Topic
Symmetry and counting
2 concepts and 20 practice problems on symmetry and counting, part of Enumerative combinatorics.
2concepts
20exercises
≈ 1 hof study approx.
Concepts
- Orbit and stabilizer from Modern algebra I 10 exercisesIf a group G acts on a set X, the orbit of x∈ X is the set of all its images g· x, and its stabilizer is the subgroup of elements…
- Burnside's lemma 10 exercisesBurnside's lemma (also called the Cauchy-Frobenius lemma) states that the number of orbits of a finite group G acting on a set X…