Ebook: Notes Groups Acting on sets or G-sets

Published online. — 3 p. English.[Department of Mathematics. University of Hawaii, (May 26) 2009].The notion of a group acting on a set is an old one.
The groups studied by Galois consisted of groups of permutations of roots of a polynomial.
The notion of a group acting on a set is a slightly more general notion.
We will study this notion from the point of view of universal algebra.
Some of the associated notions are clearer this way.