Re: [Bug-apl] Problem with modulo arithmetic on Gaussian integers redux

[Frederick Pitts]

Jürgen, Jay, Kacper,

The last time this error  occurred on my platform, you could not reproduce it on yours. However, Jay Foad and Kacper Gutowski were able to reproduce the error. Hopefully one or both of them or someone else on the Bug-apl list will be able to do so again.

Regards,

Fred

On Wed, 2017-06-14 at 14:04 +0200, Juergen Sauermann wrote:

Hi Fred,

not sure what to do about that. On my machine I am getting:

      1J3 ∣ 8J4
0

and your TGI0.apl program seems not to output anything.

Best Regqrds,
Jürgen Sauermann

On 06/14/2017 05:52 AM, Frederick Pitts wrote:

Juergen,

	I'm seeing errors with the mod (∣) operator applied to Gaussian
integers again.  With svn 896, the mod operator yields a nonzero
residual result while the division operator yields an exact Gaussian
integer quotient result as follows

      1J3 ∣ 8J4
1J3
      8J4 ÷ 1J3
2J¯2
      1J3 × 2J¯2
8J4

	I'm running Fedora 25, 64 bit, on an Intel Core i7-6700 4 core
CPU with 16 Gbyte memory.

	The attached TGI0.apl generates many more failure examples if
needed.

Regards,

Fred

TGI0.apl
Description: Text document