Murat Kasimov

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Я language (β)

/Я language (β)/Primitives/Prefix Tree/

: Supertype ( Prefix Tree i ii ) ~ ( Prefix List ( Construction ( Prefix List i ) ii ) ) : Basetype ( Prefix Tree i ii ) ~ ( Unit `S` List ( Supertype ( Construction ( Prefix List i ) ii ) ) )

Covariant Functor from Arrow into Arrow:

> `yo` : Prefix Tree _ a `AR______` a `AR` o `AR_____` Prefix Tree _ o