There is a water-break formed by a small terrace of rock in mid-stream, and purling with a hollow, delicious monotone—an island of pebbles is above, with here and there smaller ones near the forks.

Assessing the historical record, former presidential aide and student of the Presidency Theodore Sorensen once quipped that some Presidents use the Executive Office “as a farm league, some use it as a source of experts and implementers, and some use it as Elba."

This function forcely deletes the i-th scene graph. Since any spatial index object has a reference to a scene graph that owns this spatial index, when the scene graph is forcely deleted, the corresponding spatial index must reset the scene graph reference, or just delete the spatial index.

In this work, we mostly focus on an inpainting algorithm that was introduced in recent CMB analyses to cure cut-sky suboptimalities of bispectrum estimators.