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Tag Archives: associative law
Something I didn’t know
I didn’t know this, though probably I should have. Maybe you didn’t know it either. We work in a semigroup, a system with an operation (called multiplication) satisfying the associative law. A generalised inverse of an element A is an … Continue reading
Posted in exposition
Tagged associative law, commute, generalised inverse, matrices, polynomial
4 Comments
Combinatorial Yang-Baxter, 2
It is five years since Tatiana Gateva-Ivanova introduced me to the combinatorial Yang–Baxter equation. I may be slow; I have just understood why this is a good thing for a mathematician to study, aside from its applications in physics (whatever … Continue reading
Posted in exposition
Tagged 2-dimensional semigroups, associative law, semigroup, Yang-Baxter equation
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