Mark several tests as random to avoid test failure #39153

user202729 · 2024-12-18T09:26:43Z

This fails sometimes in e.g. https://github.com/sagemath/sage/actions/runs/12388661556/job/34580166155?pr=39152#step:10:9714

Marking this as random looks reasonable because one of the test above (specifying the exact embedding) is also marked as random, and if the embedding is random then of course the element representation in terms of the generator a should also be random.

More context:

the first # random is added first in 37fc8e8#diff-c63508ebde0716605e6cdac05e43c8945616c2245158d30ff5ae39936ff4d9a0R1892
then the note that number_field_elements_from_algebraics is OS-dependent ("32 versus 64 bit") is removed at 61e4df9 for reasons I can't figure out. (how to find out the discussion around a commit? it was before trac to GitHub migration)

Should the entry in /.github/workflows/ci-conda-known-test-failures.json be removed?

    "sage.rings.qqbar": {
        "failed": "unreported failure on macOS seen in https://github.com/sagemath/sage/actions/runs/9525536510/job/26259809272?pr=37998"
    },

📝 Checklist

The title is concise and informative.
The description explains in detail what this PR is about.
I have linked a relevant issue or discussion.
I have updated the documentation and checked the documentation preview.

⌛ Dependencies

Other failing tests:

TESTS:

Number fields defined by non-monic and non-integral
polynomials are supported (:issue:`252`)::

    sage: K.<a> = NumberField(2*x^4 + 6*x^2 + 1/2)
    sage: K.optimized_subfields()
    [
    (Number Field in a0 with defining polynomial x, Ring morphism:
      From: Number Field in a0 with defining polynomial x
      To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
      Defn: 0 |--> 0, None),
    (Number Field in a1 with defining polynomial x^2 - 2*x + 2, Ring morphism:
      From: Number Field in a1 with defining polynomial x^2 - 2*x + 2
      To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
      Defn: a1 |--> a^3 + 7/2*a + 1, None),
    (Number Field in a2 with defining polynomial x^2 - 2*x + 2, Ring morphism:
      From: Number Field in a2 with defining polynomial x^2 - 2*x + 2
      To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
      Defn: a2 |--> -a^3 - 7/2*a + 1, None),
    (Number Field in a3 with defining polynomial x^2 - 2, Ring morphism:
      From: Number Field in a3 with defining polynomial x^2 - 2
      To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
      Defn: a3 |--> a^2 + 3/2, None),
    (Number Field in a4 with defining polynomial x^2 + 1, Ring morphism:
      From: Number Field in a4 with defining polynomial x^2 + 1
      To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
      Defn: a4 |--> a^3 + 7/2*a, None),
    (Number Field in a5 with defining polynomial x^2 + 2, Ring morphism:
      From: Number Field in a5 with defining polynomial x^2 + 2
      To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
      Defn: a5 |--> 2*a^3 + 5*a, None),
    (Number Field in a6 with defining polynomial x^4 + 1, Ring morphism:
      From: Number Field in a6 with defining polynomial x^4 + 1
      To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
      Defn: a6 |--> a^3 + 1/2*a^2 + 5/2*a + 3/4, Ring morphism:
      From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
      To:   Number Field in a6 with defining polynomial x^4 + 1
      Defn: a |--> -1/2*a6^3 + a6^2 - 1/2*a6)
    ]

I look into what determines the ordering.
It uses _subfields_helper which uses either f.polred(2) or f.nfsubfields(degree),
and there's no sorting going on.

Conclusion: marking as random sort order is fine. In fact it doesn't even say which subfields
should be returned exactly, and other tests in that function are marked as # random anyway,
so marking as # random is fine.

