The data-category package

[Tags:bsd3, library]

Data-category is a collection of categories, and some categorical constructions on them.

You can restrict the types of the objects of your category by using a GADT for the arrow type. To be able to proof to the compiler that a type is an object in some category, objects also need to be represented at the value level. The corresponding identity arrow of the object is used for that.

See the Boolean and Product categories for some examples.

Note: Strictly speaking this package defines Hask-enriched categories, not ordinary categories (which are Set-enriched.) In practice this means we are allowed to ignore undefined (f.e. when talking about uniqueness of morphisms), and we can treat the categories as normal categories.

Properties

Versions 0.0.1, 0.0.2, 0.0.3, 0.0.3.1, 0.1.0, 0.2.0, 0.3.0, 0.3.0.1, 0.3.0.2, 0.3.1, 0.3.1.1, 0.4, 0.4.1, 0.5.0, 0.5.1, 0.5.1.0, 0.5.1.1, 0.6.0, 0.6.1
Dependencies None [details]
License BSD3
Author Sjoerd Visscher
Maintainer sjoerd@w3future.com
Stability experimental
Category Math
Home page http://github.com/sjoerdvisscher/data-category
Bug tracker http://github.com/sjoerdvisscher/data-category/issues
Source repository head: git clone git://github.com/sjoerdvisscher/data-category.git
Uploaded Tue Dec 18 19:45:34 UTC 2012 by SjoerdVisscher
Distributions NixOS:0.6.1
Downloads 3606 total (39 in the last 30 days)
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Status Docs uploaded by user
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