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Commit d304331

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DOC fix multiclass AUC formulas in user guide (#18559)
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‎doc/modules/model_evaluation.rst

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@@ -1423,7 +1423,7 @@ uniformly:
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.. math::
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\frac{2}{c(c-1)}\sum_{j=1}^{c}\sum_{k > j}^c (\text{AUC}(j | k) +
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\frac{1}{c(c-1)}\sum_{j=1}^{c}\sum_{k > j}^c (\text{AUC}(j | k) +
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\text{AUC}(k | j))
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where :math:`c` is the number of classes and :math:`\text{AUC}(j | k)` is the
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.. math::
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\frac{2}{c(c-1)}\sum_{j=1}^{c}\sum_{k > j}^c p(j \cup k)(
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\frac{1}{c(c-1)}\sum_{j=1}^{c}\sum_{k > j}^c p(j \cup k)(
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\text{AUC}(j | k) + \text{AUC}(k | j))
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where :math:`c` is the number of classes. This algorithm is used by setting

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