2024-12-18T08:35:49.0399180Z File "src/sage/rings/number_field/number_field.py", line 8777, in sage.rings.number_field.number_field.NumberField_absolute.subfields
2024-12-18T08:35:49.0500510Z Failed example:
2024-12-18T08:35:49.0601390Z     K.subfields()
2024-12-18T08:35:49.0707380Z Expected:
2024-12-18T08:35:49.0829700Z     [
2024-12-18T08:35:49.1013090Z     (Number Field in a0 with defining polynomial x, Ring morphism:
2024-12-18T08:35:49.1114120Z       From: Number Field in a0 with defining polynomial x
2024-12-18T08:35:49.1215190Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.1319910Z       Defn: 0 |--> 0, None),
2024-12-18T08:35:49.1426370Z     (Number Field in a1 with defining polynomial x^2 - 2, Ring morphism:
2024-12-18T08:35:49.1528730Z       From: Number Field in a1 with defining polynomial x^2 - 2
2024-12-18T08:35:49.1631010Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.1659980Z       Defn: a1 |--> a^2 + 3/2, None),
2024-12-18T08:35:49.1761220Z     (Number Field in a2 with defining polynomial x^2 + 4, Ring morphism:
2024-12-18T08:35:49.1862420Z       From: Number Field in a2 with defining polynomial x^2 + 4
2024-12-18T08:35:49.1970640Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.2072220Z       Defn: a2 |--> 2*a^3 + 7*a, None),
2024-12-18T08:35:49.2173950Z     (Number Field in a3 with defining polynomial x^2 + 2, Ring morphism:
2024-12-18T08:35:49.2275370Z       From: Number Field in a3 with defining polynomial x^2 + 2
2024-12-18T08:35:49.2368240Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.2476650Z       Defn: a3 |--> 2*a^3 + 5*a, None),
2024-12-18T08:35:49.2570570Z     (Number Field in a4 with defining polynomial x^4 + 1, Ring morphism:
2024-12-18T08:35:49.2672100Z       From: Number Field in a4 with defining polynomial x^4 + 1
2024-12-18T08:35:49.2774030Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.2875400Z       Defn: a4 |--> a^3 + 1/2*a^2 + 5/2*a + 3/4, Ring morphism:
2024-12-18T08:35:49.2977450Z       From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.3080080Z       To:   Number Field in a4 with defining polynomial x^4 + 1
2024-12-18T08:35:49.3179890Z       Defn: a |--> -1/2*a4^3 + a4^2 - 1/2*a4)
2024-12-18T08:35:49.3281410Z     ]
2024-12-18T08:35:49.3382370Z Got:
2024-12-18T08:35:49.3483260Z     [
2024-12-18T08:35:49.3584610Z     (Number Field in a0 with defining polynomial x, Ring morphism:
2024-12-18T08:35:49.3643330Z       From: Number Field in a0 with defining polynomial x
2024-12-18T08:35:49.3714430Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.3816090Z       Defn: 0 |--> 0, None),
2024-12-18T08:35:49.3923670Z     (Number Field in a1 with defining polynomial x^2 - 2, Ring morphism:
2024-12-18T08:35:49.4037810Z       From: Number Field in a1 with defining polynomial x^2 - 2
2024-12-18T08:35:49.4142230Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.4289560Z       Defn: a1 |--> -a^2 - 3/2, None),
2024-12-18T08:35:49.4391330Z     (Number Field in a2 with defining polynomial x^2 + 4, Ring morphism:
2024-12-18T08:35:49.4492300Z       From: Number Field in a2 with defining polynomial x^2 + 4
2024-12-18T08:35:49.4602960Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.4705310Z       Defn: a2 |--> -2*a^3 - 7*a, None),
2024-12-18T08:35:49.4793770Z     (Number Field in a3 with defining polynomial x^2 + 2, Ring morphism:
2024-12-18T08:35:49.4794540Z       From: Number Field in a3 with defining polynomial x^2 + 2
2024-12-18T08:35:49.4795030Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.4795830Z       Defn: a3 |--> 2*a^3 + 5*a, None),
2024-12-18T08:35:49.4796320Z     (Number Field in a4 with defining polynomial x^4 + 1, Ring morphism:
2024-12-18T08:35:49.4796780Z       From: Number Field in a4 with defining polynomial x^4 + 1
2024-12-18T08:35:49.4797230Z       To:   Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.4797760Z       Defn: a4 |--> a^3 - 1/2*a^2 + 5/2*a - 3/4, Ring morphism:
2024-12-18T08:35:49.4798180Z       From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2
2024-12-18T08:35:49.4852940Z       To:   Number Field in a4 with defining polynomial x^4 + 1
2024-12-18T08:35:49.4987040Z       Defn: a |--> -1/2*a4^3 - a4^2 - 1/2*a4)
2024-12-18T08:35:49.5088200Z     ]

