Version: v1, Published online: 1998
Retrieved April 20, 2021, from https://www.rep.routledge.com/articles/biographical/lesniewski-stanis-aw-1886-1939/v-1
Leśniewski was one of the most distinguished members of the Warsaw School of Logic. His scientific development can be divided into two periods. In the first ‘philosophical’ period (1911–16), he worked on problems on the borderline of logic and philosophy. In the second period (1916–39), Leśniewski concentrated on mathematical logic. Together with Łukasiewicz, he established the Warsaw School of Logic. Leśniewski intended to build a comprehensive system of logic which might be the basis for all knowledge. His system, unorthodox in many points, consists of three parts: protothetic (a generalized sentential calculus), ontology (a calculus of names) and mereology (a theory of the whole/part relation).
Wolenski, Jan. Leśniewski, Stanisław (1886–1939), 1998, doi:10.4324/9780415249126-DD036-1. Routledge Encyclopedia of Philosophy, Taylor and Francis, https://www.rep.routledge.com/articles/biographical/lesniewski-stanis-aw-1886-1939/v-1.
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