11. For a good selection of the literature on Polish mereology , see Srzednicki and Rickey ( 1984 ). 12. Since 1980 or so, however, research on Polish mereology has been almost entirely historical in nature. 13. The Goodman Leonard ( 1940 ) calculus of individuals is the starting point for the American variant of mereology . 14. The classic study of parts and wholes, mereology , has three axioms : the part-of relation is 15. Whereas set theory is founded on the membership relation between a set and its elements, mereology emphasizes the sets. 16. Mereology is a collection of nested and non-nested axiomatic systems, not unlike the case with modal logic.17. Chisholm translated some work by Brentano and by Husserl, and contributed to the post-1970 renaissance of mereology . 18. N��ez has thought much about the foundations of real analysis, the order relations, mereology , topology, and geometry. 19. If M6 and M7 are either assumed or derivable, the result is a mereology with " closure ". 20. Relaxing the requirement that all individuals be spheres yields a formalization of mereology far easier to exposit than Lesniewski's variant.
