The unknown paintings of Kay Nielsen

This chapter deals with the Dehn–Nielsen–Baer theorem, one of the most beautiful connections between topology and algebra in the mapping class group. It begins by defining the obje...

This chapter explains and proves the Nielsen–Thurston classification of elements of Mod(S), one of the central theorems in the study of mapping class groups. It first considers the...

As a major member of the New York School, Barnett Newman is celebrated for his radical explorations of color and scale and, as a precursor to the Minimalist movement, for his signi...