@hackage numbered-semigroups0.1.1.0

Some types are composable in multiple “directions”, either in a literal sense (diagrams can be stacked vertically, as well as layed out side-by-side) or in an abstraction (matrices etc.). This package offers a whole sequence of semigroup-classes, numbered by type-literals, as a unified interface for composition of such types. It also has a bunch of standardised operators for writing out the compositions in a snug way.