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Package: libghc-semirings-dev (0.6-3 and others)

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two monoids as one, in holy haskimony

Haskellers are usually familiar with monoids and semigroups. A monoid has an appending operation `<>` (or `mappend`), and an identity element, `mempty`. A semigroup has an appending `<>` operation, but does not require a `mempty` element.

A Semiring has two appending operations, `plus` and `times`, and two respective identity elements, `zero` and `one`.

More formally, a Semiring R is a set equipped with two binary relations `+` and `*`, such that:

(R,+) is a commutative monoid with identity element 0,

(R,*) is a monoid with identity element 1,

(*) left and right distributes over addition, and

multiplication by '0' annihilates R.

This package provides a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.

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Architecture Version Package Size Installed Size Files
amd64 0.6-3+b1 276.8 kB2,819.0 kB [list of files]
arm64 0.6-3+b1 283.4 kB3,166.0 kB [list of files]
armel 0.6-3+b2 309.3 kB3,275.0 kB [list of files]
armhf 0.6-3+b2 304.8 kB3,252.0 kB [list of files]
i386 0.6-3 419.1 kB3,560.0 kB [list of files]
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s390x 0.6-3+b1 362.0 kB4,756.0 kB [list of files]