Implement category for H, L, R, J trivials monoids

[avirmaux]

The aim is to integrate in the main Sage library the mature methods and examples for

• H-trivial monoids
• R-trivial monoids
• L-trivial monoids
• J-trivial monoids

from the Sage-Semigroups package. https://github.com/nthiery/sage-semigroups

CC: @nthiery @hivert @tscrim @saliola

Component: categories

Keywords: monoids, days64

Branch/Commit: public/18001 @ ea4a971

Issue created by migration from https://trac.sagemath.org/ticket/18001

[avirmaux]

Branch: u/virmaux/develop

[avirmaux]

Changed branch from u/virmaux/develop to u/virmaux/monoids

[nthiery]

New commits:

3b59784

Files for H, J, R, L trivial monoids, beginning of the implementation

[nthiery]

Dependencies: 18265

[nthiery]

Commit: 3b59784

[sagetrac-git]

Changed commit from 3b59784 to 4dbdfac

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

4dbdfac

18001: merge with develop

[sagetrac-git]

Changed commit from 4dbdfac to c389ef3

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. New commits:

c6ce643	18001: rebase with develop
30c19af	18001: rebase
c389ef3	18001: rebase (h_trivial)

[tscrim]

Changed dependencies from 18265 to #18265