Uses https://pari.math.u-bordeaux.fr/dochtml/html/General_number_fields.html#se:nfsubfields internally. It doesn't state any resulting sort order, so I just reorder them (the discriminants are all distincts so it's fine).

Alternatively it looks like just doctest against the set() of it might work.

github-actions · 2024-12-18T10:09:12Z

Documentation preview for this PR (built with commit 7e0ebbe; changes) is ready! 🎉
This preview will update shortly after each push to this PR.

tobiasdiez

Thanks!

This fails sometimes in e.g. https://github.com/sagemath/sage/actions/ru ns/12388661556/job/34580166155?pr=39152#step:10:9714 Marking this as random looks reasonable because one of the test above (specifying the exact embedding) is also marked as random, and if the embedding is random then of course the element representation in terms of the generator `a` should also be random. More context: * the first `# random` is added first in https://github.com/sagemath/sag e/commit/37fc8e88689a0197c5513161b85b8bbadd5630ab#diff- c63508ebde0716605e6cdac05e43c8945616c2245158d30ff5ae39936ff4d9a0R1892 * then the note that `number_field_elements_from_algebraics` is OS- dependent ("32 versus 64 bit") is removed at https://github.com/sagemath /sage/commit/61e4df9fabf9e06a21d75eb6320ab3179bc28096 for reasons I can't figure out. (how to find out the discussion around a commit? it was before trac to GitHub migration) ------ Should the entry in `/.github/workflows/ci-conda-known-test- failures.json` be removed? ``` "sage.rings.qqbar": { "failed": "unreported failure on macOS seen in https://github.co m/sagemath/sage/actions/runs/9525536510/job/26259809272?pr=37998" }, ``` ### 📝 Checklist  - [x] The title is concise and informative. - [x] The description explains in detail what this PR is about. - [x] I have linked a relevant issue or discussion. - [ ] I have updated the documentation and checked the documentation preview. ### ⌛ Dependencies    ------ Other failing tests: ``` TESTS: Number fields defined by non-monic and non-integral polynomials are supported (:issue:`252`):: sage: K.<a> = NumberField(2*x^4 + 6*x^2 + 1/2) sage: K.optimized_subfields() [ (Number Field in a0 with defining polynomial x, Ring morphism: From: Number Field in a0 with defining polynomial x To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: 0 |--> 0, None), (Number Field in a1 with defining polynomial x^2 - 2*x + 2, Ring morphism: From: Number Field in a1 with defining polynomial x^2 - 2*x + 2 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a1 |--> a^3 + 7/2*a + 1, None), (Number Field in a2 with defining polynomial x^2 - 2*x + 2, Ring morphism: From: Number Field in a2 with defining polynomial x^2 - 2*x + 2 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a2 |--> -a^3 - 7/2*a + 1, None), (Number Field in a3 with defining polynomial x^2 - 2, Ring morphism: From: Number Field in a3 with defining polynomial x^2 - 2 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a3 |--> a^2 + 3/2, None), (Number Field in a4 with defining polynomial x^2 + 1, Ring morphism: From: Number Field in a4 with defining polynomial x^2 + 1 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a4 |--> a^3 + 7/2*a, None), (Number Field in a5 with defining polynomial x^2 + 2, Ring morphism: From: Number Field in a5 with defining polynomial x^2 + 2 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a5 |--> 2*a^3 + 5*a, None), (Number Field in a6 with defining polynomial x^4 + 1, Ring morphism: From: Number Field in a6 with defining polynomial x^4 + 1 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a6 |--> a^3 + 1/2*a^2 + 5/2*a + 3/4, Ring morphism: From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 To: Number Field in a6 with defining polynomial x^4 + 1 Defn: a |--> -1/2*a6^3 + a6^2 - 1/2*a6) ] ``` I look into what determines the ordering. It uses `_subfields_helper` which uses either `f.polred(2)` or `f.nfsubfields(degree)`, and there's no sorting going on. Conclusion: marking as `random sort order` is fine. In fact it doesn't even say which subfields should be returned exactly, and other tests in that function are marked as `# random` anyway, so marking as `# random` is fine. ------ ``` 2024-12-18T08:35:49.0399180Z File "src/sage/rings/number_field/number_field.py", line 