Re: [Bug-apl] Modulo or residue function is not generating consistent complete residue systems for some arguments

[Juergen Sauermann]

Hi Fred, I am glad to hear that. It is in SVN 971 now. It was Jay who moved us into the right direction, thanks for that. I had used the Donell paper earlier (when designing complex floor) but the borderline cases (i.e. when ⎕CT makes a difference) were not considered in the paper, and the descriptions in both ISO and the APL2 language reference are entirely misleading in that respect. Have a nice weekend, Best Regards, /// Jürgen On 06/24/2017 07:55 PM, Frederick Pitts wrote: Hello Jürgen, SUCCESS. The cut-and-paste below from my platform is identical to yours       5J3 | ¯7J6 ⎕CT is: 1e-13 modulus (A) is: (5,3) A=0 is: (0,0) A+A=0 is: (5,3) B÷A+A=0 is: (-0.5,1.5) ⌊B÷A+A=0 is: (0,1) A×⌊B÷A+A=0 is: (-3,5) B-A×⌊B÷A+A=0 is: (-4,1) ¯4J1 and 5J3 | 4J¯1 ¯4J1 give the correct answer too. If you want, I can patch the undebugged version of Complex.cc and run a battery of tests. If not, I will wait and run the tests on the next SVN version. I think i need to find something useful to do with Gaussian integers. Regards, Fred