<p>In <a href="https://github.com/mlpack/mlpack/pull/724#discussion_r71200103">src/mlpack/core/tree/rectangle_tree/traits.hpp</a>:</p>
<pre style='color:#555'>> + template<typename> class SweepType,
> + typename DescentType,
> + template<typename> class AuxiliaryInformationType>
> +class TreeTraits<RectangleTree<MetricType,
> + StatisticType,
> + MatType,
> + RPlusTreeSplit<SplitPolicyType,
> + SweepType>,
> + DescentType,
> + AuxiliaryInformationType>>
> +{
> + public:
> + /**
> + * The R+/R++ tree can't have overlapping children.
> + */
> + static const bool HasOverlappingChildren = false;
</pre>
<p>I thought that there was a degenerate case that could occur with the R+ tree where nodes could end up overlapping. I don't remember the exact details; is that still true? Or did your code work around that situation?</p>
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