Wikipedia has an article on: R-tree Wikipedia The R stands for rectangle. R-tree (plural R-trees) (computing theory) A kind of tree data structure used to group...
English Wikipedia has an article on: R*-tree Wikipedia R*-tree R* tree (plural R* trees) (computing theory) A kind of R-tree used for indexing spatial information...
English Wikipedia has an article on: R+ tree Wikipedia R+ tree (plural R+ trees) (computing theory) A kind of R-tree used for geospatial data....
ℝ-order tree (plural ℝ-order trees) (topology) An order tree whose segments are homeomorphic to segments of the real line and that is the union of countably...
Hilbert R-tree (plural Hilbert R-trees) (computing theory) A kind of R-tree used for multidimensional objects....