8777, in sage.rings.number_field.number_field.NumberField_absolute.subfields 2024-12-18T08:35:49.0500510Z Failed example: 2024-12-18T08:35:49.0601390Z K.subfields() 2024-12-18T08:35:49.0707380Z Expected: 2024-12-18T08:35:49.0829700Z [ 2024-12-18T08:35:49.1013090Z (Number Field in a0 with defining polynomial x, Ring morphism: 2024-12-18T08:35:49.1114120Z From: Number Field in a0 with defining polynomial x 2024-12-18T08:35:49.1215190Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.1319910Z Defn: 0 |--> 0, None), 2024-12-18T08:35:49.1426370Z (Number Field in a1 with defining polynomial x^2 - 2, Ring morphism: 2024-12-18T08:35:49.1528730Z From: Number Field in a1 with defining polynomial x^2 - 2 2024-12-18T08:35:49.1631010Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.1659980Z Defn: a1 |--> a^2 + 3/2, None), 2024-12-18T08:35:49.1761220Z (Number Field in a2 with defining polynomial x^2 + 4, Ring morphism: 2024-12-18T08:35:49.1862420Z From: Number Field in a2 with defining polynomial x^2 + 4 2024-12-18T08:35:49.1970640Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.2072220Z Defn: a2 |--> 2*a^3 + 7*a, None), 2024-12-18T08:35:49.2173950Z (Number Field in a3 with defining polynomial x^2 + 2, Ring morphism: 2024-12-18T08:35:49.2275370Z From: Number Field in a3 with defining polynomial x^2 + 2 2024-12-18T08:35:49.2368240Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.2476650Z Defn: a3 |--> 2*a^3 + 5*a, None), 2024-12-18T08:35:49.2570570Z (Number Field in a4 with defining polynomial x^4 + 1, Ring morphism: 2024-12-18T08:35:49.2672100Z From: Number Field in a4 with defining polynomial x^4 + 1 2024-12-18T08:35:49.2774030Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.2875400Z Defn: a4 |--> a^3 + 1/2*a^2 + 5/2*a + 3/4, Ring morphism: 2024-12-18T08:35:49.2977450Z From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.3080080Z To: Number Field in a4 with defining polynomial x^4 + 1 2024-12-18T08:35:49.3179890Z Defn: a |--> -1/2*a4^3 + a4^2 - 1/2*a4) 2024-12-18T08:35:49.3281410Z ] 2024-12-18T08:35:49.3382370Z Got: 2024-12-18T08:35:49.3483260Z [ 2024-12-18T08:35:49.3584610Z (Number Field in a0 with defining polynomial x, Ring morphism: 2024-12-18T08:35:49.3643330Z From: Number Field in a0 with defining polynomial x 2024-12-18T08:35:49.3714430Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.3816090Z Defn: 0 |--> 0, None), 2024-12-18T08:35:49.3923670Z (Number Field in a1 with defining polynomial x^2 - 2, Ring morphism: 2024-12-18T08:35:49.4037810Z From: Number Field in a1 with defining polynomial x^2 - 2 2024-12-18T08:35:49.4142230Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4289560Z Defn: a1 |--> -a^2 - 3/2, None), 2024-12-18T08:35:49.4391330Z (Number Field in a2 with defining polynomial x^2 + 4, Ring morphism: 2024-12-18T08:35:49.4492300Z From: Number Field in a2 with defining polynomial x^2 + 4 2024-12-18T08:35:49.4602960Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4705310Z Defn: a2 |--> -2*a^3 - 7*a, None), 2024-12-18T08:35:49.4793770Z (Number Field in a3 with defining polynomial x^2 + 2, Ring morphism: 2024-12-18T08:35:49.4794540Z From: Number Field in a3 with defining polynomial x^2 + 2 2024-12-18T08:35:49.4795030Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4795830Z Defn: a3 |--> 2*a^3 + 5*a, None), 2024-12-18T08:35:49.4796320Z (Number Field in a4 with defining polynomial x^4 + 1, Ring morphism: 2024-12-18T08:35:49.4796780Z From: Number Field in a4 with defining polynomial x^4 + 1 2024-12-18T08:35:49.4797230Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4797760Z Defn: a4 |--> a^3 - 1/2*a^2 + 5/2*a - 3/4, Ring morphism: 2024-12-18T08:35:49.4798180Z From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4852940Z To: Number Field in a4 with defining polynomial x^4 + 1 2024-12-18T08:35:49.4987040Z Defn: a |--> -1/2*a4^3 - a4^2 - 1/2*a4) 2024-12-18T08:35:49.5088200Z ] ``` Uses https://pari.math.u- bordeaux.fr/dochtml/html/General_number_fields.html#se:nfsubfields internally. It doesn't state any resulting sort order, so I just reorder them (the discriminants are all distincts so it's fine). Alternatively it looks like just doctest against the `set()` of it might work. ------ URL: sagemath#39153 Reported by: user202729 Reviewer(s): Tobias Diez

