All these algorithms are memory-efficient and scale. A good PDF will present them in a table for N=4,5,6,7 side-by-side.

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: Align matching edge pieces together so they act as a single unit (e.g., pairing 2 pieces for a 4x4 or 3 for a 5x5).

Fixes a single flipped edge pair. r U2 r U2 r' U2 r U2 l' U2 r U2 r' U2 x' y' r U2 r' (Note: In PDFs, this is often abbreviated with slice notation.)