Robuta

https://mathoverflow.net/questions/506940/is-there-a-name-for-monoid-group-acting-on-a-boolean-algebra lo.logic - Is there a name for "monoid/group acting on a boolean algebra"? - MathOverflow The structure I have in mind is simply a boolean algebra $B$ and a monoid $A$ acting on $B$ as morphisms of boolean algebras. A typical example of the concrete... boolean algebralonamemonoidgroup https://mathoverflow.net/questions/76254/what-is-so-plactic-about-the-plactic-monoid co.combinatorics - What is so "plactic" about the plactic monoid? - MathOverflow The plactic monoid is the monoid consisting of all words from the alphabet $\mathbb{Z}^+$ modulo certain relations. It is important mainly because its elements... what isabout thecomonoidmathoverflow https://factorcode.org/slava/monoids.html Slava's Monoid Zoo slavamonoidzoo https://larsenwork.com/monoid/ Monoid Monoid is a customizable, minimal + legible font optimized for coding. It's customisable with ligatures, alternates and class based positioning. monoid