user202729 · 2024-12-23T06:36:51Z

Apparently merge upstream from git makes the bot reset the label to [needs review]… can you change back the label? Thanks.

tobiasdiez · 2024-12-24T03:36:47Z

Done!
You can ask to join https://github.com/orgs/sagemath/teams/triage, then you can change the labels in the future yourself.

user202729 · 2025-01-05T03:24:41Z

Merge conflict with #39027 prevents this one from being merged from 10.6.beta3 . Fixed now.

This fails sometimes in e.g. https://github.com/sagemath/sage/actions/ru ns/12388661556/job/34580166155?pr=39152#step:10:9714 Marking this as random looks reasonable because one of the test above (specifying the exact embedding) is also marked as random, and if the embedding is random then of course the element representation in terms of the generator `a` should also be random. More context: * the first `# random` is added first in https://github.com/sagemath/sag e/commit/37fc8e88689a0197c5513161b85b8bbadd5630ab#diff- c63508ebde0716605e6cdac05e43c8945616c2245158d30ff5ae39936ff4d9a0R1892 * then the note that `number_field_elements_from_algebraics` is OS- dependent ("32 versus 64 bit") is removed at https://github.com/sagemath /sage/commit/61e4df9fabf9e06a21d75eb6320ab3179bc28096 for reasons I can't figure out. (how to find out the discussion around a commit? it was before trac to GitHub migration) ------ Should the entry in `/.github/workflows/ci-conda-known-test- failures.json` be removed? ``` "sage.rings.qqbar": { "failed": "unreported failure on macOS seen in https://github.co m/sagemath/sage/actions/runs/9525536510/job/26259809272?pr=37998" }, ``` ### 📝 Checklist  - [x] The title is concise and informative. - [x] The description explains in detail what this PR is about. - [x] I have linked a relevant issue or discussion. - [ ] I have updated the documentation and checked the documentation preview. ### ⌛ Dependencies    ------ Other failing tests: ``` TESTS: Number fields defined by non-monic and non-integral polynomials are supported (:issue:`252`):: sage: K.<a> = NumberField(2*x^4 + 6*x^2 + 1/2) sage: K.optimized_subfields() [ (Number Field in a0 with defining polynomial x, Ring morphism: From: Number Field in a0 with defining polynomial x To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: 0 |--> 0, None), (Number Field in a1 with defining polynomial x^2 - 2*x + 2, Ring morphism: From: Number Field in a1 with defining polynomial x^2 - 2*x + 2 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a1 |--> a^3 + 7/2*a + 1, None), (Number Field in a2 with defining polynomial x^2 - 2*x + 2, Ring morphism: From: Number Field in a2 with defining polynomial x^2 - 2*x + 2 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a2 |--> -a^3 - 7/2*a + 1, None), (Number Field in a3 with defining polynomial x^2 - 2, Ring morphism: From: Number Field in a3 with defining polynomial x^2 - 2 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a3 |--> a^2 + 3/2, None), (Number Field in a4 with defining polynomial x^2 + 1, Ring morphism: From: Number Field in a4 with defining polynomial x^2 + 1 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a4 |--> a^3 + 