Dinv

The dinv statistic, read from the area sequence.

FindStatSt000006via DyckPath↗

Dinv(path)

Domain: Dyck path statistics

Details

• Defined over `DyckPath` as an expression in `_x`, evaluated by compute-engine — the definition IS the implementation.
• Takes a `DyckPath` and nothing else — it reads values against their positions, or walks the orbits, so it needs the bijection. Applying it to a bare list is a type error, not a wrong answer.
• dinv = #{i

Examples