/Я language (β)/Operators/dcpp'yo/

(`dcpp`) [D]ay [C]onvolution from [P]roduct into [P]roduct (`yo`) [Y]oneda functor mapping c[O]variantly
`dcpp'yo` : target ( ( t a ) `P` ( tt aa ) ) ( target ( source ( a `P` aa ) ( o ) ) ( t o ) )