7/2*a, None), (Number Field in a5 with defining polynomial x^2 + 2, Ring morphism: From: Number Field in a5 with defining polynomial x^2 + 2 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a5 |--> 2*a^3 + 5*a, None), (Number Field in a6 with defining polynomial x^4 + 1, Ring morphism: From: Number Field in a6 with defining polynomial x^4 + 1 To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 Defn: a6 |--> a^3 + 1/2*a^2 + 5/2*a + 3/4, Ring morphism: From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 To: Number Field in a6 with defining polynomial x^4 + 1 Defn: a |--> -1/2*a6^3 + a6^2 - 1/2*a6) ] ``` I look into what determines the ordering. It uses `_subfields_helper` which uses either `f.polred(2)` or `f.nfsubfields(degree)`, and there's no sorting going on. Conclusion: marking as `random sort order` is fine. In fact it doesn't even say which subfields should be returned exactly, and other tests in that function are marked as `# random` anyway, so marking as `# random` is fine. ------ ``` 2024-12-18T08:35:49.0399180Z File "src/sage/rings/number_field/number_field.py", line 8777, in sage.rings.number_field.number_field.NumberField_absolute.subfields 2024-12-18T08:35:49.0500510Z Failed example: 2024-12-18T08:35:49.0601390Z K.subfields() 2024-12-18T08:35:49.0707380Z Expected: 2024-12-18T08:35:49.0829700Z [ 2024-12-18T08:35:49.1013090Z (Number Field in a0 with defining polynomial x, Ring morphism: 2024-12-18T08:35:49.1114120Z From: Number Field in a0 with defining polynomial x 2024-12-18T08:35:49.1215190Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.1319910Z Defn: 0 |--> 0, None), 2024-12-18T08:35:49.1426370Z (Number Field in a1 with defining polynomial x^2 - 2, Ring morphism: 2024-12-18T08:35:49.1528730Z From: Number Field in a1 with defining polynomial x^2 - 2 2024-12-18T08:35:49.1631010Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.1659980Z Defn: a1 |--> a^2 + 3/2, None), 2024-12-18T08:35:49.1761220Z (Number Field in a2 with defining polynomial x^2 + 4, Ring morphism: 2024-12-18T08:35:49.1862420Z From: Number Field in a2 with defining polynomial x^2 + 4 2024-12-18T08:35:49.1970640Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.2072220Z Defn: a2 |--> 2*a^3 + 7*a, None), 2024-12-18T08:35:49.2173950Z (Number Field in a3 with defining polynomial x^2 + 2, Ring morphism: 2024-12-18T08:35:49.2275370Z From: Number Field in a3 with defining polynomial x^2 + 2 2024-12-18T08:35:49.2368240Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.2476650Z Defn: a3 |--> 2*a^3 + 5*a, None), 2024-12-18T08:35:49.2570570Z (Number Field in a4 with defining polynomial x^4 + 1, Ring morphism: 2024-12-18T08:35:49.2672100Z From: Number Field in a4 with defining polynomial x^4 + 1 2024-12-18T08:35:49.2774030Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.2875400Z Defn: a4 |--> a^3 + 1/2*a^2 + 5/2*a + 3/4, Ring morphism: 2024-12-18T08:35:49.2977450Z From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.3080080Z To: Number Field in a4 with defining polynomial x^4 + 1 2024-12-18T08:35:49.3179890Z Defn: a |--> -1/2*a4^3 + a4^2 - 1/2*a4) 2024-12-18T08:35:49.3281410Z ] 2024-12-18T08:35:49.3382370Z