[Jprogramming] substituting tie for at

[Raul Miller]

That said, note that you do not need to explicitly make the mobius
verb rank zero if you define it as
   */@:-@~:@q:

For example:
   */@:-@~:@q: 1+i.6
1 _1 _1 0 _1 1

But perhaps you would want to select a font which displays @
in a subdued manner.

-- 
Raul