Left leaning red black trees enforce extra constraints, which remove symmetries. This actually adds an edge case when instead you can just treat left/right rota

Left leaning red black trees enforce extra constraints, which remove symmetries. This actually adds an edge case when instead you can just treat left/right rotations and comparisons as symmetric operations. Left Leaning Red Black Trees Considerer Harmful: https://www.read.seas.harvard.edu/~kohler/notes/llrb.html https://www.read.seas.harvard.edu/~kohler/notes/llrb.html