dropping support for kash? (RFC)

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Dima Pasechnik

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Jul 13, 2026, 2:35:37 AMJul 13
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kash3 is an old closed-source program, to which Sage provides
interfaces for doing computations of Galois groups of number fields,
and integer factorization.

It is only available in form of the binary downloads, dated back to
2008 or even earlier.
Cf. https://www.kantmath.de/download.shtml

We very much doubt any current or future user of Sage has any use for it.
Integer factorization isn't something which is not covered in Sage
otherwise, and its Galois
group computations capabilities are now covered by GAP.
See https://github.com/sagemath/sage/issues/42523 and
https://github.com/sagemath/sage/pull/42524

If there are no objections by the end of the week, we'll proceed to remove it.

Dima

kcrisman

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Jul 14, 2026, 7:59:53 AMJul 14
to sage-support
If there are no objections by the end of the week, we'll proceed to remove it.

Seems unlikely anyone will object in the circumstances, but it might be kind to send an email to the developers - presumably if it bounces that is a pretty good sign it's not a problem!  (I don't know what our current deprecation policy is, to be sure.)

Nils Bruin

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Jul 14, 2026, 1:11:43 PMJul 14
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It will bounce. KASH is a piece of computer algebra history. The people who developed it originally have retired or moved on -- many are still very productive members of the computational number theory community, but they do absolutely zero work on KASH. Work is now focussing on things like Oscar, FLINT, Magma, etc.

kcrisman

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Jul 15, 2026, 7:18:57 AMJul 15
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Thanks, I didn't see the sage-devel post which clarifies until later.  Interesting that the website is still up in that case!
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