Nifty! On 4/10/2021 at 5:22 PM, "Brian Schott" <[email protected]> wrote: > >I was even more surprised by this > >where &. undoes an inverse. > > >p=.(<:&.(p:^:_1))@*: > >p"0] 2+i. 10 > >3 7 13 23 31 47 61 79 97 113 > > >-- >(B=) >------------------------------------------------------------------- >--- >For information about J forums see >http://www.jsoftware.com/forums.htm
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