algebra
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Note: most of these files are ported from the standard library. If anything needs to be changed, it is probably a good idea to change it in the standard library and then port the file again (see also [script/port.pl](../../script/port.pl)).

* [binary](binary.hlean) : properties of binary operations
* [relation](relation.hlean) : properties of relations
* [group](group.hlean)
* [ring](ring.hlean)
* [ordered_group](ordered_group.hlean)
* [ordered_ring](ordered_ring.hlean)
* [field](field.hlean)

Subfolders:

* [category](category/category.md) : Category Theory