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cultmath: pin that a fixed column is never released

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Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-09-29 01:38:56 +02:00
commit eec1e40c25
1 changed files with 7 additions and 5 deletions
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12
packages/cultmath/tests/CultMath.Tests/BoundedLeastSquaresTests.cs
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@ -292,15 +292,17 @@ public sealed class BoundedLeastSquaresTests
}
[Fact]
public void FixedColumnStaysPut()
public void FixedColumnStaysPutEvenWhenItsGradientWantsOut()
{
const int m = 5, n = 3;
var lo = new[] { -1f, 0.25f, -1f };
var hi = new[] { 1f, 0.25f, 1f };
var lo = new[] { -1f, -1f, -1f };
var hi = new[] { 1f, -1f, 1f };
var x = new float[n];
var status = Solve(m, n, A54, B5, lo, hi, x, out _);
var status = Solve(m, n, A54, B5, lo, hi, x, out var iterations);
Assert.Equal(BoundedLeastSquaresStatus.Converged, status);
Assert.Equal(0.25f, x[1]);
Assert.Equal(-1f, x[1]);
Assert.True(Gradient(m, n, A54, B5, x)[1] < -1e-3, "fixture must pull the fixed column inward");
Assert.Equal(0, iterations);
AssertKkt(m, n, A54, B5, lo, hi, x);
}