsr6jtarmha5jdek...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
There is a recent thread you might be interested in:
http://jsoftware.com/pipermail/programming/2017-August/048275.html
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