Teresa Bigorajska is a PhD student of Zofia Adamowicz and a major collaborator of Henryk Kotlarski during his last years. They worked together on ordinal combinatorics of finite sets – a notion heavily used in the book. They studied combinatorial properties of partitions and trees with respect to the notion of largness in the style of Ketonen and Solovay. They developed the machinery for proving independence results presented in the book.
