🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsSvenskaРусскийالعربيةفارسی한국어中文日本語EntityQ163335· pop 35· linked from 558 articlesPrincipia Mathebook on the foundations of mathematicsConnectionsordinal numberEntityformal systemEntityCategories1910 in science1910 non-fiction books1912 in science1912 non-fiction books1913 in science1913 non-fiction booksBooks about philosophy of mathematicsBooks by Bertrand RussellLarge-scale mathematical formalization projectsWorks by Alfred North Whitehead