Yesterday I did section 10 ¡­

Yesterday I did section 10 about cosets and the theorem of Lagrange and the first part of section 11, about direct products. I included an example showing that the converse of Lagrange does not hold. You'll find that example in the book: Example 15.6 on page 146.

Next week I'll do the rest of section 11 about finitely generated abelian groups. I'll probably also have time to do section 13 about homomorphism.

Section 12 is not in the curriculum, but at a certain point we shall speak more about the dihedral groups.

Geir