Got: 2024-12-18T08:35:49.3483260Z [ 2024-12-18T08:35:49.3584610Z (Number Field in a0 with defining polynomial x, Ring morphism: 2024-12-18T08:35:49.3643330Z From: Number Field in a0 with defining polynomial x 2024-12-18T08:35:49.3714430Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.3816090Z Defn: 0 |--> 0, None), 2024-12-18T08:35:49.3923670Z (Number Field in a1 with defining polynomial x^2 - 2, Ring morphism: 2024-12-18T08:35:49.4037810Z From: Number Field in a1 with defining polynomial x^2 - 2 2024-12-18T08:35:49.4142230Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4289560Z Defn: a1 |--> -a^2 - 3/2, None), 2024-12-18T08:35:49.4391330Z (Number Field in a2 with defining polynomial x^2 + 4, Ring morphism: 2024-12-18T08:35:49.4492300Z From: Number Field in a2 with defining polynomial x^2 + 4 2024-12-18T08:35:49.4602960Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4705310Z Defn: a2 |--> -2*a^3 - 7*a, None), 2024-12-18T08:35:49.4793770Z (Number Field in a3 with defining polynomial x^2 + 2, Ring morphism: 2024-12-18T08:35:49.4794540Z From: Number Field in a3 with defining polynomial x^2 + 2 2024-12-18T08:35:49.4795030Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4795830Z Defn: a3 |--> 2*a^3 + 5*a, None), 2024-12-18T08:35:49.4796320Z (Number Field in a4 with defining polynomial x^4 + 1, Ring morphism: 2024-12-18T08:35:49.4796780Z From: Number Field in a4 with defining polynomial x^4 + 1 2024-12-18T08:35:49.4797230Z To: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4797760Z Defn: a4 |--> a^3 - 1/2*a^2 + 5/2*a - 3/4, Ring morphism: 2024-12-18T08:35:49.4798180Z From: Number Field in a with defining polynomial 2*x^4 + 6*x^2 + 1/2 2024-12-18T08:35:49.4852940Z To: Number Field in a4 with defining polynomial x^4 + 1 2024-12-18T08:35:49.4987040Z Defn: a |--> -1/2*a4^3 - a4^2 - 1/2*a4) 2024-12-18T08:35:49.5088200Z ] ``` Uses https://pari.math.u- bordeaux.fr/dochtml/html/General_number_fields.html#se:nfsubfields internally. It doesn't state any resulting sort order, so I just reorder them (the discriminants are all distincts so it's fine). Alternatively it looks like just doctest against the `set()` of it might work. ------ URL: sagemath#39153 Reported by: user202729 Reviewer(s): Tobias Diez

Mark test in qqbar.py as random to avoid test failure

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user202729 changed the title ~~Mark test in qqbar.py as random to avoid test failure~~ Mark several tests as random to avoid test failure Dec 18, 2024

Make a few more tests deterministic

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Merge remote-tracking branch 'upstream/develop' into ci-fix-qqbar

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Mark several tests as random to avoid test failure #39153

Mark several tests as random to avoid test failure #39153

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user202729 commented Jan 5, 2025

Mark several tests as random to avoid test failure #39153

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Mark several tests as random to avoid test failure #39153

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