/Я language (β)/Operators/yo/

[Y]oneda functor mapping c[O]variantly
`yo`² : target ( t a ) ( target ( source ( a ) ( o ) ) ( t o ) )

`yoi`³ : target ( t a _ ) ( target ( source ( a ) ( o ) ) ( t o _ ) )
`yio`³ : target ( t _ a ) ( target ( source ( a ) ( o ) ) ( t _ o ) )
`yoo`³ : target ( t a a ) ( target ( source ( a ) ( o ) ) ( t o o ) )

`yo`², `yo_`³, `yo__`⁴, `yo___`⁵, `yo____`⁶, `yo_____`⁷.