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Fix two "Computational Math.." book doctests #36143

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merged 2 commits into from
Sep 1, 2023

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orlitzky
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Nothing interesting here, just two minor tweaks that are needed probably due to a giac upgrade.

@@ -253,7 +253,7 @@
Sage example in ./integration.tex, line 1363::

sage: t, y = var('t, y')
sage: desolve_rk4(t*y*(2-y), y, ics=[0,1], end_points=[0, 1], step=0.5)
sage: desolve_rk4(t*y*(2-y), y, ics=[0,1], end_points=[0, 1], step=0.5) # abs tol 1e-12
[[0, 1], [0.5, 1.12419127424558], [1.0, 1.461590162288825]]
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Please two spaces ...) # abs ... instead of one ...) # abs ...

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Sure, done.

@kwankyu
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kwankyu commented Aug 27, 2023

Otherwise, lgtm.

A "Computational Math..." book test fails for me with,

  Expected:
    [[0, 1], [0.5, 1.12419127424558], [1.0, 1.461590162288825]]
  Got:
    [[0, 1], [0.5, 1.12419127424558], [1.0, 1.4615901622888245]]

An "abs tol" fixes the issue backwards-compatibly.
One "Computational Math..." book test fails for me with,

  Expected:
    [[y(x) == -_C^2 + _C*x, y(x) == 1/4*x^2], 'clairault']
  Got:
    [[y(x) == -_C^2 + _C*x, y(x) == 1/4*x^2], 'clairaut']

This looks like a typo that was fixed. For backwards compatibility,
the doctest has been updated to accept both outputs in the second
component.
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Documentation preview for this PR (built with commit da754e1; changes) is ready! 🎉

sage: solution
[y(x) == -_C^2 + _C*x, y(x) == 1/4*x^2]
sage: method in ["clairaut", "clairault"]
True

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Do you mean that the typo "clairault" is hard-coded into giac, you expect that it would be fixed in future?

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I'm only guessing that giac is to blame:

  1. my giac is newer than sage's
  2. both "clairaut" and "clairault" appear in the giac source code
  3. there's no changelog for giac

But yes, my guess is that "clairault" was hard-coded somewhere and now it's "clairaut".

@kwankyu
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kwankyu commented Aug 27, 2023

There is a new failure in Build & Test. I checked that It is unrelated though.

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Thanks.

@vbraun vbraun merged commit 0d42e23 into sagemath:develop Sep 1, 2023
16 of 17 checks passed
@mkoeppe mkoeppe added this to the sage-10.2 milestone Sep 1, 2023
@orlitzky orlitzky deleted the fix-two-compmath-doctests branch September 22, 2023 00:19
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4 participants