Education
The seventeenth lecture in Dr Joel Feinstein's G11FPM Foundations of Pure Mathematics module covers permutations of sets, especially finite sets. The two-line form for permutations. Inverses for permutations and the identity permutation. Multiplication of permutations using function composition. These videos are also available on YouTube at: https://www.youtube.com/playlist?list=PLpRE0Zu_k-BzsKBqQ-HEqD6WVLIHSNuXa Dr Feinstein's blog may be viewed at: http://explainingmaths.wordpress.com Dr J