At first I thought this was a tardy April Fools joke. I seem to remember some APLs had a rank limit in the 60s but like many I’ve never used ranks beyond 10.
Sent from my iPhone > On Apr 4, 2021, at 09:09, Roger Hui <[email protected]> wrote: > > So Henry, can you imagine yourself doing FFT on a sparse hypercube, sparse > because many of the entries are 0? For this application not having rank > restricted to 63 or less would be nice. > > > > > On Sun, Apr 4, 2021 at 8:04 AM Roger Hui <[email protected]> wrote: > >>> I haven't used rank beyond 6 that I can recall, if that. >> >> FFT uses a high rank array, a hypercube with shape (>.2^.#x)$2 . Of >> course, a rank-64 hypercube would blow current computers out of the water. >> >> https://code.jsoftware.com/wiki/Essays/FFT >> >> >> >> On Sun, Apr 4, 2021 at 7:55 AM 'robert therriault' via Programming < >> [email protected]> wrote: >> >>> I haven't used rank beyond 6 that I can recall, if that. >>> >>> I suppose that I could get around the limit by boxing items of a higher >>> rank to reduce them to lower rank and using one verb to manipulate the >>> boxes and another to manipulate the dimensions within the box. >>> >>> What is the performance advantage to setting a boundary? >>> >>> >>>> On Apr 4, 2021, at 07:45, bill lam <[email protected]> wrote: >>>> >>>> What's special about 63? Why not 128, say. >>>> >>>>> On Sun, Apr 4, 2021, 9:52 PM Henry Rich <[email protected]> wrote: >>>>> >>>>>> I propose that the maximum value for a rank, whether of a verb or a >>>>>> noun, will be 63. Minimum verb rank will be _63. >>>>>> >>>>>> You got a problem with that? >>>>>> >>>>>> Henry Rich >>>>>> >>>>>> -- >>>>>> This email has been checked for viruses by AVG. >>>>>> https://www.avg.com >>>>>> >>>>>> ---------------------------------------------------------------------- >>>>>> For information about J forums see http://www.jsoftware.com/forums.htm >>>>>> >>>>> ---------------------------------------------------------------------- >>>>> For information about J forums see http://www.jsoftware.com/forums.htm >>> >>> ---------------------------------------------------------------------- >>> For information about J forums see http://www.jsoftware.com/forums.htm >>> >> > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
