Anne S. Troelstra Books

The book offers an extensive overview of natural history travel narratives, featuring over four thousand detailed entries spanning four centuries. It encompasses major Western European languages and draws from a diverse array of sources, including both printed books and periodical contributions. This comprehensive collection highlights the evolution and significance of travel literature in the context of natural history.

These two volumes cover the principal approaches to constructivism in mathematics. They present a thorough, up-to-date introduction to the metamathematics of constructive mathematics, paying special attention to Intuitionism, Markov's constructivism and Martin-Lof's type theory with its operational semantics. A detailed exposition of the basic features of constructive mathematics, with illustrations from analysis, algebra and topology, is provided, with due attention to the metamathematical aspects. Volume 1 is a self-contained introduction to the practice and foundations of constructivism, and does not require specialized knowledge beyond basic mathematical logic. Volume 2 contains mainly advanced topics of a proof-theoretical and semantical nature.