@misc{Lexicon of Arguments, title = {Quotation from: Lexicon of Arguments – Concepts - Ed. Martin Schulz, 29 Mar 2024}, author = {Frege,Gottlob}, subject = {Subsets}, note = {IV 98 Subset/member/element/Frege: subset and element must always be distinguished. FregeVsSchröder/FregeVsAreas Calculus/"Gebietekalkül": zero should not be included as an element in each class. Otherwise, it would be dependent on the particular variety. Once it would be nothing, once it would be something (e.g. negation of a). Solution: zero as a subset (empty set). >Sets, >Set theory, >Element relation, >Zero, >Numbers, >Empty set.}, note = { F I G. Frege Die Grundlagen der Arithmetik Stuttgart 1987 F II G. Frege Funktion, Begriff, Bedeutung Göttingen 1994 F IV G. Frege Logische Untersuchungen Göttingen 1993 }, file = {http://philosophy-science-humanities-controversies.com/listview-details.php?id=273643} url = {http://philosophy-science-humanities-controversies.com/listview-details.php?id=273643} }